APcp13checkpoints

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Author:
crsegers
ID:
117001
Filename:
APcp13checkpoints
Updated:
2011-11-16 19:09:56
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Spinal cord
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Description:
Spinal Cord, spinal nerves, and spinal reflexes
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  1. Name the components of the central nervous system and the peripheral nervous system
    • CNS: Brain and spinal Cord
    • PNS: cranial nerves and spinal nerves
  2. Define spinal reflex
    A rapid, automatic response triggered by specific stimuli
  3. Identify the three spinal meninges.
    Dura mater, arachnoid mater, pia mater
  4. Damage to which root of a spinal nerve would interfere with motor function
    -Ventral root of a spinal nerve, which is composed of both visceral an dsomatic motor fibers
  5. Where is the cerebrospinal fluid that surrounds the spinal cord located
    Subarachnoid space, which lies beneath the epithelium of the arachnoid matter and superfucial to the pia mater
  6. Differentiate between sensory nuclei and motor nuclei
    Sensory nuclei receive and relay sensory info from peripheral receptors. Motor nuclei issue motor commands to peripheral effectors
  7. A person with polio has lost the use of his leg muscles. In which area of his spinal cord would you expect the virus-infected motor neurons to be
    in the anteriour gray horns of the spinal cord, where the cell bodies of somatic motor neurons are located
  8. A disease that damages myelin sheaths would affect which portion of the spinal cord?
    columns, because they are composed of bundles of myelinated axons
  9. Identify the major networks of nerves known as plexuses
    cervical, brachial, lumbar, sacral and coccygeal
  10. An anesthetic blocks the function of the dorsal rami of the cervical spinal nerves. Which areas of the body will be affected?
    skin and muscles of the back of the neck and the shoulders
  11. Injury to which of the nerve plexuses would interfere with the ability to breathe.
    Cervical plexus -more specificallly phrenic nerves- which originate in this plexus and innervate the diaphragm
  12. Compression of which nerve produces the sensation that your leg has "fallen asleep"
    sciatic nerve
  13. Neuronal pool
    the functional group of interconnected neurons organized within the CNS
  14. List the five circuit patterns found in neuronal pools
    divergence, convergence, serial processing, parallel processing, and reverberation
  15. Reflex
    a rapid, automatic response to a specific stimulus. Important in homeostasis
  16. What is the minimum number of neurons in a reflex arc?
    two. One must be a sensory that brings and the other a motor neuron that transmits to the effector
  17. One of the first somatic reflexes to develop is the suckling reflex. What type of reflex is this?
    Innate
  18. Identify the basic characteristics of polysynaptic reflexes
    • All involve pools of interneurons
    • Are intersegmental in distribution
    • involve reciprocal inhibition
  19. For the patellar (knee jerk) reflex, how would the stimulation of the muscle spindle by gamma motor neurons affect the speed of the reflex
    • The muscle spindles become more sensitive,
    • reflex would appear more quickly
  20. A weight lifter is straining to lift a 200-kg barbell above his head. Shortly after he lifts it to chest height, his muscles appear to relax and he drops the barbell. Which reflex has occurred.
    tendon reflex
  21. During a withdrawal reflex of the foot, what happens to the limb on the side opposite the stimulus? What is this response called?
    The limb on the opposite side is extended, called cross extensor reflex

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