cranial nerves and nuclei Flashcards Preview

MD2- Neuroscience Block > cranial nerves and nuclei > Flashcards

Flashcards in cranial nerves and nuclei Deck (22):
1

which are the somatic motor nerves?

III, IV, VI, XII

2

which are the branchial arch motor nerves?

V (mandibular division), VII (Facial), IX (glossopharyngeal), X (vagus)

3

Nucleus ambiguus?

a motor nucleus. lies behind the inferior olive.
includes the IX-glossopharyngeal nerves (stylopharyngeus) and X-vagus nerves (levator palati muscle)

4

which are the visceral efferent branches of motor nerves?

III (oculomotor), VII (Facial), IX (glossopharyngeal), and X (vagus)

5

which cranial nerve is associated with edinger westfal motor nucleus?

III - oculomotor in the midbrain

6

which cranial nerve is associated with superior salivatory motor nucleus?

VII - facial

7

which cranial nerve is associated with inferior salivatory motor nucleus?

IX - glossopharyngeal

8

which motor brainstem nuclei is the X-vagus nerve associated with?

dorsal motor nucleus of vagus

9

visceral afferent (sensory) nerves?

One nucleus input from
Taste:
VII (Facial), IX (glossopharyngeal), X (vagus)

Autonomic:
X (vagus), IX (glossopharyngeal)

10

nucleus solitarus?

extends from pons to level of gracile nucleus in medulla.

-rostral gustatory nucleus receives afferents from 7,9, 10

-caudal visceral sensory division receives 9 (baroreceptors and chemoreceptors from carotid sinus), and 10 (afferents from heart and abdominal viscera).

11

somatic sensory nerves?

Middle column of lateral sensory tracts.

Sensation from V-trigeminal (face, forehead, mucosa of nose and mouth, cranial dura)

VII, IX, and X (skin behind hear and lining of external auditory meatus)

12

special sensory nerves?

most lateral of sensory columns.

sensation from I (olfactory, smell), II (optic, vision), and VIII (vestibulocochlear, hearing and equilibrium).

13

What nerves does the nucleus solatarius host?

(TASTE)
The visceral afferent nerves.VII, IX, and X.

14

What nerves does the nucleus ambiguus host?

Motor nerves IX and X.

15

which cranial nerves exit via the supraorbital foramen?

III, IV, V-1 (opthalmic divison), VI

16

which cranial nerves exit via the auditory canal?

VII (facial) and VIII (vestibulocochlear)

17

which cranial nerves exit via the jugular foramen?

IX (glossopharyngeal), X (vagus), XI (accessory)

18

which cranial nerves exit via the hypoglossal foramen?

hypoglossal nerve XII

19

how does the pupillary light reflex work?

sensory input from retina to brain via CN II. PS motor fibres from edinger-westfal nucleus in midbrain innervate sphincter pupillae muscle.

20

which 4 nuclei make up the trigeminal nucleus?

1.mesencephalic
2.chief sensory nucleus
3.spinal trigeminal nucleus (STN)
4. Motor nucleus

21

how does corneal blink reflex work? What does this test?

sensory afferents to brainstem via V-1 (opthalmic division of trigeminal).

Motor outputs to eyelid (orbicularis oculi) via VII (facial)

-->test of Pontine function (lesion in the pons?)

22

how does the gag reflex work? what does it test?

sensory afferent input from IX (glossopharyngeal) from pharynx.

Vagus motor efferents to pharynx.

Test of medullary function.