Stanbridge - T6 - Neuro2 - W9 - Balance and Vestibular Rehab

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Questions and Answers

Which statement accurately describes the relationship between 'posture' and 'balance'?

  • Posture includes dynamic movements, while balance refers to maintaining a static position.
  • Posture refers to holding a static position, while balance involves moving effectively without falling. (correct)
  • Posture is a component of motor strategies, while balance relates to sensory strategies.
  • Posture encompasses the sensory environment, and balance describes the limits of stability.

The ability to maintain one's center of gravity within the limits of stability in a given sensory environment defines:

  • Postural control. (correct)
  • Volitional movement.
  • Anticipatory control.
  • Static posture.

Limits of stability are best described as:

  • The area where a person's base of support cannot be changed.
  • Fixed boundaries that remain constant irrespective of the activity.
  • The fixed biomechanics of the individual, regardless of the task.
  • The area where the body can maintain its position without changing its base of support. (correct)

The somatosensory system contributes to balance by providing information about:

<p>Muscle length and tension, joint position, and pressure. (C)</p> Signup and view all the answers

Damage to the vestibulocochlear nerve (CN VIII) would most directly affect:

<p>Feedback regarding head position and movement in relation to gravity. (B)</p> Signup and view all the answers

A patient is having difficulty maintaining their balance when standing on a moving bus. Which sensory system is the MOST important for maintaining balance in this scenario?

<p>Vestibular system. (D)</p> Signup and view all the answers

In what way does the visual system contribute to maintaining balance?

<p>By providing feedback regarding the position of the head relative to the horizon. (A)</p> Signup and view all the answers

A patient sways at the ankles to re-establish equilibrium after a small external perturbation. Which balance strategy is being utilized:

<p>Ankle strategy. (B)</p> Signup and view all the answers

According to Horak and Nashner, which sequence represents the typical order of motor strategy utilization during a balance perturbation, starting with the first response?

<p>Ankle, hip, stepping. (B)</p> Signup and view all the answers

Which of the following situations Primarily requires an anticipatory postural control strategy?

<p>Preparing to lift a heavy box. (C)</p> Signup and view all the answers

A patient with impaired ankle plantarflexion due to peripheral neuropathy will MOST likely have difficulty utilizing which balance strategy?

<p>Ankle strategy. (C)</p> Signup and view all the answers

Which scenario would likely cause an individual to utilize a stepping strategy to maintain balance?

<p>Recovering balance after a large, unexpected force. (C)</p> Signup and view all the answers

Which condition is MOST likely to result in impaired somatosensory feedback contributing to balance deficits?

<p>Peripheral neuropathy. (A)</p> Signup and view all the answers

Which of the following visual impairments is MOST likely to cause balance problems?

<p>Diplopia (double vision). (D)</p> Signup and view all the answers

Impairment of ankle and foot somatosensation is MOST likely to affect which balance mechanism?

<p>Ankle strategy. (A)</p> Signup and view all the answers

Which neurological condition is characterized by ataxia and dysmetria, directly affecting balance control?

<p>Cerebellar degeneration. (C)</p> Signup and view all the answers

Multisensory disequilibrium, which can impair balance, is characterized by dysfunction in which combination of systems?

<p>Vestibular, visual, and somatosensory systems. (B)</p> Signup and view all the answers

During a balance assessment, why is it important to consider sensory conflict?

<p>To determine how effectively the central nervous system integrates conflicting sensory information. (A)</p> Signup and view all the answers

Increased variability of stride length and decreased step length, observed during gait, are MOST likely indicative of:

<p>Impaired postural control. (D)</p> Signup and view all the answers

Which examination finding would be MOST indicative of a vestibular disorder?

<p>Oscillopsia with head movements. (A)</p> Signup and view all the answers

When assessing a patient's DTRs(deep tendon reflexes) as part of a balance evaluation, which nerve roots are typically assessed?

<p>L4 and S1. (D)</p> Signup and view all the answers

The BEST method to examine a patient's ability to integrate sensory information for balance would be:

<p>Sensory Organization Test. (D)</p> Signup and view all the answers

Which of the following is NOT a component of a typical balance assessment?

<p>Cognitive assessment. (A)</p> Signup and view all the answers

During the Clinical Test of Sensory Integration in Balance (CTSIB), which of the following conditions assesses the patient's reliance on vestibular input for balance?

