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17 Cards in this Set
- Front
- Back
Which cranial nerve emerges from the dorsal aspect of the brainstem? What else is unique about this nerve?
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*Trochlear (CN IV)
*it is also the only cranial nerve that decussates |
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Which nerves emerge from the medulla?
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*hypoglossal (CN XII)
*spinal accessory (CN XI) *vagus (CN X) *glossopharyngeal (CN IX) |
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Which cranial nerves emerge from the pons?
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*trigeminal (V)
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Which cranial nerves emerge from the mid-brain?
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*occulomotor (CN III)
*trochlear (CN IV) |
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Which nerves emerge from the crevice between the pons and medulla?
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*vestibulocochlear (CN VIII)
*facial nerve (CN VII) *abducens nerve (CN VI) |
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Which cranial nerve exits from between the olive and pyramid?
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Hypoglossal (CN XII)
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Which cranial nerve has a branch that enters the cranium through the foramen magnum and exits through the jugular foramen?
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Spinal accessory (CN XI)
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Which cranial nerves course through the superior orbital fissue?
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*occulomotor (CN III)
*trochear (CN IV) *ophthalmic division of trigeminal (CN V-1) *abducens nerve (CN VI) |
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Which cranial nerves are purely motor in function and what is the musculature supplied by each?
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*CN III - extraocular muscles
*CN IV - superior oblique *CN VI - lateral rectus *CN XI - trapezius, SCM *CN XII - muscles of the tongue |
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Damage to which cranial nerve causes ptosis?
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Occulomotor (CN III) which innervates the palpebral muscle. Note that ptosis can also be caused by damage to the sympathetic innervation of the superior tarsal plate.
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Which cranial nerves mediate the corneal reflex? What is a major clinical problem following loss of this reflex?
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*the sensory aspect is mediated by CN V, the motor aspect is mediated by CN VII
*corneal abrasion |
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Which cranial nerves carry sensation from the skin of the face and scalp?
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*CN V - skin of face and anterior half of the scalp
*CN VII, X, XI - skin of ear *C2 - posterior half of the scalp |
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Which cranial nerve carries information from the tip of the tongue about taste? About touch? About thermal events?
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*CN VII - taste from the anterior 2/3 of the tongue
*CN V - touch, pain, and temperature from the anterior 2/3 of the tongue |
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If the right hypoglossal nerve were damaged, to which side would the tongue deviate upon protrusion?
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It would deviate towards the side of the lesion - in this case, to the right.
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Hoarseness, deviation of the uvula, and difficulty swallowing are all signs of damage to which cranial nerve?
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Vagus (CN X)
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What test is used to assess the function of CN XI?
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The sppinal accessory nerve can be tested with the shoulder shrug and lateral rotation of the head.
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How do deficits produced by damage to CN VII along its intradural course compare with those resulting from damage distal to the stylomastoid foramen?
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*proximal lesions result in paralysis of facial muscles, loss of taste, and loss of lacrimation
*distal lesions result in paralysis of facial muscles only |