Neuro Exam 4.3

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brau2308
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216350
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Neuro Exam 4.3
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2013-04-28 16:28:29
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neurology neuroanatomy neuroscience
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review of neuro part 3 for exam 4
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  1. Which CN is the facial nerve?
    CN VII
  2. How many motor functions does the facial n have?
    2
  3. What does the facial nerve innervate?
    • mm of facial expression
    • submandibular, sublingual, and lacrimal glands
  4. What are considered the mm of facial expression?
    dilators and constrictors of mouth, orbits, and nasal apertures
  5. How is the part of the facial nerve that innervates mm of facial expression divided?
    into upper and lower halves
  6. Which tract are the UMNs of the facial nerve associated with?
    corticobulbar tract
  7. What type of input do the LMNs of the upper 1/2 of the facial nerve (that innervates mm of facial expression) receive?
    bilateral input from corticobulbar tract
  8. What do the LMNs of the upper 1/2 of the facial nerve (that innervates mm of facial expression) innervate?
    mm above a horizontal line across the eye orbit
  9. If damage occurs, does the upper 1/2 of the LMN of the facial nerve still work?
    usually b/c bilateral input
  10. What type of input do the LMNs of the lower 1/2 of the facial nerve (that innervates mm of facial expression) receive?
    unilateral input from corticobulbar tract
  11. What do the LMNs of the lower 1/2 of the facial nerve (that innervates mm of facial expression) innervate?
    mm below a horizontal line across the eye orbit
  12. If damage occurs, does the lower 1/2 of the LMN of the facial nerve still work?
    usually show paralysis b/c unilateral input, if injury to the contralateral side
  13. Where are the cell bodies of the LMNs of the facial n that innervate mm of facial expression?
    facial motor nucleus in tegmentum of pons
  14. What type of response is it when the facial nerve innervates the submandibular, sublingual, and lacrimal glands?
    parasympathetic
  15. Where are the preganglionic parasympathetic neurons of the facial nerve that innervates glands?
    salivatory nuclei in tegmentum of medulla (shared w/ CN IX)
  16. Where do the preganglionic parasympathetic neurons of the facial nerve that innervates glands synapse with postgang?
    submandibular and ptergopalatine ganglia
  17. What is innervated by the submandibular ganglia?
    submandibular gland and sublingal glands
  18. What is innervated by the pterygopalatine ganglia?
    lacrimal gland
  19. Is the part of the facial nerve that innervates the glands part of the corticobulbar tract?
    no
  20. Which CN is the glossopharyngeal nerve?
    CN IX
  21. How many motor functions does the glossopharyngeal nerve have?
    2
  22. What are the motor functions of the glossopharyngeal nerve?
    • innervates stylopharyngeaus m of the pharynx
    • innervates parotid gland
  23. What type of input does the part of the glossopharyngeal nerve that innervates the stylopharyngeus m receive?
    bilateral from corticobulbar tract
  24. Where are the cell bodies of LMN of glossopharyngeal nerve that innervate stylopharyngeus m?
    nucleus ambiguus in tegmentum of medulla
  25. Which CNs share the nucleus ambiguus?
    CN IX, X, XI
  26. What type of response is the innervation of the parotid gland by the glossopharyngeal nerve?
    parasympathetic
  27. Where are the preganglionic parasympathetic neurons of the glossopharyngeal nerve that innervate the parotid gland?
    salivatory nuclei in tegmentum of medulla
  28. Which CNs share the salivatory nuclei?
    CN IX and VII
  29. Where do the pregang parasympathetic neurons synapse with the postgang?
    otic ganglia (just behind parotid gland) in the neck
  30. Is the part of the glossopharyngeal nerve that innervates the parotid gland part of the corticobulbar tract?
    no
  31. Which CN is the vagus nerve?
    CN X
  32. How many motor functions does the vagus nerve have?
    2
  33. What are the motor functions of the vagus nerve?
    • innervates mm of larynx, pharynx, and soft palate
    • innervates viscera of thorax, abdomen, and pelvis
  34. What input does the vagus nerve that innervates the mm of larynx, pharynx, and soft palate receive?
    bilateral from corticobulbar tract
  35. Where are the cell bodies of LMN of vagus nerve that innervates mm of larynx, pharynx, and soft palate?
    nucleus ambiguus in tegmentum of medulla
  36. Which CNs share the nucleus ambiguus?
    CN X, IX, and XI
  37. What is viscera?
    smooth muscle
  38. What type of function is it when the vagus nerve innervates the viscera of thorax, abdomen, and pelvis?
    parasympathetic function
  39. Where do the pregagnlionic parasympathetic neurons of the bagus nerve that innervate the viscera originate?
    dorsal motor nucleus in tegmentum of medulla
  40. Which nerve does 90% of the parasympathetic activity in the body?
    vagus
  41. Where does the pregang parasym neuron of the vagus nerve that innervates viscera synapse with postgang?
    numerous ganglia located near the organ being innervated (usually behind the organ)
  42. Is the part of the vagus nerve that innervates the viscera involved with the corticobulbar tract?
    no, driven by hypothalamus
  43. Which CN is the spinal accessory nerve?
    CN XI
  44. What type of input does the spinal accessory nerve receive?
    bilateral from corticobulbar
  45. Where do the LMN of the spinal accessory nerve begin?
    2 separate nuclei
  46. What 2 separate nuclei do the LMN of the spinal accessory nerve begin in?
    • cervical portion
    • cranial portion
  47. In the cervical portion, where are the cell bodies of LMN of the spinal accessory nerve?
    spinal motor nucleus
  48. Where are the spinal motor nucleus of the cervical portion of the spinal accessory nerve located?
    rostral cervical regions of SC
  49. What does the cervical portion of the spinal accessory nerve innervate?
    sternocleidomastoid and trapezius
  50. Where are the cell bodies of LMN of cranial portion of the spinal accessory nerve?
    nucleus ambiguus
  51. Where are the nuclei of the cranial portion of the spinal accessory nerve located?
    tegmentum of medulla
  52. What does the cranial portion of the spinal accessory nerve innervate?
    intrinsic laryngeal mm
  53. Which CNs share the nucleus ambiguus?
    CN IX, X, and XI
  54. Which CN is the hypoglossal nerve?
    CN XII
  55. What type of input does the hypoglossal nerve receive?
    unilateral from corticobulbar tract
  56. Where are the cell bodies of LMN of hypoglossal nerve?
    hypoglossal motor nucleus in tegmentum of medulla
  57. What does the hypoglossal nerve innervate?
    extrinsic (move tongue around) and intrinsic (change tongue shape) mm of tongue via genioglossus m.

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