<p>Standing on a foam surface with eyes closed. (B)</p> Signup and view all the answers

What is the MOST likely purpose of using a foam pad during balance testing?

<p>To provide a compliant surface. (D)</p> Signup and view all the answers

Which of the following is an example of postural control with functional mobility?

<p>Transfers. (B)</p> Signup and view all the answers

Adaptation exercises aim to:

<p>Stimulate the brain to relearn and adapt to impaired vestibular neural inputs. (B)</p> Signup and view all the answers

What is the primary goal of habituation exercises in vestibular rehabilitation?

<p>Systematically provoke symptoms. (A)</p> Signup and view all the answers

A patient reports feeling off balance and unsteady, even when sitting, after recovering from a bout of vertigo. Select the intervention that best manages this condition?:

<p>Sensory organization training. (D)</p> Signup and view all the answers

What is the primary focus of gaze stabilization exercises (e.g., X1 viewing) in vestibular rehabilitation?

<p>Improving gaze stability with head motion. (B)</p> Signup and view all the answers

A patient who reports brief spinning sensation (vertigo) with changes in head position is MOST likely experiencing:

<p>Benign paroxysmal positional vertigo (BPPV). (A)</p> Signup and view all the answers

When assessing a patient for potential BPPV, what is the primary purpose of the Dix-Hallpike test?

<p>To provoke vertigo and observe for nystagmus. (A)</p> Signup and view all the answers

The central nervous system uses which processes to accurately sense ones orientation?

<p>Central Processing. (D)</p> Signup and view all the answers

Choose the TRUE statement about the Otoliths.

<p>Two otoliths measure effects of gravity and movement about acceleration/deceleration (B)</p> Signup and view all the answers

A patient demonstrates quick, involuntary, small movements of the eyes from side to side. Choose the correct term that describes this condition:

<p>Nystagmus. (A)</p> Signup and view all the answers

Please select the BEST descriptor of the Vestibulo-ocular reflex:

<p>Maintains gaze stability with head motion. (B)</p> Signup and view all the answers

Pick the appropriate test that identifies the vestibulo-ocular relfex:

<p>Head Thrust Test. (D)</p> Signup and view all the answers

Choose the BEST definition of 'oscillopsia':

<p>Patient will report blurry vision or jumpy vision with head movements. (D)</p> Signup and view all the answers

With unilateral vestibular hypofunction, which intervention technique below is MOST appropriate:

<p>Vestibular balance rehab. (D)</p> Signup and view all the answers

Pick the BEST choice that fits into the category of 'central vestibulopathy':

<p>MS with lesion in cerbellum. (B)</p> Signup and view all the answers

What is the focus of postural control?

<p>Moving effectively within specific limits of stability in a sensory environment. (D)</p> Signup and view all the answers

How are limits of stability BEST characterized?

<p>The area in which the body can maintain position without changing its base of support; they adapt based on task &amp; environment. (B)</p> Signup and view all the answers

When a patient is exposed to a variety of visual stimuli, which sensory system is engaged?

<p>Visual (B)</p> Signup and view all the answers

What is the role of the somatosensory system in balance determined by?

<p>Providing proper muscle length, tension, pressure, vibration, light touch, pain and joint position. (D)</p> Signup and view all the answers

What is the MOST important role of the vestibular system?

<p>Providing feedback to the central nervous system regarding the head's position and movement in relation to gravity. (C)</p> Signup and view all the answers

Which of the following reflects information from the person's postural alignment?

<p>Somatosensory system (D)</p> Signup and view all the answers

According to Horak and Nashner, which of the following is NOT a motor strategy used to recover balance?

<p>Weight-shift strategy (C)</p> Signup and view all the answers

What best describes a reactive postural control?

<p>Motor responses to unexpected events used to restore balance. (D)</p> Signup and view all the answers

What is the MOST likely result of impaired motor function affecting the ankle strategy?

<p>Inability to respond to small balance perturbations while standing. (B)</p> Signup and view all the answers

During which activities would the hip strategy to MOST likely be utilized?

<p>Recovering balance after a rapid, large external force. (A)</p> Signup and view all the answers

What is the MOST likely outcome if a person presents with decreased strength in lower extremities?

<p>Impaired stepping strategy (B)</p> Signup and view all the answers

Which sensory system provides information about head position relative to the environment?

