Cranial Nerves Flashcards Preview

Neurology > Cranial Nerves > Flashcards

Flashcards in Cranial Nerves Deck (31):
1

Motor function

Have cell bodies in basal plate of brainstem and axons which leave CNS to innervate skeletal muscle somatic efferent or smooth muscle visceral efferent

Skeletal muscle of jaws and throat from branchial arches (visceral)

2

General somatic afferent

Trigeminal, facial, glossopharyngeal and vagus

3

Special somatic afferent

Optic and vestibulocochlear

4

General visceral afferent

Facial, glossopharyngeal and vagus

5

Special visceral afferent

Olfactory, facial, glossopharyngeal, vagus

6

General somatic efferent

Oculomotor, trochlear, abducens, hypoglossal

7

General visceral efferent

Oculomotor, facial, glossopharyngeal, vagus

8

Special visceral efferent

Trigeminal, facial, glossopharyngeal, vagus, spinal accessory

9

Nucleus ambiguous

IX, X, XI

10

Salivatory nucleus

VII, IX

11

Nucleus Solitarius

VII, IX, X

12

Olfactory nerve

CN I

bundles synapse in olfactory bulb and then relay to the brain

Olfactory bulb to the olfactory peduncles

13

Special

Branchial arches

V, VII, IX, X, XI

14

Placode derivation

Olfactory and vestibulocochlear

15

Cranial nerves and brain derivatives

Optic

16

Extraocular muscles

Oculomotor, trochlear, abducens

17

Tongue muscles

Hypoglossal

18

Parasympathetic

Vagus, oculomotor, facial and glossopharyngeal

19

Optic nerve

II

Cells converge towards optic disc, axons pass the sclera and exit the eyeball as optic nerve

Optic nerves join at optic chiasm then continue through optic tract around cerebral peduncles to synapse in 3 places

20

Optic nerve synapses

Lateral geniculate nucleus- visual cortex

Superior colliculus- startle reflex

Pretectal area-papillary light reflex

21

Occulomotor

III

innervate all but retractor bulbi, dorsal oblique, and lateral rectus

Also sphincter for iris and lens accommodation, synapse in ciliary ganglion

Coordination with muscles achieved by medial longitudinal fasciculus

22

Trochlear nerve

Only cranial nerve to exit brainstem from dorsal surface

CN IV

23

Trigeminal

Ophthalmic: orbital fissure, mandibullar- oval fora open, maxillary- round foramen

CN V

24

Three sensory components of trigeminal

Mesencephalic, principal trigeminal, and nucleus of spinal tract

25

Abducens

CN VI

Lateral rectus and retractor bulbi

Motor nucleus in the pons

Nerve runs through trapezoid body and emerges lateral to the pyramidal tract, forms facial colliculus

26

Facial nerve

CN VII

internal auditory meatus to the tympani occipital fissure

Pterygopalatine ganglion- parasympathetic

27

Vestibulocochlear

CN VIII

sensory receptors in cochlea and vestibular to semicircular canals

28

Glossopharyngeal nerve

CN IX

Motor to pharyngeal muscles and sensory to chemoreceptors and baroreceptors along with taste

29

Vagus

X

through jugular foramen and tympani occipital fissure

Right vagus goes posterior and left to esophageal plexus

Motor to palate and pharyngeal muscles

30

Accessory Nerve

Spinal XI

part of ventral horn

31

Hypoglossal Nerve

CN XII

tongue muscles