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KIN 301 > Cranial nerve innervations > Flashcards

Cranial nerve innervations Flashcards

1
Q

What does CN I innervate?

A

visceral afferents - sense of smell

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2
Q

What does CN II innervate?

A

somatic afferents - sense of sight

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3
Q

What does CN III innervate?

A

somatic efferents - 4 of 6 ocular muscles (superior rectus, inferior rectus, medial rectus, inferior oblique), levator pulpebrae
visceral efferents - pupillary constrictor muscle (can cause blown pupil if damaged)

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4
Q

What does CN IV innervate?

A

somatic efferents - superior oblique

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5
Q

What are the divisions of CN V?

A

Ophthalmic (S), maxillary (S), mandibular (B)

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6
Q

What does CN V1 innervate?

A

somatic afferents - skin of face above eye
visceral afferents - cornea - causes corneal reflex with CN III and CN VI when something touches cornea

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7
Q

What does CN V2 innervate?

A

somatic afferents - skin of face below eye to upper teeth

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8
Q

What does CN V3 innervate?

A

somatic afferents - skin of face on mandible
somatic efferents - muscles of mastication

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9
Q

What does CN VI innervate?

A

somatic efferents - lateral rectus - synapses with oculomotor to coordinate eye movements (left and right)

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10
Q

What does CN VII innervate?

A

somatic efferents - muscles of facial expression
visceral efferents - lacrimal glands (tears), nasal mucosa (mucus), submandibular glands (saliva)
visceral afferents - taste on tongue (anterior 2/3)
somatic afferents - external ear + skin around

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11
Q

What does CN VIII innervate?

A

somatic afferents - hearing, balance (semi circular canals)

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12
Q

What does CN IX innervate?

A

visceral efferents - parotid gland (salivation)
visceral afferents - taste (posterior 1/3 of tongue)
somatic afferents - tongue, soft palate (sensation of touch)
somatic efferents - pharyngeal constrictors (muscles that swallow - motor portion of gag reflex)

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13
Q

What does CN X innervate?

A

visceral efferents - entire gut (action of digestion, also heart)
visceral afferents - entire gut, carotid body
somatic efferents - vocal folds
somatic afferents - touch/pressure @ back of throat/mouth (epiglottis)

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14
Q

What does CN XI innervate?

A

somatic efferents - SCM, traps

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15
Q

What does CN XII innervate?

A

somatic efferent - tongue

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KIN 301 (4 decks)

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