Neurological System Overview

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Questions and Answers

What is the CNS composed of?

brain, spinal cord, and meninges

What are the structures of the neurological system?

CNS, peripheral nervous system, autonomic nervous system

What are the 2 parts of the autonomic nervous system?

sympathetic and parasympathetic

What is the sympathetic nervous system responsible for?

<p>fight or flight</p> Signup and view all the answers

How many pairs of cranial nerves are there?

<p>12 pairs</p> Signup and view all the answers

What is the cerebrum?

<p>2 hemispheres that are divided into 4 lobes</p> Signup and view all the answers

What are the 4 lobes of the cerebrum?

<p>frontal, parietal, temporal, occipital</p> Signup and view all the answers

Which lobe controls voluntary movements and skeletal actions?

<p>frontal lobe</p> Signup and view all the answers

What is the Broca area of the brain responsible for?

<p>speech</p> Signup and view all the answers

Which side of the body does the Left frontal lobe control?

<p>right side</p> Signup and view all the answers

What side of the body does the right frontal lobe control?

<p>left side</p> Signup and view all the answers

Which lobe controls talking and writing, emotions, intellect, reasoning, judgement, and behavior?

<p>frontal lobe</p> Signup and view all the answers

Which lobe interprets tactile sensations such as touch, pain, temperature, shapes, and two point discrimination?

<p>parietal lobe</p> Signup and view all the answers

Which lobe receives and interprets impulses from the ear?

<p>temporal lobe</p> Signup and view all the answers

Which lobe contains the Wernicke area?

<p>temporal lobe</p> Signup and view all the answers

What is Wernicke's area responsible for?

<p>interpreting auditory stimuli</p> Signup and view all the answers

Which lobe is associated with reading and understanding?

<p>occipital lobe</p> Signup and view all the answers

Which lobe is the primary visual receptor center?

<p>occipital lobe</p> Signup and view all the answers

What is the function of the frontal lobe?

<p>Controls voluntary movements and skeletal actions.</p> Signup and view all the answers

What is the function of the occipital lobe?

<p>Primary visual receptor center.</p> Signup and view all the answers

What is the function of the temporal lobe?

<p>Receives and interprets impulses from the ear.</p> Signup and view all the answers

What does the diencephalon consist of?

<p>thalamus and hypothalamus</p> Signup and view all the answers

Which part of the diencephalon is crucial to human emotion and creativity?

<p>thalamus</p> Signup and view all the answers

Which part of the diencephalon is crucial for regulating many body functions?

<p>hypothalamus</p> Signup and view all the answers

Which part of the diencephalon is crucial for regulating respiratory functions?

<p>hypothalamus</p> Signup and view all the answers

Which part of the brain is considered the relay station?

<p>thalamus</p> Signup and view all the answers

Where is sex drive regulated?

<p>hypothalamus</p> Signup and view all the answers

What is the coordinator of ANS activity and stress response?

<p>hypothalamus</p> Signup and view all the answers

Where is the brain stem located?

<p>between cerebral cortex and spinal cord</p> Signup and view all the answers

What is the brain stem consisted of mostly?

<p>nerve fibers</p> Signup and view all the answers

What are the parts of the brain stem?

<p>midbrain, pons, medulla oblongata</p> Signup and view all the answers

Which part of the brain stem contains many motor neurons and tracts?

<p>midbrain</p> Signup and view all the answers

Which part of the brain contains vital autonomic centers such as respiratory, heart and GI function?

<p>medulla oblongata</p> Signup and view all the answers

Which part of the brain merges into the thalamus and hypothalamus?

<p>midbrain</p> Signup and view all the answers

Which part of the brain contains ascending sensory and descending motor tracts as well as 2 respiratory centers that coordinate with the main respiratory center?

<p>pons</p> Signup and view all the answers

Where do crossing of motor fibers occur?

<p>medulla oblongata</p> Signup and view all the answers

Where is the cerebellum located?

<p>under the occipital lobe</p> Signup and view all the answers

What are the primary functions of the cerebellum?

<p>motor coordination of voluntary movements, maintenance of equilibrium, maintenance of muscle tone</p> Signup and view all the answers

What might a positive Rombergs test mean?

<p>cerebellum issue</p> Signup and view all the answers

If someone has a problem controlling their posture, urinating, and with their response to pain, what might they have an issue with?