<p>Visual (B)</p> Signup and view all the answers

How might age related multi sensory disequilibrium present?

<p>Vestibulopathy, retinopathy * peripheral neuropathy (D)</p> Signup and view all the answers

What is the function of central integration in balance control?

<p>To process and prioritize sensory information when sensory conflicts arise. (D)</p> Signup and view all the answers

What is an effect on gait, that result from an impaired ankle strategy?

<p>Increased postural sway during stance phase (A)</p> Signup and view all the answers

When a PTA is gathering previous medical history of a patient, what information would NOT contribute to balance?

<p>Hobbies and interests (D)</p> Signup and view all the answers

When conducting a PT evaluation for balance, concerning the patient's sensory or motor skills, which measure would be the MOST appropriate?

<p>Assessing ROM &amp; strength of LE's (A)</p> Signup and view all the answers

When examining DTRs, which nerve roots are typically assessed?

<p>L4 and S1 (A)</p> Signup and view all the answers

During a balance assessment using the CTSIB, what sensory component is being assessed when the patient is standing with eyes closed on a firm surface?

<p>Vestibular input (C)</p> Signup and view all the answers

What is the primary goal of utilizing a 'foam and dome' test?

<p>Isolate vestibular input (D)</p> Signup and view all the answers

According to the slide titled 'Balance Rehabilitation', what are the main components to focus on?

<p>All of the above (D)</p> Signup and view all the answers

Why do vestibular adaptation exercises involve head movements?

<p>To facilitate central adaptation to impaired vestibular inputs. (D)</p> Signup and view all the answers

During X1 viewing, what are the movements of the head and eyes?

<p>Eyes are fixed on a stationary target. (A)</p> Signup and view all the answers

What is a sign indicating dysfunction of VOR?

<p>Oscillopsia (A)</p> Signup and view all the answers

Which of the following strategies is MOST appropriate when the vestibular system is severely impaired?

<p>Substitution (C)</p> Signup and view all the answers

What is the primary goal of habituation?

<p>Decreasing symptoms (B)</p> Signup and view all the answers

What is being assessed when performing the 'Head-Impulse test'?

<p>Vestibulo-ocular reflex (VOR) (A)</p> Signup and view all the answers

For patients who reports dizziness when moving in certain positions, what would be the PRIMARY examination method?

<p>Motion sensitivity testing (B)</p> Signup and view all the answers

A patient presents with dizziness after a recent head trauma. Which subjective description is MOST indicative of BPPV:

<p>Sharp, spinning sensation when sitting up or rolling in bed. (A)</p> Signup and view all the answers

What are causes of peripheral vestibular dysfunction?

<p>All of the above (D)</p> Signup and view all the answers

A patient is diagnosed with Unilateral Vestibular Hypofunction (UVH). They are likely to have?

<p>Will have some impairment of VOR and/or VSR. (A)</p> Signup and view all the answers

A person presents with hearing loss, SIGNIFICANT oscillopsia, and is experiencing disequilibrium in dark environments. What is the MOST likely condition?

<p>Bilateral Vestibular Hypofunction (B)</p> Signup and view all the answers

What is the PRIMARY intervention strategies for a patient with Bilateral Vestibular Hypofunction?

<p>Balance rehab (B)</p> Signup and view all the answers

What is the MOST likely cause of central vestibular dysfunction?

<p>Multiple Sclerosis (D)</p> Signup and view all the answers

When testing for Dix-Hallpike, what is the purpose of observing the eyes?

<p>To observe for nystagmus (A)</p> Signup and view all the answers

While reviewing the plan of care for a patient with BPPV who presents with posterior canal involvement, what intervention can the PTA expect to utilize?

<p>Canalith Repositioning Maneuver (D)</p> Signup and view all the answers

What is the KEY to vestibular rehab when performing habituation?

<p>Patient education (A)</p> Signup and view all the answers

What is the MOST accurate definition of 'limits of stability' concerning postural control?

<p>The range within which an individual can maintain their center of gravity without changing their base of support. (D)</p> Signup and view all the answers

Which scenario BEST exemplifies anticipatory postural control?

<p>Preparing to lift a heavy box by adjusting posture in advance. (B)</p> Signup and view all the answers

During a balance assessment, a patient demonstrates a delayed response to perturbations. Assuming intact sensory systems, which of the following impairments would MOST explain this?

