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5 Written questions

5 Matching questions

  1. What divides the anterior, medial, and posterior cranial fossa?
  2. What are the structures of the:
    1. anterior base of the skull
    2. medial base of the skull
    3. posterior base of the skull
  3. What specific muscles of the eye are controlled by the abducent nerve (CNVI) and the trochlear nerve (CNIV)
  4. Explain the peripheral pathway of the CNVIII- Vestibulocochlear nerve.
  5. What is the difference between the optic nerve and the optic track? How does crossing work in the nerves of the optic nerve.
  1. a Sphenoid ridge- Anterior from medial
    Petrous ridge- medial from posterior
  2. b Optic Nerve: eye to chiasm
    Optic Tract: chiasm to brain
    Nasal portion nerves cross in chiasm while the lateral portions do not. Thus left field processed by right side of the brain and vice-versa.
  3. c Abducent- Lateral rectus
    Trochlear- Superior oblique
  4. d 1. cribiform plate with holes for the olfactory nerve
    2. Carotid canal, foramen ovale
    3. Magnum foramen, internal accousti meatus, jugular foramen
  5. e 1. Cochlear (for hearing) in the spiral part of the middle ear goes to the spiral ganglion (cell bodies)
    2. Vestibular (balance) in the vestibular appartus goes to the vestibular ganglion (cell bodies)
    Axons from both of these converge to leave middle ear to the brain.

5 Multiple choice questions

  1. Sensory- glossopharngeal
    Motor- vagus
  2. Adduction: Medial, Superior, Inferior rectus
    Abduction: Lateral, superior, inferior obliques
  3. CN 7 and CN 8 (Facial and vestibulacoclear) leave the skull.
  4. Receptors in the nose travel to the cell bodies in the olfactory bulb that sits on the cribiform plate of the ethmoid bone. Here axons continue to the brain.
  5. Opening- Levator palpebrae superioris
    Closing- orbicularis oculi

5 True/False questions

  1. What is the role of the geniculate ganglion?It is the sensory ganglion for taste from the facial nerve (through the lingual nerve).


  2. What are the parasympathetic ganglions in the face?COPS:
    Ciliary (III), Otic (IX), Pterygopalatine (VII), Submandibular (VII).


  3. Explain the function of the pterygopalatine ganglion.Behind maxiallary sinus. Postganglionic sympathics from greater petrosal nerve (facial) for parasympth. of nasal/lacramal/palatine glands. also branches of the trigeminal


  4. Explain how taste occurs.Where the jugular vein leaves as well as CN 9, 10, 11. (Vagus, glosspharngeal, accessory).


  5. Explain where the trigeminal nerve exits externally.Down posterior through superior saggital sinus of the falx cerebri. then through the transverse sinus of the tentorium cerebelli. then to the internal jugular vein.


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