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anatomy lecture exam 2 > LECTURE 7 cranial nerves > Flashcards

LECTURE 7 cranial nerves Flashcards

1
Q

description of cranial nerves

A

12 pairs (I-XII), numbered anterior to posterior based on attachment to inferior surface of brain, exit cranial cavity through foramina in skull

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2
Q

mnemonic devise for remembering cranial nerve names

A

Oh Oh Oh To Touch And Feel Very Good Velvet Ah Heaven

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3
Q

names of cranial nerves in order

A

olfactory (I), optic (II), oculomotor (III), trochlear (IV), trigeminal (V), abducens (VI), facial (VII), vestibulocochlear (VIII), glossopharyngeal (IX), vagus (X), accessory (XI), hypoglossal (XII)

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4
Q

types of nerve fibers in cranial nerves

A

visual sensory (sensory innervation of viscera, special: taste), somatic sensory (sensory innervation of outer party of body, special: hearing, equilibrium, vision, smell), visceral motor (innervation of smooth and cardiac muscle, glands), somatic motor (innervation of skeletal muscles (except pharyngeal arch muscle)

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5
Q

mnemonic devise for remembering cranial nerve functions

A

Some Say Marry Money But My Brother Says Big Brains Matter Most (S=sensory, M=motor, B=both)

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6
Q

3 branches of trigeminal cranial nerve (V)

A

ophthalmic (V1), maxillary (V2), mandibular (V3)

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7
Q

foramina for olfactory nerve I

A

olfactory foramina on cribriform plate of ethmoid bone

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8
Q

foramina for optic nerve II

A

optic canal of sphenoid bone

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9
Q

foramina for oculomotor nerve III

A

superior orbital fissure of sphenoid bone

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10
Q

foramina for trochlear nerve IV

A

superior orbital fissure of sphenoid bone

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11
Q

foramina for ophthalmic nerve V1

A

enters superior orbital fissure of sphenoid bone, exits supraorbital foramen

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12
Q

foramina for maxillary nerve V2

A

enters foramen rotundum, inferior orbital fissure, exits infraorbital foramen

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13
Q

foramina for mandibular nerve V3

A

exits through foramen ovale, into mandibular foramen, exits mental foramen

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14
Q

foramina for abducens nerve VI

A

superior orbital fissure of sphenoid bone

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15
Q

foramina for facial nerve VII

A

internal acoustic meatus, stylomastoid foramen

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16
Q

foramina for vestibulocochlear nerve VII

A

internal acoustic meatus

17
Q

foramina for glossopharyngeal nerve IX

A

jugular foramen

18
Q

foramina for vagus nerve X

A

jugular foramen

19
Q

foramina for accessory nerve XI

A

jugular foramen, foramen magnum

20
Q

foramina for hypoglossal nerve XII

A

hypoglossal canal

21
Q

description of olfactory nerve

A

I, sensory nerve for smell, attaches to cerebrum (not brainstem), many nerve endings from 2 olfactory bulbs, pass through olfactory foramina in cribriform plate of ethmoid bone to olfactory receptors in roof of nasal cavity

22
Q

description of optic nerve

A

II, sensory for vision, attaches to diencephalon (not brainstem), enters orbit through optic canal (its own foramen) of sphenoid bone

23
Q

description of oculomotor nerve

A

III, motor to 4 of 6 extrinsic skeletal muscles of eye (SR, IR, MR, IO), parasympathetic to smooth muscles controlling pupil and lens of eye, attaches to midbrain (brainstem), enters orbit through superior orbital fissure of sphenoid bone

24
Q

description of throchlear nerve

A

IV, motor to SO skeletal muscle of eye, attaches to midbrain (brainstem), enters orbit through superior orbital fissure of sphenoid bone

25
Q

description of trigeminal nerve

A

V, both sensory and motor (considering all 3 branches), attaches to pons (brainstem), innervates most of the skin of the face

26
Q

description of ophthalmic nerve

A

V1; sensory for cornea, nasal mucosa, face skin (forehead, eyelids, some of nose); attaches to pons (brainstem); enters orbit through superior orbital fissure, then exits orbit through supraorbital foramen/notch

27
Q

description of maxillary nerve

A

V2; sensory for skin of face (cheeks, upper lips, up towards forehead), oral cavity, teeth; attaches to pons (brainstem); passes through foramen rotundum, inferior orbital fissure, then exits through infraorbital foramen

28
Q

description of mandibular nerve

A

V3; motor for muscles of mastication; sensory for face skin (chin and up sides of face), teeth, anterior 2/3 tongue (general); attaches to pons (brainstem); exits cranial cavity through foramen ovale into the mandibular foramen and out the mental foramen

29
Q

description of abducens nerve

A

VI, motor to LR skeletal muscle of eye (turns eye away from midline), attaches to pons (brainstem), enters orbit through superior orbital fissure of sphenoid bone

30
Q

description of facial nerve

A

VII; sensory to anterior 2/3 tongue for taste, motor to muscles of facial expression, parasympathetic to mandibular and sublingual glands and lacrimal gland; attaches to pons (brainstem); exits cranial cavity through internal acoustic meatus, then exits skull through stylomastoid foramen; made up of 5 branches that spread across face

31
Q

description of vestibulocochlear nerve

A

VIII, sensory to organs of hearing and equilibrium, attaches to pons (brainstem), enters inner ear through internal acoustic meatus

32
Q

description of glossopharyngeal nerve

A

IX; motor to stylopharyngeus muscle (pharyngeal constrictor), sensory to posterior 1/3 of tongue (general and taste) and pharynx, parasympathetic to parotid gland; attaches to medulla oblongata (brainstem); exits cranial cavity through jugular foramen

33
Q

description of vagus nerve

A

X; motor to pharynx and larynx, sensory to pharynx, larynx and abdominal organs, parasympathetic to thoracic and abdominal organs; attaches to medulla oblongata (brainstem); exits cranial cavity through jugular foramen; nicknamed the “wanderer” because its the only cranial nerve that runs caudal to the head and neck

34
Q

description of accessory nerve

A

XI, motor to trapezius and sternocleidomastoid musclese, attaches to medulla oblongata (brainstem), exits cranial cavity through jugular foramen, joined by a spinal segment passing into cranial cavity through foramen magnum

35
Q

description of hypoglossal nerve

A

XII, motor to tongue muscles, attaches to medulla oblongata (brainstem), exits cranial cavity through hypoglossal canal

36
Q

what cranial nerves provide parasympathetic innervation?

A

oculomotor (III), facial (VII), glossopharyngeal (IX), vagus (X)

37
Q

what nerves pass through superior orbital fissure?

A

oculomotor (III), trochlear (IV), ophthalmic (V1), abducens (VI)

38
Q

what nerves innervate the tongue?

A

mandibular (V3), facial (VII), glossopharyngeal (IX)

anatomy lecture exam 2 (12 decks)

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