<p>Inefficient central integration. (A)</p> Signup and view all the answers

A patient demonstrates an inability to maintain their balance when standing with their eyes closed on a foam surface. This MOST likely indicates difficulty integrating:

<p>Vestibular and somatosensory inputs. (D)</p> Signup and view all the answers

A patient recovering from a stroke exhibits impaired balance characterized by rigidity and bradykinesia. These symptoms MOST closely align with which co-existing neurological condition?

<p>Parkinson's Disease (A)</p> Signup and view all the answers

An elderly patient with diabetes reports increasing difficulty with balance, especially in low-light conditions. This presentation is MOST consistent with:

<p>Multisensory Disequilibrium. (C)</p> Signup and view all the answers

A patient demonstrates increased postural sway and reports unsteadiness ONLY when walking on uneven surfaces such as gravel or thick carpet. Which sensory system is MOST likely impaired?

<p>Somatosensory (D)</p> Signup and view all the answers

A patient is being treated for balance issues. The plan of care includes interventions that require the patient to walk on a treadmill while performing mental math. What is the PRIMARY purpose of dual-tasking in this scenario?

<p>To improve central integration by challenging sensory processing during functional movement. (A)</p> Signup and view all the answers

During a PT examination, the patient reports their vision occasionally blurs with quick head movements during the day. What intervention addresses this patient's PRIMARY complaint?

<p>Gaze Stabilization Exercises. (B)</p> Signup and view all the answers

Select the MOST appropriate strategy when the vestibular system is severely impaired?

<p>Implement compensation and substitiution as there is reliance on other sensory systems (B)</p> Signup and view all the answers

A patient reports feeling unsteady and 'off' after recovering from a recent bout of vertigo. What is the MOST important management consideration?

<p>Address psychological factors if the patient has anxiety. (A)</p> Signup and view all the answers

During vestibular rehabilitation, which of the following components is MOST critical, to improve both gaze stability and balance.

<p>Head and eye movements that reproduce symptoms. (D)</p> Signup and view all the answers

A patient is referred to PT with complaints of dizziness due to suspected central pathology origin. Which sign or symptom below is MOST likely associated?

<p>Slurred Speech (A)</p> Signup and view all the answers

When examining for smooth pursuits, VOR, and saccades; what is the PTA observing for?

<p>Nystagmus (D)</p> Signup and view all the answers

During a PT evaluation of a patient complaining of imbalance, the PTA observes the patient has a wide base of support, and unequal step length. What is this patient likely demonstrating?

<p>Ataxia (D)</p> Signup and view all the answers

Select the option that is NOT a component of central integration.

<p>Semicircular Canals (D)</p> Signup and view all the answers

What is the MOST important component to communicate with patients regarding habituation training?

<p>The training provokes a moderate level of symptoms (A)</p> Signup and view all the answers

Which of the following parameters is MOST important when performing adaptation exercises?

<p>Low reps with long duration (A)</p> Signup and view all the answers

A patient presents to the clinic with vertigo, but no reports of dizziness. What is the BEST option?

<p>Vertigo presents as a spinning sensation. Dizziness is more broad; so ask the patient more questions for more clariy. (A)</p> Signup and view all the answers

Select the TRUE statement regarding the Dix-Hallpike test:

<p>It is a diagnostic test used for BPPV (C)</p> Signup and view all the answers

Flashcards

What does posture imply?

The term implies holding a particular static position.

What do postural control and balance refer to?

It refers to the ability to move efficiently and effectively in a variety of environments and situations without falling.

What is postural control?

The ability to control the center of gravity within specific limits of stability in a given sensory environment.

What are limits of stability?

Area or boundaries in which the body can maintain position without changing base of support.

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Name the sensory systems involved in balance.

Somatosensory, visual, and vestibular systems.

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Name the motor systems involved in balance.

Strength, ROM, and motor (balance) strategies.

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What motor startegies did Horak and Nashner describe?

Ankle, hip and stepping startegies. Healthy adults use these to recover balance from sudden pertubations.

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Reactive postural control

Motor activity used to maintain or restore balance when unexpected events or environmental demands occur.

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What is anticipatory postural control?

Motor activity that occurs before a planned movement to maintain balance when a shift in the center of mass is anticipated

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Key aspects of an Ankle strategy.

Maintains COG over BOS with small perturbations.