<p>spinal cord</p> Signup and view all the answers

What sensation does the anterolateral tract carry?

<p>sensations of pain, temperature, itch, and crude touch</p> Signup and view all the answers

What sensation does the posterior column carry?

<p>sensations of position, vibration, and finely localized touch</p> Signup and view all the answers

With which pathway would a person not be able to precisely locate or say what a thing was when placed in their hand?

<p>anterolateral tract</p> Signup and view all the answers

Define Proprioception:

<p>our sense of body position</p> Signup and view all the answers

Define Stereognosis:

<p>finely localized touch</p> Signup and view all the answers

Using which pathway would a person be able to differentiate an object placed in their hands with their eyes closed and be able to tell what it is?

<p>Posterior column</p> Signup and view all the answers

What are the 2 sensory pathways of the CNS?

<ol> <li>anterolateral tract 2. posterior column</li> </ol> Signup and view all the answers

What do pyramidal (corticospinal) tracts do?

<p>mediate voluntary movement, particularly very skilled, discrete purposeful movements</p> Signup and view all the answers

Which Motor pathway of the CNS regulates writing?

<p>pyramidal (corticospinal) tract</p> Signup and view all the answers

What is an example of a discrete purposeful movement?

<p>writing</p> Signup and view all the answers

What is an example of a gross autonomic movement?

<p>walking</p> Signup and view all the answers

What does the extrapyramidal tract do?

<p>maintain muscle tone and control body movement</p> Signup and view all the answers

How many cranial nerves are there?

<p>12</p> Signup and view all the answers

Where do cranial nerves originate from?

<p>brain, midbrain, and brainstem</p> Signup and view all the answers

List out the 12 cranial nerves:

<ol> <li>olfactory 2. optic 3. oculomotor 4. trochlear 5. trigeminal 6. abducens 7. facial 8. acoustic 9. glossopharyngeal 10. vagus 11. accessory (spinal) 12. hypoglossal</li> </ol> Signup and view all the answers

Which type is olfactory motor, sensory, or both?

<p>sensory</p> Signup and view all the answers

Which type is optic motor, sensory, or both?

<p>sensory</p> Signup and view all the answers

Which type is oculomotor motor, sensory, or both?

<p>both</p> Signup and view all the answers

Which type is trochlear motor, sensory, or both?

<p>motor</p> Signup and view all the answers

What type is trigeminal motor, sensory, or both?

<p>both</p> Signup and view all the answers

What type is abducens motor, sensory, or both?

<p>motor</p> Signup and view all the answers

What type is facial motor, sensory, or both?

<p>both</p> Signup and view all the answers

What type is acoustic motor, sensory, or both?

<p>sensory</p> Signup and view all the answers

What type is glossopharyngeal motor, sensory, or both?

<p>both</p> Signup and view all the answers

What type is spinal accessory motor, sensory, or both?

<p>motor</p> Signup and view all the answers

What type is hypoglossal motor, sensory, or both?

<p>motor</p> Signup and view all the answers

What does cranial nerve I do?

<p>sense of smell</p> Signup and view all the answers

What is the cervical spine?

<p>C1-C8</p> Signup and view all the answers

What is the thoracic spine?

<p>T1-T12</p> Signup and view all the answers

What is the lumbar spine?

<p>L1-L5</p> Signup and view all the answers

What is the coccygeal spine?

<p>coccyx (tailbone)</p> Signup and view all the answers

How do nerves enter and exit the spinal cord?

<p>through roots</p> Signup and view all the answers

Sensory afferent fibers

<p>enter through dorsal root of cord</p> Signup and view all the answers

Motor efferent fibers

<p>exit through anterior root of cord</p> Signup and view all the answers

The higher up the injury on a spinal cord the _____ it is for breathing (better or worse)

<p>worse</p> Signup and view all the answers

What are the older adult considerations pertaining to the neurological system:

<p>decreased taste, scent, ability to hear, ability to see, and increase in tremors that occur with movement</p> Signup and view all the answers

Where is motor activity controlled in an infant

<p>the spinal cord and medulla</p> Signup and view all the answers

What is important to remember pertaining to the neurological system with infants?

<p>their neuro system is not fully developed at birth</p> Signup and view all the answers

What is important to remember with pregnant women pertaining to the neurological system?

