cranial nerves and nuclei

Question 1

which are the somatic motor nerves?

Answer 1

III, IV, VI, XII

Question 2

which are the branchial arch motor nerves?

Answer 2

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

Question 3

Nucleus ambiguus?

Answer 3

a motor nucleus. lies behind the inferior olive.

includes the IX-glossopharyngeal nerves (stylopharyngeus) and X-vagus nerves (levator palati muscle)

Question 4

which are the visceral efferent branches of motor nerves?

Answer 4

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

Question 5

which cranial nerve is associated with edinger westfal motor nucleus?

Answer 5

III - oculomotor in the midbrain

Question 6

which cranial nerve is associated with superior salivatory motor nucleus?

Answer 6

VII - facial

Question 7

which cranial nerve is associated with inferior salivatory motor nucleus?

Answer 7

IX - glossopharyngeal

Question 8

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

Answer 8

dorsal motor nucleus of vagus

Question 9

visceral afferent (sensory) nerves?

Answer 9

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

Autonomic:
X (vagus), IX (glossopharyngeal)

Question 10

nucleus solitarus?

Answer 10

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).

Question 11

somatic sensory nerves?

Answer 11

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)

Question 12

special sensory nerves?

Answer 12

most lateral of sensory columns.

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

Question 13

What nerves does the nucleus solatarius host?

Answer 13

(TASTE)

The visceral afferent nerves.VII, IX, and X.

Question 14

What nerves does the nucleus ambiguus host?

Answer 14

Motor nerves IX and X.

Question 15

which cranial nerves exit via the supraorbital foramen?

Answer 15

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

Question 16

which cranial nerves exit via the auditory canal?

Answer 16

VII (facial) and VIII (vestibulocochlear)

Question 17

which cranial nerves exit via the jugular foramen?

Answer 17

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

Question 18

which cranial nerves exit via the hypoglossal foramen?

Answer 18

hypoglossal nerve XII

Question 19

how does the pupillary light reflex work?

Answer 19

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

Question 20

which 4 nuclei make up the trigeminal nucleus?

Answer 20

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

Question 21

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

Answer 21

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?)

Question 22

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

Answer 22

sensory afferent input from IX (glossopharyngeal) from pharynx.

Vagus motor efferents to pharynx.

Test of medullary function.