Neuroanatomy: Sensory and Motor Systems Overview

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Questions and Answers

Which part of the nervous system controls the voluntary control of muscles?

  • Sympathetic Nervous System
  • Parasympathetic Nervous System
  • Autonomic Nervous System
  • Somatic Nervous System (correct)

Which cranial nerve is responsible for eye movement (Down and In)?

  • Trigeminal
  • Trochlear (correct)
  • Optic
  • Olfactory

Which brain lobe controls the comprehension of spoken words?

  • Parietal Lobe
  • Temporal Lobe (correct)
  • Frontal Lobe
  • Occipital Lobe

Which part of the brain is responsible for coordinating voluntary muscles and maintaining balance?

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

What is a key function of the Midbrain?

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

In the Autonomic Nervous System, which branch is responsible for the 'Fight or Flight' response?

<p>Sympathetic Nervous System (D)</p> Signup and view all the answers

What is a symptom of a Thalamic Pain condition?

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

Which area of the brain is involved in regulation of posture and muscle tone?

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

Flashcards

Sensory information pathway

Sensory information enters the spinal cord from the back (posterior/dorsal) via afferent tracts.

Motor information pathway

Motor information exits the spinal cord from the front (anterior/ventral) via efferent tracts.

Autonomic Nervous System

Controls involuntary body functions like heart beat and digestion.

Sympathetic Nervous System

Part of the autonomic system, responsible for 'fight or flight' response.

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Parietal Lobe Function

Processes sensory information (touch, temperature, pain) from opposite side of body, spatial awareness (PPC).

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Frontal Lobe Function

Controls voluntary movements , Higher-level cognitive functions like planning and judgment.

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Left Hemisphere Damage

Communication (aphasia), motor control (apraxia), and language difficulties are common consequences.

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Cerebral Stroke

A blockage in the arteries supplying the brain leading to localized damage.

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Study Notes

Nervous System

  • Sensory information comes into the spinal cord posteriorly (dorsally) through the afferent tract
  • Motor information comes out of the spinal cord anteriorly (ventrally) through the efferent tract

Somatic Nervous System

  • Controls voluntary muscles
  • Divided into sensory and motor functions

Autonomic Nervous System

  • Controls involuntary functions of body organs
  • Divided into sympathetic (fight or flight) and parasympathetic (rest and digest) systems
  • Both systems work to maintain homeostasis

Cranial Nerves

  • 12 pairs of cranial nerves with various functions
  • Olfactory nerve: smell, sensory
  • Optic nerve: vision, sensory
  • Oculomotor nerve: eye movement, pupil constriction, motor
  • Trochlear nerve: eye movement, motor
  • Trigeminal nerve: motor (TMJ), sensory (face)
  • Abducens nerve: lateral eye movement, motor
  • Facial nerve: motor (facial), anterior 2/3 taste, sensory
  • Vestibulocochlear nerve: hearing, balance, sensory
  • Glossopharyngeal nerve: speech, posterior 1/3 taste, sensory
  • Vagus nerve: gag reflex, swallowing/vocal cords, sensory
  • Accessory nerve: traps, motor
  • Hypoglossal nerve: tongue movement, motor

Brain Lobes

Frontal Lobe

  • Motor cortex: voluntary movement, contra side
  • Broca's area: motor component of speech, language expression
  • Cognitive function: judgment, attention, mood, abstract thinking, aggression
  • Damage: paralysis, personality change, language expression

Parietal Lobe

  • Sensory cortex: receives/processes sensory info from contra side
  • Perceives touch, pain, temperature, PPC
  • Constructional ability: copying shapes and figures
  • Damage: naming objects, math, writing, reading, coordination

Temporal Lobe

  • Auditory cortex: receives/ processes auditory info
  • Wernicke's area: comprehension of spoken word
  • Long-term memory, visual perception
  • Damage: word understanding, recognizing faces, memory, increased aggression

Occipital Lobe

  • Primary visual cortex: processing/interpretation of visual info
  • Damage: visual deficits, hallucinations, illusions, reading/writing, colors

Hypothalamus

  • Maintains homeostasis
  • Controls autonomic nervous system

Brainstem

  • Connects cerebrum and diencephalon with spinal cord
  • Composed of midbrain, pons, and medulla oblongata

Cerebellum

  • Coordinates voluntary muscles
  • Maintains balance and muscle tone (subconscious muscle tone)

Basal Ganglia

  • Regulates posture and muscle tone
  • Affects motor planning areas of cortex

Cerebral Artery Strokes

  • Anterior cerebral artery stroke: contra hemiparesis of LEs, urinary incontinence, behavioral changes, mental impairment
  • Middle cerebral artery stroke: contra hemiparesis of UEs, Broca's and Wernicke's, unilateral neglect, agnosia, sensory ataxia, apraxia
  • Posterior cerebral artery stroke: visual hemianopsia, visual agnosia, thalamic pain, involuntary movement

Hemispheric Damage

  • Left hemispheric damage: difficulties in communication, aphasia, apraxia, dysphagia, hemianopia, left face involvement, right side weakness
  • Right hemispheric damage: difficulty with PPC, impulsive behavior, poor judgment, memory deficits

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