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Key aspects of a Hip strategy.

Used when COG moves more quickly over BOS OR large perturbations.

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Key aspects of Stepping Strategy

Used when LOS are exceeded or approached.

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What information does the somatosensory system provide?

Provides proprioceptive information regarding muscle length and tension, pressure, vibration, light touch, pain, and joint position

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What information does the visual system provide?

Provides information regarding head position relative to the environment, allows us to detect objects and obstacles and works with vestibular system for head orientation and gaze stability.

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What information does the vestibular system provide?

Provides CNS with feedback regarding the position and movement of the head with relation to gravity, includes the labyrinths and the vestibulocochlear nerve (cranial nerve VIII).

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List four primary roles of the vestibular system.

Senses and perceives self-motion, orients head to vertical, controls the COM (center of mass), stabilizes the head.

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How does the vestibular system sense motion?

Receptors in semicircular canals detect angular acceleration, receptors in otoliths detect linear acceleration

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Define vestibulo-ocular reflex (VOR)

Maintains gaze stabilty with head motion.

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Define vestibulospinal reflex (VSR)

Maintains postural control with head tilts and movements

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Conjugate eye movements

Movement of both eyes in the same direction to maintain binocular gaze

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Convergence

Movement of eye inward when looking at near objects.

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Saccades

Rapid movement of the eyes between fixation points.

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Smooth pursuit

Allows a moving object to be visually followed while keeping the image on the center of the retina.

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What is VOR (vestibulo-ocular reflex)?

Reflex that allows for gaze stabilization during head movement, allowing focus when your head is moving

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Nystagmus

An involuntary back-and-forth, up-and-down, or rotating movement of the eyes.

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Cerebellar Degeneration

Ataxia and dysmetria.

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What is Multisensory disequilibrium?

Dysfunction of the vestibular, visual, and somatosensory systems.

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Goals of balance rehabilitation

Improving sensory organization, balance reactions, postural control, and functional strength.

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Increase somatosensory, what can you do?

To increase use of somatosensory system, ask patient to close their eyes.

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What des adaptation exercises in balance rehab do?

Improving balance by relearning and adapting

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How to do X1 viewing

Keep eyes fixed on a stationary visual target while the subject moves the head side to side, or up and down

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How to do X2 viewing

Maintaining visual fixation on a visual target when the head and target move in the same or opposite directions

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If vestibular has impaired gaze stability, what can you do?

Use cervico-ocular reflex (COR) at low frequency head movement, or smooth pursuit, or saccades.

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Vestibular rehab specific substitution excercises.

Specific substitution exercises for gaze stability: Target on Target, Target to Target

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How do disequilibrium exercise help

Sensory organization training to increase use of other visual and somatosensory feedback for postural control

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What do Habituatation exercises do?

To decrease patient's symptoms by systematically provoking symptoms up to moderate 5/10.

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Benign Paroxysmal Positional Vertigo (BPPV)

Caused by otoconia (calcium carbonate crystals) which are displaced from the otoliths.

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Symptoms of Benign Paroxysmal Positional Vertigo (BPPV)

Sudden onset of vertigo (true spinning) induced by a change in position

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Canalith Repositioning Maneuver (CRM)

Involves series of head and body positions to move otoconia around canal, returning them to utricle and thus relieving symptoms from BPPV

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Dix-Hallpike Positional Test

Performed by an MD, nurse, or PT, involves 45 deg C/S rotation in long sitting, followed by rapidly moving to supine with slight C/S extension, clinician observes for eye spontaneous nystagmus and symptoms of vertigo

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Study Notes

  • Posture implies holding a particular static position.
  • Postural control and balance is the ability to move efficiently and effectively in a variety of environments and situations.
  • Postural control controls the center of gravity within specific limits of stability in a given sensory environment.
  • Limits of stability define the area or boundaries in which the body can maintain position without changing the base of support (BOS).
  • Limits of stability change according to task, the individual's biomechanics and environment.

Sensory and Motor Systems

  • Critical components for balance include sensory systems and motor systems.
  • Sensory systems include somatosensory, visual and vestibular systems.
  • Motor systems include strength, range of motion (ROM), and motor (balance) strategies.