<p>baby may be compressing the spinal cod and causing issues (tingling in thigh, carpel tunnel syndrome, leg cramps, dizziness and lightheadedness)</p> Signup and view all the answers

What does a decrease in cerebral blood glow cause?

<p>dizziness and loss of balance</p> Signup and view all the answers

What does a slower nerve conduction cause?

<ul> <li>slower reaction time</li> <li>decreased touch, pain, taste, and smell</li> </ul> Signup and view all the answers

Which age group has general atrophy with steady loss of neuron structure in brain and spinal cord?

<p>older adults</p> Signup and view all the answers

The sympathetic nervous system is responsible for what response?

<p>fight or flight</p> Signup and view all the answers

Which lobe contains Wernicke's area?

<p>temporal lobe</p> Signup and view all the answers

What is the main function of the parietal lobe?

<p>Interprets tactile sensations such as touch, pain, temperature, shapes, and two point discrimination</p> Signup and view all the answers

What is/are the pyramidal (corticospinal) tract(s) responsible for?

<p>mediate voluntary movement, particularly very skilled, discrete purposeful movements</p> Signup and view all the answers

What is/are the extrapyramidal tract(s) responsible for?

<p>maintain muscle tone and control body movement</p> Signup and view all the answers

What does the cervical spine include?

<p>C1-C8</p> Signup and view all the answers

What does the thoracic spine include?

<p>T1-T12</p> Signup and view all the answers

What does the lumbar spine include?

<p>L1-L5</p> Signup and view all the answers

What does the coccygeal spine include?

<p>coccyx (tailbone)</p> Signup and view all the answers

Describe sensory afferent fibers:

<p>enter through dorsal root of cord</p> Signup and view all the answers

Describe motor efferent fibers:

<p>exit through anterior root of cord</p> Signup and view all the answers

Older adult considerations pertaining to the neurological system:

<p>decreased taste, scent, ability to hear, ability to see, and increase in tremors that occur with movement</p> Signup and view all the answers

What is the function of the sympathetic nervous system?

<p>fight or flight</p> Signup and view all the answers

Describe the cerebrum

<p>2 hemispheres that are divided into 4 lobes</p> Signup and view all the answers

What is the frontal lobe responsible for?

<p>Voluntary movements and skeletal actions, talking and writing, emotions, intellect, reasoning, judgement, and behavior</p> Signup and view all the answers

What is the occipital lobe responsible for?

<p>Reading and understanding. Primary visual receptor center</p> Signup and view all the answers

What is the temporal lobe responsible for?

<p>Receives and interprets impulses from the ear. Contains Wernicke area</p> Signup and view all the answers

Define the anterolateral tract.

<p>sensations of pain, temperature, itch, and crude touch</p> Signup and view all the answers

Define the posterior column.

<p>sensations of position, vibration, and finely localized touch</p> Signup and view all the answers

Define pyramidal (corticospinal) tracts

<p>mediate voluntary movement, particularly very skilled, discrete purposeful movements</p> Signup and view all the answers

Define extrapyramidal tract

<p>Maintain muscle tone and control body movement</p> Signup and view all the answers

Is the olfactory nerve motor, sensory, or both?

<p>sensory</p> Signup and view all the answers

Is the optic nerve motor, sensory, or both?

<p>sensory</p> Signup and view all the answers

Is the oculomotor nerve motor, sensory, or both?

<p>both</p> Signup and view all the answers

Is the trochlear nerve motor, sensory, or both?

<p>motor</p> Signup and view all the answers

What type of nerve is the trigeminal nerve: motor, sensory, or both?

<p>both</p> Signup and view all the answers

What type of nerve is the abducens nerve: motor, sensory, or both?

<p>motor</p> Signup and view all the answers

What type of nerve is the facial nerve: motor, sensory, or both?

<p>both</p> Signup and view all the answers

What type of nerve is the acoustic nerve: motor, sensory, or both?

<p>sensory</p> Signup and view all the answers

What type of nerve is the glossopharyngeal nerve: motor, sensory, or both?

<p>both</p> Signup and view all the answers

What type of nerve is the spinal accessory nerve: motor, sensory, or both?

<p>motor</p> Signup and view all the answers

What type of nerve is the hypoglossal nerve: motor, sensory, or both?

