Brainstem

Question 1

Midbrain cranial nerve attachment

Answer 1

•CN III, IV

Question 2

Pons cranial nerve attachment

Answer 2

•CN V, VI, VII, VIII

Question 3

Medulla cranial nerve attachment

Answer 3

CN IX, X, XI, XII

Question 4

Sensory nuclei functional groups

Answer 4

Special (vision, hearing, balance), somatic, visceral (taste, visceral),

Question 5

Motor nuclei functional groups

Answer 5

Parasympathetic, branchial (from pharyngeal arches in embryo), somatic

Question 6

Location of midbrain

Answer 6

• Located in tentorial notch
• Formed by folds of dura mater known as tentoriumcerebelli

Question 7

Answer 7

Question 8

Nuclei of CN III (oculomotor)

Answer 8

Oculomotor nucleus (somatic motor) and Edinger Westphal nucleus (parasympathetic)

Question 9

Nuclei of CN IV (trochlear)

Answer 9

Trochlear nucleus in caudal midbrain on dorsal side of brainstem

Question 10

Nuclei for CN V (trigeminal)

Answer 10

Trigeminal motor nucleus (medial since motor)

Principal (main or chief) trigeminal nucleus (lateral since sensory)

Question 11

CN VI nuclei

Answer 11

abducens nucleus in lower pons

Question 12

CN VII nuclei

Answer 12

facial motor nucleus in lower pons

Question 13

CN XII nucleus

Answer 13

Question 14

Nucleus of efferent axons in nerves IX and X

Answer 14

Nucleus ambiguus – swallowing and vocalization

Question 15

Nucleus that sends its fibers laterally into CN X

Answer 15

Dorsal motor nucleus of X – Preganglionic parasympathetic

Question 16

Tract lateral to nucleus ambiguus and function

Answer 16

Descending hypothalamo-spinal sympathetic tract

-Modulates the activity of neurons in the IML of the spinal cord

Question 17

Function of solitary nucleus (nucleus solitarius)

Answer 17

Elongated sensory nucleus in the medulla

Receives axons from nerves VII, IX, and X.

Conveys information about taste and visceral sensation.

Question 18

Vestibular nuclei function and CN exits

Answer 18

Found under the floor of the fourth ventricle, partly in the open medulla and partly in the pons.

CN VI and VII

Question 19

Hypoglossal nucleiu CN

Answer 19

CN XII

Question 20

Nucleus ambiguus CN

Answer 20

CN IX, X

Question 21

Dorsal motor nucleus of vagus CN

Answer 21

CN X

Question 22

Spinal trigeminal nucleus CN

Answer 22

CN V

Question 23

Vestibular nucleus CN

Answer 23

CN VIII

Question 24

Cochlear nucleus CN

Answer 24

CN VIII