Motor Strategies for Postural Control

  • To maintain balance, the body continuously adjusts position in space to keep the center of mass (COM) over the base of support (BOS) or to bring the COM back to that position after a perturbation.
  • Ankle, hip, and stepping strategies are the three primary movement strategies used by healthy adults to recover balance in response to sudden perturbations of the supporting surface.

Postural Control: Reactive vs. Anticipatory

  • Reactive postural control is motor activity used to maintain or restore balance when unexpected events or environmental demands occur, also known as automatic postural responses.
  • Aniticipatory postural control is motor activity that occurs before a planned movement to maintain balance when a shift in the center of mass is anticipated.

Motor Strategies

Ankle Strategy

  • This maintains center of gravity(COG) over base of support (BOS) with small perturbations.
  • The activation pattern goes from distal to proximal.
  • This is the "first line of defense".

Hip Strategy

  • The hip strategy is used when center of gravity (COG) moves more quickly over base of support (BOS).
  • It is used when a patient has large perturbations
  • The activation pattern goes from proximal to distal.

Stepping Strategy

  • The stepping strategy is engaged when the limits of stability are exceeded or approached.
  • It is needed to establish a new base of support by moving a foot to avoid a fall.

Sensory Systems - Somatosensory

  • Somatosensory system provides proprioceptive information regarding muscle length and tension, pressure, vibration, light touch and pain, and joint position.

Sensory Systems - Visual

  • The visual system provides information regarding head position relative to the environment.
  • The visual system allows for detection of objects and obstacles.
  • The visual system contributes to anticipatory and reactive postural control.
  • The visual system works with the vestibular system for head orientation and gaze stability.

Sensory Systems - Vestibular

  • The vestibular system provides the central nervous system (CNS) feedback regarding the position and movement of the head with relation to gravity.
  • The vestibular system includes the labyrinths and the vestibulocochlear nerve, which is cranial nerve VIII.
  • Primary roles of vestibular system in postural control include sensing self-motion, orienting the head to vertical, and controlling and stabilizing the head.

Vestibular Anatomy

  • Labyrinth consists of 5 receptors.
  • Receptors in three semicircular canals detect angular acceleration.
  • Receptors in two otoliths detect linear acceleration.

Balance - Simplified

  • Input from the eyes, inner ear, and feet are synthesised by the central processor.
  • Output creates action in the muscles of the neck, trunk, and lower extremities, and the extraocular muscles.

Causes of Impaired Balance

  • Can be due to Impairments involving the Peripheral, the Central or Cognitive systems

Causes of Impaired Balance: Peripheral

  • Impaired visual feedback due to conditions like glaucoma, cataracts, macular degeneration, diploplia and visual field cuts.
  • Impaired somatosensory feedback due to disease or trauma resulting in absent, impaired or inaccurate information.
  • Impaired vestibular feedback due to disease or trauma to CN VIII and/or peripheral end organ resulting in vestibular hypofunction/dysfunction (aka vestibulopathy).

Causes of Impaired Balance: Peripheral Motor

  • Decreased strength from lower extremities (LEs), limited range of motion (ROM) at ankle, knees and hips results in a impaired stepping strategy.
  • Limited ankle range of motion (ROM), impaired plantar and dorsiflexor strength, impaired/absent somatosensation from ankle and foot results in an impaired ankle strategy.
  • Impaired hip strength and range of motion (ROM), impaired/absent somatosensation from hips and trunk results in an impaired hip strategy.

Neurological disorders that affect balance

  • Cerebellar degeneration which causes ataxia and dysmetria.
  • Stroke or head trauma which causes paresis, sensory loss, visual field defects, or impaired spatial perception.
  • Parkinson's disease which causes rigidity and bradykinesia.
  • Multiple sclerosis (MS) affects balance by impairing function in multiple locations of the brain and spinal cord.
  • Multisensory disequilibrium refers to combined dysfunction of the vestibular, visual, and somatosensory systems.

Central Causes of Impaired Balance

  • Central integration occurs in the central nervous system (CNS), the central processor
  • No one sensory system can provide the central nervous system (CNS) accurate information regarding position and motion of the body.
  • Sensory strategies vary as a function of age, task and environment.
  • Central processing is important when there are sensory conflicts within or between sensory systems.
  • Sensory conflict arises when one sensory system provides inaccurate information or when the central nervous system (CNS) cannot resolve sensory conflict.
  • Sensory conflict leads to inappropriate or impaired motor response which results in disequilibrium, dizziness, visuo-spatial disorientation, and/or falls.

