NB18 Brainstem + cranial nerves

Question 1

describe neural tube cross-section :

Answer 1

dorsal part called basal laminar connected with alar lamina in ventral half, in a ring

Question 2

What does the basal lamina of the neural tube form in :

1) spinal cord
2) medulla

Answer 2

1) ventral horn

2) motor nuclei

Question 3

What does the alar lamina of the neural tube form in :

1) spinal cord
2) medulla

Answer 3

1) dorsal horn

2) sensory nuclei

Question 4

Which cranial nerves are parasympathetic?

Answer 4

3,7, 9 and 10

Question 5

Which cranial nerves are entirely sensory?

Answer 5

1,2 8

Question 6

Which cranial nerves are sensory and motor?

Answer 6

5, 7 , 9 , 10

Question 7

Which cranial nerves are entirely motor?

Answer 7

3, 4, 6,11, 12

Question 8

List the general somatic motor nuclei + site

Answer 8

1. nucleus of oculomotor (midbrain)
2. nucleus of trochlear (midbrain)
3. nucleus of abducent (pons)
4. nucleus of hypoglossal (medulla)

Question 9

Give the nucleus’ corresponding cranial nerve and function

1. nucleus of oculomotor (midbrain)
2. nucleus of trochlear (midbrain)
3. nucleus of abducent (pons)
4. nucleus of hypoglossal (medulla)

Answer 9

1. CN 3, sup. inf. and medial rectus, inferior oblique and levator palpebrae superioris
2. CN 4 superior oblique
3. CN 6 lateral rectus
4. CN 7 (All of the intrinsic and extrinsic muscles are innervated by the hypoglossal nerve (CN XII), except palatoglossus, which has vagal innervation (CN X).)

Question 10

List the special visceral motor nuclei:

Answer 10

1. motor nucleus of trigeminal nn. (pons)
2. nucleus of facial nn.(pons)
3. nucleus of ambiguous (medulla)

Question 11

Give the nucleus’ corresponding cranial nerve and function

1. motor nucleus of trigeminal nn. (pons)
2. nucleus of facial nn.(pons)
3. nucleus of ambiguous (medulla)

Answer 11

1. CN 5: muscles of mastication, tensor tympani, tensor palatine, mylohyoid, ant. belly of digastric
2. CN7: muscles of facial expression, post. belly of digastric, stylohyoid and stapedius
3. CN 9, 10 &11: skeletal mm of pharynx, larynx and soft palate

Question 12

List the general visceral motor nuclei:

Answer 12

1. Edinger-Westphal nucleus (midbrain)
2. Superior salivatory nucleus (pons)
3. inferior salivatory nucleus (medulla)
4. dorsal nucleus of vagus nn. (medulla)

Question 13

Give the nucleus’ corresponding cranial nerve and function

1. Edinger-Westphal nucleus (midbrain)
2. Superior salivatory nucleus (pons)
3. inferior salivatory nucleus (medulla)
4. dorsal nucleus of vagus nn. (medulla)

Answer 13

1. CN3: sphincter pupillae and ciliary mm
2. CN7: submandibular, sublingual and lacrimal glands
3. CN9: Parotid gland
4. CN10: many cervical, thoracic and abdominal viscera

Question 14

Give the visceral sensory nuclei (general +sensory ) :

Answer 14

nucleus of solitary tract (medulla)

Question 15

Give the nucleus’ corresponding cranial nerve and function

nucleus of solitary tract (medulla)

Answer 15

CN 7, 9 and 10

taste and visceral sensation

Question 16

List the special somatic sensory nuclei:

Answer 16

1. mesencephalic nucleus of trigeminal nn. (pons to midbrain)
2. Chief sensory nucleus of trigeminal nn. (pons)
3. Spinal nucleus of trigeminal nn. (pons to spinal level C3)

Question 17

Give the nucleus’ corresponding cranial nerve and function:

1. mesencephalic nucleus of trigeminal nn. (pons to midbrain)
2. Chief sensory nucleus of trigeminal nn. (pons)
3. Spinal nucleus of trigeminal nn. (pons to spinal level C3)

Answer 17

1. 2.3. CN 5
2. proprioception
3. fine touch on face
4. pain and temperature sensation of face