CN 7-12 Flashcards Preview

Anatomy > CN 7-12 > Flashcards

Flashcards in CN 7-12 Deck (31):
1

Where do all general somatic sensory fibers synapse?

Trigeminal complex

2

Where are preganglionic parasympathetic fibers?

Facial, glossopharyngeal, and vagus nerve

3

Where are preganglionic parasympathetic somata found?

pontine and medullary nuclei

4

What does CN 7 innervate?

Superficial mimetic facial muscles

5

Path of somatic motor neurons of the facial nerve

Leave pons in facial nerve thru temporal bone and middle ear cavity, exits via stylomandibular foramen, enters the parotid gland and divides into 5 branches

6

Muscles innervated by somatic motor neurons of facial nerve

Stapedius, stylohyoid, posterio belly of digastric, mimetic muscles

7

Greater Petrosal nerve path

From facial nerve at geniculate ganglion, pass anteriorly across the middle cranial fossa, enter pterygopalatine fossa, synapse in pterygopalatine ganglion

8

Parasympathetic greater petrosal nerve of the facial nerve innervate what?

Post-pterygopalatine ganglion fibers control secretion of the lacrimal gland/mucous glands of nasal cavity

9

Chorda tympani nerve path

Leaves middle ear cavity and joins lingual nerve in the infratemporal fossa, synapse with submandibular ganglion

10

Parasympathetic chorda tympani innervates what?

Postganglion control secretion from submandibular and sublingual salivary glands

11

Visceral sensation of taste to anterior 2/3rds of tongue is supplied by what?

Facial via ganglia in temporal bone. Fibers join chorda tympani in middle ear cavity, pass inferiorly into the infratemporal fossa to join the lingual nerve

12

Sensory to external auditory canal and ear and small area to oropharynx pathway

Sensory cell bodies are in geniculate ganglion

13

Cranial nerve 8

Vestibulocochlear nerve

14

Cranial nerve 9

Glossopharyngeal nerve

15

Somatic motor neurons in CN9

innervate stylopharyngeus

16

Parasympathetic of CN9

Diverge from CN9 at base of skull, enter/pass thru middle ear cavity, exit middle ear cavity as lesser petrosal nerve, synapse on otic ganglion (deep in infratemporal fossa). Postgang. Join auriculotemporal and innervate parotid

17

Somatic sensation of CN9

Supplies limited somatic sensation to posterior tongue/oropharyns/middle ear cavity

18

Taste sensation of CN9

Posterior 1/3 of tongue. Sensory cell bodies are in inferior ganglion near base of skull. Peripheral processes pass to posterior tongue, central processes synapse on rostral half of solitary nucleus

19

General viseral sensory info of CN9

O2 levels and BP from carotid artery. Sensory bodies are inferior ganglion of 9, peripheral fibers distribute to/synapse on receptors in carotic body/siphon. Central processes synapse on the caudal half of the solitary nucleus

20

Cranial nerve 10

Vagus nerve

21

Somatic motor neurons of CN10

Nucleus ambiguus, axons innervate most of pharynx and larynx

22

Parasympathetic innervation of CN10

Pregang cell bodies are in dorsal motor nucleus of 10 in medulla, pregang fibers pass in vagus nerve t o thorax and abdomen and synapse close to target organ

23

General viseral afferents of CN10

Info/function status of thoracic/abdominal organs. Sensory cell bodies are in inferior ganglion of 10, peripheral processes distribute with vagus nerve, central process synapse on cells in caudal solitary nucleus

24

General taste and sensation of CN10

Posterior tongue/adjacent pharyngeal wall. Sensory cell bodies are superior/inferior vagal ganglia, central processes synapse on cells in the trigeminal spinal nucelus/solitary nucleus

25

Symptoms of vagus nerve damage

Low/soft voice, aspirate fluids/food more easily, asymmetrical soft palate

26

Cranial nerve 11

Accessory nerve

27

Muscles innervated by CN11

Trapezius and sternocleidomastoid

28

Path out of the skull of CN11

Lateral surface of cervical cord, pass thru f. magnum into skull, leaves via jugular foramen

29

Cranial nerve 12

Hypoglossal nerve

30

Path of CN12

Exit thru hypoglossal canal, pass anteriorly to enter deep floor of mouth

31

Innervation of CN12

Intrinsic/extrinsic muscles of the tongue except palatoglossus