<p>motor</p> Signup and view all the answers

Define the cervical spine

<p>C1-C8</p> Signup and view all the answers

Define the thoracic spine

<p>T1-T12</p> Signup and view all the answers

Define the lumbar spine

<p>L1-L5</p> Signup and view all the answers

Define the coccygeal spine

<p>coccyx (tailbone)</p> Signup and view all the answers

The neurological system is fully developed at birth

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

Flashcards

CNS Composition

Brain, spinal cord, and meninges.

Brain components

Cerebrum, diencephalon, brain stem, cerebellum.

Neurological System Structures

CNS, peripheral nervous system, autonomic nervous system.

Autonomic Nervous System parts

Sympathetic and parasympathetic.

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Sympathetic Nervous System

"Fight or flight" response.

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Parasympathetic Nervous System

"Rest and digest" state.

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Cranial Nerves

12 pairs.

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Spinal Nerves

31 pairs.

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Cerebrum Structure

Two hemispheres divided into four lobes.

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Cerebrum Lobes

Frontal, parietal, temporal, occipital.

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Voluntary Movement Control

Frontal lobe.

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Broca's Area Function

Speech production.

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Left Frontal Lobe Control

Right side.

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Right Frontal Lobe Control

Left side.

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Higher Cognitive Functions

Frontal lobe.

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Tactile Sensation Interpretation

Parietal lobe.

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Auditory Impulse Interpretation

Temporal lobe.

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Wernicke's Area Location

Temporal lobe.

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Wernicke's Area

Responsible for interpreting auditory stimuli.

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Reading and Understanding

Occipital lobe.

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Primary Visual Receptor Center

Occipital lobe.

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Diencephalon Components

Thalamus and hypothalamus.

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Emotion and Creativity

Thalamus.

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Body Function Regulation

Hypothalamus.

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Respiratory Function Regulation

Hypothalamus.

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Relay Station

Thalamus.

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Sex Drive Regulation

Hypothalamus.

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ANS Coordinator

Hypothalamus.

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Brain Stem Location

Between cerebral cortex and spinal cord.

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Brain Stem Composition

Nerve fibers.

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Brain Stem Parts

Midbrain, pons, medulla oblongata.

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Motor Neuron Location

Midbrain.

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Vital Autonomic Centers

Medulla oblongata.

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Connection Point

Midbrain.

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Respiratory Centers Location

Pons.

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Motor Fiber Crossing

Medulla oblongata.

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Cerebellum Location

Under the occipital lobe.

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Cerebellum Functions

Motor coordination, equilibrium, muscle tone.

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Positive Romberg's Test

Cerebellum issue.

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Posture/Pain Control Problems

Spinal cord.

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Anterolateral Tract

Sensations of pain, temperature, itch, and crude touch.

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Posterior Column

Sensations of position, vibration, and finely localized touch.

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Imprecise Localization

Anterolateral tract.

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Proprioception

Our sense of body position.

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Stereognosis

Finely localized touch.

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Object Differentiation

Posterior column.

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Sensory Pathways of CNS

  1. Anterolateral tract, 2. Posterior column.
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Motor Pathways of CNS

  1. Pyramidal (corticospinal) tract, 2. Extrapyramidal tract.
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Pyramidal (Corticospinal) Tracts

Mediate voluntary movement, particularly skilled, discrete purposeful movements.

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Writing Motor Pathway

Pyramidal (corticospinal) tract.

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Skilled, Discrete Movement

Writing.

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Study Notes

  • The neurological system comprises the CNS, peripheral nervous system, and autonomic nervous system.

CNS Composition

  • The central nervous system consists of the brain, spinal cord, and meninges.
  • The brain is composed of the cerebrum, diencephalon, brain stem, and cerebellum.

Autonomic Nervous System

  • The autonomic nervous system has two parts: sympathetic and parasympathetic.
  • Sympathetic response is "fight or flight".
  • Parasympathetic response is "rest and digest".

Nerve Pairs

  • There are 12 pairs of cranial nerves.
  • There are 31 pairs of spinal nerves.

Cerebrum

  • The cerebrum consists of two hemispheres divided into four lobes: frontal, parietal, temporal, and occipital.

Frontal Lobe

  • Controls voluntary movements and skeletal actions.
  • Contains the Broca area, which controls speech.
  • The left frontal lobe controls the right side of the body, and vice versa.
  • Controls talking and writing, emotions, intellect, reasoning, judgment, and behavior.

Parietal Lobe

  • Interprets tactile sensations, including touch, pain, temperature, shapes, and two-point discrimination.