Impact of Impaired Postural Control on Gait

-An impaired ankle strategy, increased postural sway in standing can affect limb progression during stance phase.

  • Gait deviations associated with increased fall risk include decreased gait speed and step length; and increased step width, variability of stride length and width, and decreased toe clearance during swing phase.

PT Examination for "Disequilibrium”

  • Includes fall history, medication review, standardized self-report questionnaires, and complaints of imbalance, dizziness, or other symptoms.
  • Standardized self-report questionnaires include the Falls Efficacy Scale (FES) and Activities-Specific Balance Confidence Scale (ABC Scale).

PT Evaluation

  • The physical therapy (PT) evaluation includes strength testing, sensory screen, deep tendon reflexes(DTRs), cranial nerve (CN) exam, and cerebellar screening, and balance assessment
  • The cranial nerve (CN) exam includes oculomotor (CN III) and vestibular (CN VIII) assessments.
  • Cerebellar screening looks for rapid alternating movements (RAM) and dysdiadochokinesia.

Balance Assessment

  • Assessments include Sensory Organization Test, Clinical Test of Sensory Integration in Balance (CTSIB), aka "Foam and Dome" test, Computerized Dynamic Posturography (CDP), and/or modified CTSIB.

Functional Balance Tests

  • Functional balance tests include static and dynamic balance, and functional mobility. Functional mobility tests include TUG, Dynamic Gait Index (DGI), and Functional Gait Assessment

Balance Rehabilitation

  • Balance and fall prevention focus on the individual, the task, the environment, and their interactions.
  • Balance Rehabilitation include Flexibility and Functional strength training instead of strengthening isolated muscles.
  • The goals of the sensory organization portion of balance rehabilitation are to improve sensory organization, balance reactions, postural control with functional mobility and functional strength that contribute impaired balance reactions.
  • Balance Rehabilitation aims for a decrease in the level of fall risk, improves self-efficacy

Balance Rehabilitation: Sensory Organization Training:

  • Dynamic balance activities improve feedback and accurate use of the visual , vestibular and somatosensory systems for postural control
  • If impaired CNS can be trained to assist by "forcing" an impaired sensory system to be more active -Ex: to increase the use of the somatosensory system ask the pt to close their eyes
  • If absent approach is to compensate or substitute with another system

Balance Rehabilitation: Postural Strategy Training:

  • Is balance reaction
  • The selection of which postural tasks will be needed for for each strategy ankle, hip, stepping
  • Practice the task in a safe environment then you will progressively start challenging the environment
  • Designed to clients assist clients with their apporpriate strategy to prevent falls

Task Specific Training: Locomotion:

  • Balance is needed to improve during gait it can be made more challenging by increasing speed, number of stoops/starts, addition to environmental/ surfaces and adding head turns -Gait can be improved on (BWSTT or vector)
  • You can add cognitive or manual dual tasks

Sensory Systems - Vestibular

  • Provides the CNS with feedback regarding the position movement ot the head with relation to the
  • Includes the labyrinths the nerve relating Cranial 8
  • The anatomy of the Labyrinth: 5 receptors
  • 3 Semicircular cannals ( head movement( with angular rotation)
  • and about acceleration/ deacceleration

Vestibular Input

  • Uses Receptors into ( 3) canals detect angular
  • Receptors in (2) otoliths detect linear

Vestibular System: Two important Reflexes

  • The (VOR) vestibulo-ocular relfex: maintains gaze stability with head motion if impaired VOR will result in oscillopsia
  • ((VSR) vestibulospinal Reflex : -Maintains posture with head tilts and movements impairments will results in postural instability

Visual and Vestibular together

  • Use together to generate and maintain their upright posture , keep track their position in space balance
  • Balance conjugation. convergence, saccades. smooth pursuit
  • Ocularmotor actions to maintain

What is Normal eyemovements

  • Eye maintain their binocular gaze by moving the eye in the same direction
  • ( diplopia) double will occur if the Eyes maintain moving at the same time convergence
  • rapid eye movment movement in vision

Visual and Vestibular together to maintain

  • Eye momvent (Vor) which allows to stabilize to gane durng head monvement which will make the imaging remain stable on retina
  • steady gane eye movement during oppsoite head movement

