Exam 2: Trigeminal Nerve

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Exam 2: Trigeminal Nerve
2012-06-28 14:32:09
anatomy trigeminal nerve

review of 6/28 lecture on trigeminal nerve for exam 2
Show Answers:

  1. Which cranial nerve is the trigeminal nerve?
    CN V
  2. Where does the trigeminal nerve originate?
    from pons of brain stem and anteriorly to trigeminal cave
  3. Where is the trigeminal cave?
    in the middle cranial fossa and surrounded by dura
  4. What is contained within the trigeminal cave?
    semilunar (sensory) ganglion of trigeminal nerve
  5. What divisions arise from the semilunar ganglion of the trigeminal nerve?
    • ophthalmic (V1)
    • maxillar (V2) 
    • mandibular (V3) 
  6. The manibular division of the trigeminal nerve is accompanied by what?
    motor component of trigeminal nerve
  7. What does the motor component of the trigeminal nerve innervate?
    eight pairs of muscles
  8. Each of the three divisions of CN V supplies a sensory branch to where?
    • cranial dura (meningeal branches)
    • sensory component to autonomic ganglion  
  9. Which nerve division is the superior and smallest of the three divisions of trigeminal N?
  10. What types of fibers does the ophthalmic division have? (motor or sensory?)
  11. What does the opthalmic division supply?
    eyeball, lacrimal gland and conjunctiva, part of nasal mucosa and skin of nose, eyelids, forehead and part of scalp
  12. The opthalmic division sends which branch to the tentorium cerebelli?
    meningeal branch
  13. The ophthalmic division continues anteriorly through with bony structure?
    superior orbital fissue 
  14. After passing through the superior orbital fissue, what does the ophthalmic division enter?
    bony orbit
  15. What are the branches of the ophthalmic division of the trigeminal n?
    • lacrimal
    • frontal  
    • nasociliary
  17. Because the branches of the trigeminal go to dura mater they are called:
    meningeal branches
  18. CN V detects pain (irritation) in what part of the body?
  19. Where are the sensory cell bodies of all the divisions of the trigeminal nerve located?
    semilunar ganglion
  20. Where are motor cell bodies of the mandibular division of the trigeminal stored?
    in the motor nucleus in the brain stem
  21. What types of fibers does the maxillary division have? (sensory or motor?)
  22. Where do branches of the maxillary division go to?
    nose, skin, and mucosa of cheek and upper lip, maxillary teeth and palate
  23. Where does the maxillary division travel?
  24. Where does the maxillary division exit the skull?
    foramen rotundum
  25. What bony structure does the maxillary division pass through?
    pterygopalatine fossa and infratemporal fossa
  26. After passing through the pterygopalatine fossa and infratemporal fossa the maxillary division enters where?
    inferior orbital fissue
  27. When the maxillary division enters the inferior orbital fissure, what is it then called?
    infraorbital nerve
  28. The infraorbital nerve traverses what to gain access to the face?
    infraorbital groove and canal
  29. The infraorbital nerve emerges from which foramen?
    infraorbital foramen
  30. Which division of the trigeminal nerve is the largest?
    mandibular division
  31. What types of fibers does the mandibular divsion of the trigeminal nerve have? (motor or sensory)
    both motor and sensory
  32. What does the sensory component of the mandibular division supply?
    mandibular teeth and gums, skin of temporal region, part of auricle, lower lip, lower part of face, and anterior 2/3 of tongue
  33. What do the motor fibers of the mandibular divison innervate?
    • four mm. of mastication
    • tensor mm. of palate and tympanic membrane
    • mylohyoid and anterior belly of digastric in floor of mouth   
  34. Where does the mandibular division of the trigeminal exit the skull?
    via foramen ovale
  35. Once the mandibular division of the trigeminal nerve exits the skull via the foramen ovale, what does it enter?
    infratemporal fossa
  36. How many branches does the trunk of the mandibular division give off before it divides into anterior and posterior divisions?
  37. Lingual nerve is a branch of the posterior division of:
    the mandibular division of CN V
  38. Which nerve joins up (hitches a ride) with the lingual nerve?
    chorda tympani nerve
  39. Chorda tympani is a branch of what?
    facial nerve
  40. What does the chorda tympani nerve contain?
    preganglionic parasympathetic fibers
  41. The preganglionic parasympathetic fibers of the chorda tympani nerve are destined for what?
    submandibular ganglion
  42. What do the postganglionic fibers arising from the submandibular ganglion innervate?
    submandibular and sublingual glands
  43. The chorda typmani nerve contains special sensory fibers for what?
    taste from anterior 2/3 of tongue
  44. The general sensory fibers contained in the lingual nerve supply what?
    anterior 2/3 of tongue and adjacent gums