Temporal Lobe

  • Receives and interprets impulses from the ear.
  • Contains Wernicke's area, which is responsible for interpreting auditory stimuli.

Occipital Lobe

  • Associated with reading and understanding.
  • It is the primary visual receptor center.

Diencephalon

  • Consists of the thalamus and hypothalamus.

Thalamus

  • Crucial to human emotion and creativity.
  • Functions as a relay station in the brain.

Hypothalamus

  • Crucial for regulating many body functions.
  • Regulates respiratory functions and sex drive.
  • Acts as the coordinator of ANS activity and stress response.

Brain Stem

  • Located between the cerebral cortex and spinal cord.
  • Consists mostly of nerve fibers.
  • The parts of the brain stem are the midbrain, pons, and medulla oblongata.

Midbrain

  • Contains many motor neurons and tracts.
  • Merges into the thalamus and hypothalamus.

Pons

  • Contains ascending sensory and descending motor tracts.
  • Has two respiratory centers that coordinate with the main respiratory center.

Medulla Oblongata

  • Contains vital autonomic centers, such as those for respiratory, heart, and GI function.
  • Crossing of motor fibers occurs here.

Cerebellum

  • Located under the occipital lobe.
  • Primary functions include motor coordination of voluntary movements, maintenance of equilibrium, and maintenance of muscle tone.
  • A positive Romberg's test may indicate a cerebellum issue.

Spinal Cord

  • Issues may cause problems controlling posture, urinating, and response to pain.

Sensory Pathways of the CNS

  • Anterolateral tract: sensations of pain, temperature, itch, and crude touch.
  • Posterior column: sensations of position, vibration, and finely localized touch.
  • With damage to the anterolateral tract, a person would not be able to precisely locate or say what something was when placed in their hand.
  • Proprioception refers to the sense of body position.
  • Stereognosis is finely localized touch.
  • Using the posterior column pathway, a person can differentiate an object placed in their hands with their eyes closed and identify it.

Motor Pathways of the CNS

  • Pyramidal (corticospinal) tract: mediates voluntary movement, particularly skilled, discrete, purposeful movements like writing.
  • Extrapyramidal tract: maintains muscle tone and controls body movements like walking.

Cranial Nerves

  • There are 12 cranial nerves originating from the brain, midbrain, and brainstem, named as follows:
    • I. Olfactory (sensory) - Sense of smell.
    • II. Optic (sensory) - Visual acuity.
    • III. Oculomotor (both) - Eye movements, pupil constriction.
    • IV. Trochlear (motor) - Eye movements.
    • V. Trigeminal (both) - Muscles of mastication, sensation of face/scalp.
    • VI. Abducens (motor) - Eye movements.
    • VII. Facial (both) - Facial muscles, taste.
    • VIII. Acoustic (sensory) - Hearing, equilibrium.
    • IX. Glossopharyngeal (both) - Gag reflex, taste.
    • X. Vagus (both) - Gag reflex, talking/swallowing, general sensation.
    • XI. Spinal Accessory (motor) - Trapezius/sternomastoid strength.
    • XII. Hypoglossal (motor) - Tongue movement.

Spinal Regions

  • Cervical spine: C1-C8.
  • Thoracic spine: T1-T12.
  • Lumbar spine: L1-L5.
  • Sacral spine: S1-S5.
  • Coccygeal spine: coccyx (tailbone).

Spinal Cord Nerves

  • Nerves enter and exit the spinal cord through roots.
  • Sensory afferent fibers enter through the dorsal root of the cord.
  • Motor efferent fibers exit through the anterior root of the cord.
  • The higher the spinal cord injury, the worse it is for breathing.

Neurological Considerations

  • Older Adults: Decreased taste, scent, ability to hear, ability to see, and an increase in tremors with movement.
  • Infants: Motor activity is controlled in the spinal cord and medulla, and the neuro system is not fully developed at birth.
  • Pregnant Women: The baby may compress the spinal cord, causing issues like tingling in the thigh, carpal tunnel syndrome, leg cramps, and dizziness.
  • Decreased cerebral blood flow causes dizziness and loss of balance.
  • Slower nerve conduction causes slower reaction time and decreased touch, pain, taste, and smell.
  • Older adults experience general atrophy with a steady loss of neuron structure in the brain and spinal cord.

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