Normal Eye Movement

  • Normal eye movement consist of Nystagmus a involuntary eye movement
  • Eye movement when it comes to the end of the eyes and there no spontaneous there usually a cause that can be pathogenic

Vestibular Disorders

  • Peripheral vestibular dysfunction or Central Vestibular Dysfunction

Peripheral Vestibular Dysfunction

  • Dxs: unilateral vestivular hypofucntions due to labrythitis .bilateral vestibular hypofucntion
  • Endolymahphtic hyrdrops( meneires DIsease)
  • Acoustic neromua

Commonal Synmptoms

  • Vertigo Changes or rapid eye movement and position ,Onset suddenly will ,nausea/enviorment dizziness ,MILD to MD diseqilibirium. with closes eyes or in complexes visual Enviornments if there is (VOR) pt report blurry

Peripheral Vestibular Dysfunction

  • 1.Unilateral Vetibular Hyperfuntion(Virus) infection on verve
  • Results in (VUH) with be impaire will be linnger/ weeks. with intervention Vetsibuar Neurits:same as above but NO COHCLEA impairement

Periphael Vetibular Dsyfucntion

Bilateral Vesitbuar HYPO : from Ototoxicity:caused primarity by antibiotic: chemotheraopy Symtopms; hearing loss. significant oscilllapsia. NO comaplints Intervention:Vestibuarl rehab. compensation

Vesitbuelr Dysfunction

  • AKa Meniere's Dieases Inner ear "plumbing problems" The symptom inclue;spinning. loss of balance /vomits will be audial symptiom free and be lasting damage

interevtion

will vestublar rehba and help with laters stages

Peripheral Vesitbular

  • acoustic neuroma beging slow growing tumor on C 8
  • 3 common intercranial Tumor Sx;progressive . unilateral hearing loss, tinnius
  • Intervention: via gamma knif. and balance rehab

Central Vesitbulpathg

Lession or result in cental vestibuapth possible Neuorological disorders: Ms cerebella . Pontine . .TBI common signs and symptoms.

  • Near constant vertigo or dizziness
    • moderate neuro defifcitts such as diplopail. A taxia. coordination parasthesias INTERVETNION; Vestibalr rehab

Postural

Persisten percpeutal dizzzniess or 3PD

  • after Acute episodiof Dizziens. vertigo or ibnalce sx;worsens with posiotins.
  • Ptintervention rehab and sesnroy organiiztion

PT Interventions

  • Subjective history, OoclumtoorExam. motion sensitivity test Functionbal test

OculotorExam

  • In dark room, convergence. *head imuplse and dynamic vision
  • frezels goggles for head shakes

Head implse

  • Reflex

Vesitbair test

Mtion sensitivity test clncias test to assess how to develop the hom exercise prgramot ot assess which sensnory that we can

Dizzness descriptions

if Pt c/o description of lighteadness or BPPv or description for other areas.

Intervention Vestibualr Rehab

with imbalance or dizznes, can pt with diseqillibirum. a histrory of loss of or gait instabity caused by peripheal /c

Three rehab for Vertigo

  • Adaptiation exercises in whih brian relearns. helps facilitate adaptation with impared (Vor)
  • Inovles hand movement those ptypcaillya avoid

VertibualrRebah:Adopt:

  • uses keeping eyes fixed on stationary vsusally while the subject moves teh side. of head move teh head side to side. or or up and down
  • 2 vinteing involves maintaniung vsual fixiation . for heads mmoevement

What is impaoired

  • The vestibule systems is not there are and compensaor by other system to see we if able to compenaste

the Rehabitlations

  • Reps exercises reduce . the symptoms of sytems for a level spcfiic motons
  • PAttenuebates that motion. is pt is education pt needs to be the p and we wil idienfy to use msotion

Vertibular Parameter

reps by dose Adaption excersides for:5 for s c

Is Diiziness Always Vestibular?no it could be :

  • Banncce disorder. Etiolgy cuold .
  • Multi sensory . axneity it ciuldx also : cerbvorgenic dizzy with neck pain pt can get coiboneb of intervention t address cerivcal and vestibul

Proble,

  • Impiared gaze with Diznnes
    =Primary Adaptation exercises tx =Motion sensitivity -primaty is Habaitiatuion
  • postual ibmalce = snsorry and motor strategies
  • ABsent Vor or Disquilbirumi= rehab vestigo =Canaliith repsosiitng.

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