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Neuroanatomy > Buck Ch 1 Cranial Nerves > Flashcards

Buck Ch 1 Cranial Nerves Flashcards

1
Q

Name and Fiber Types:

CN I

A

Olfactory

SVA
Sensory

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2
Q

Name and Fiber Types:

CN II

A

Optic

SSA
Sensory

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3
Q

Name and Fiber Types:

CN III

A

Oculomotor

GSE, GVE-P
Motor

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4
Q

Name and Fiber Types:

CN IV

A

Trochlear

GSE
Motor

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5
Q

Name and Fiber Types:

CN V

A

Trigeminal

GSA, SVE
Motor and Sensory

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6
Q

Name and Fiber Types:

CN VI

A

Abducens

GSE
Motor

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7
Q

Name and Fiber Types:

CN VII

A

Facial

SVE, GSA, SVA, GVA, GVE-P
Motor and Sensory

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8
Q

Name and Fiber Types:

CN VIII

A

Acoustic

SSA, SSE
Sensory

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9
Q

Name and Fiber Types:

CN IX

A

Glossopharyngeal

SVE, GSA, SVA, GVA, GVE-P
Motor and Sensory

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10
Q

Name and Fiber Types:

CN X

A

Vagus

SVE, GSA, SVA, GVA, GVE-P
Motor and Sensory

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11
Q

Name and Fiber Types:

CN XI

A

Accessory

GSE
Motor

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12
Q

Name and Fiber Types:

CN XII

A

Hypoglossal

GSE
Motor

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13
Q

CN containing GSA fibers

A

V, VII, IX, X

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14
Q

CN containing GSE fibers

A

III, IV, VI, XI, XII

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15
Q

CN containing GVA fibers

A

VII, IX, X

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16
Q

CN containing GVE fibers

A

III, XII, IX, X

17
Q

CN containing SVA fibers

A

I, VII, IX, X

18
Q

CN containing SVE fibers

A

V, VII, IX, X

19
Q

CN containing SSA fibers

A

II, VIII

20
Q

CN containing SSE fibers

A

VIII

21
Q

Special Somatic Afferent (SSA)

A

Ear and Eye

hearing, vision, equilibrium

22
Q

Special Visceral Afferent (SVA)

A

Specialized fibers for Oldfactory (smell) and Gustatory (taste)

Visceral - bc functional association with the digestive tract; activates secretion of digestive juices

23
Q

General Somatic Efferent (GSE)

A

Fibers carrying motor impulses to skeletal muscle

Paired with GSA fibers

24
Q

General Visceral Efferent (GVE)

A

Autonomic Fibers innervating smooth muscle of the GUT tube, blood vessels and cardiac muscle and that regulate glandular secretion

Sympathetic and Parasympathetic divisions

Found in spinal nerves and some cranial nerves; includes splanchnics

Paired with GVA

25
Q

Special Visceral Efferent (SVE)

A

Nerves innervating skeletal muscles derived from the visceral (branchiomeric/pharyngeal) arch of mesoderm which includes muscles of mastication, facial expression, pharynx, palate and larynx.

Nothing to do with autonomics (viscera)

26
Q

Special Somatic Efferent (SSE) - not tested by buck

A

Nerve fibers that allow you to make out/distinguish sounds from noise

27
Q

There are ___ sympathetic ganglia in the head; there are __ sympathetic cranial nerves in the brain.

A

No, no

28
Q

How do sympathetics enter the brain?

A

Sympathetic chain and following arteries

29
Q

There are ____ parasympathetic cranial nerves

A

4 –> CN III, VII, IX, X

30
Q

Function:

CN I

A

SVA

Sense of smell; causes reflex salivation and increased gastric motility

31
Q

Function:

CN II

A

SSA

Afferent fibers of the retina; primary receptors for sense of sight

32
Q

Function:

CN III

A

GSE = motor component innervating extra-ocular muscles of the eye assisting with rotational movement of the globe

GVE-P = parasympathetic innervation of intra-ocular muscles of the eye responsible for changing the shape of the lens for accommodation (focusing on near and far objects) and narrowing of the pupil; done via inferior division of CN III and the ciliary ganglion

33
Q

Function:

CN IV

A

GSE

innervation of superior oblique (extra-ocular eye muscle) - moves eye down and out; muscle uses a pulley to carry out its action

34
Q

Function:

CN V

A

GSA = major sensory nerve of the head; innervates portion of the scalp, most of the face, all conjunctiva, epithelium of nasal cavity, paranasal sinuses and oral cavity, skin of the outer ear, external auditory meatus, external surface of the tympanic membrane and cranial dural matter. Also provides proprioceptive fiber to ALL skeletal muscles of the head; V1, V2, V3

SVE = motor innervation to skeletal muscles of the pharyngeal arch origin, specifically the first arch; muscles of mastication, mylohyoid, anterior belly of the digastric m, tensor veli palatini, and tensor tympani muscles; only V3

Carrier of GVE-P fibers for CN III, VII, IX, and distributes these fibers to smooth muscle of the eye (iris and ciliary muscles) and the glands of the head: mucous, salivary and lacrimal

35
Q

Function:

CN VI

A

GSE

innervation of lateral rectus (extra ocular eye muscle) - abducts the eyes (hence the name abducens)

36
Q

Function:

CN VII

A

SVE = motor innervation to skeletal muscles of the second pharyngeal arch origin- muscles of facial expression, stylohyloid, posterior belly of the digastric muscle, and stapedius

GSA = skin sensory of the external ear and external auditory meatus

SVA = taste for the anterior 2/3 of the tongue via chorda typmani

GVA = sensory to the uppermost portion of the pharynx

GVA-P = parasympathetics to the lacrimal gland, nasal, palatal, oral, and pharyngeal mucous glands via GREATER PETROSAL NERVE and the PTERYGOPALATINE GANGLION; also to the submandibular salivary glands via CHORDA TYMPANI and the SUBMANDIBULAR GANGLION

37
Q

Function:

CN VIII

A

SSA = (1) afferent fibers from organ or corti –> sense of hearing (2) afferent fibers from the semicircular cannals, utricle and saccule of the internal ear –> sense of equilibrium

SSE = motor fibers related to modifying auditory input

38
Q

Function:

CN IX

A

SVE = motor innervation to skeletal muscles originating from the third pharyngeal arch- stylopharyngeus

GSA = sensory - skin of the external ear

SVA = taste - posterior 1/3 of tongue

GVA = sensory - epithelium of endodermal origin which lines the majority of the pharynx from the base of the skull to the laryngeal aditus, eustacian tube, middle ear, internal surface of the tympanic membrane, mastoid air cells, tonsils, posterior third of tongue, parotid gland and carotid sinus

GVE-P = secretory fibers of the to the parotid salivary glands via the LESSER PETROSAL NERVE and OTIC GANGLION

39
Q

Function:

CN X

A

SVE

Neuroanatomy (2 decks)

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