Exam 2 General info. on brainstem nuclei

Question 1

Edinger Westphal nucleus- Parasympathetic control of ciliary & pupillary constrictor smooth muscles of the eye
C.N III

Answer 1

Accessory Oculomotor (Lower motor neuron)

Question 2

Somatic motor muscle control for 4 of the 6 extraocular eye muscles & upper eyelid (levator palperbrae superioiris)

Answer 2

Oculomotor Nuclei (Lowe motor neuron) C.N III

Question 3

Somatic motor muscle control for the superior oblique extraocular eye muscle. (moves eyeball)

Answer 3

Trochlear Nucleus (Lower motor neuron)

Question 4

Proprioception from muscles of mastication & perhaps periodontial ligaments of the teeth

• Sensory function
• Nucleus of termination
• C. N. V

Answer 4

Trigeminal Mesencephalic Nucleus

Question 5

Somatic motor to muscles of mastication. Also tensor villi palatini, tensor tympani, anterior belly of digastric & mylohyoid m.

Answer 5

Trigeminal Motor Nucleus

Question 6

Somatic motor muscle control for the lateral Rectus extraocular eye muscle. C.N. VI

Answer 6

Abducens Nucleus

Question 7

Most superficial somatic motor muscles of the scalp & face (muscles of facial expression). Include the posterior belly of the digastric m. & the platysma m.

Answer 7

Facial Nucleus

Question 8

Parasympathetic control of lacrimal (tear) glands, submandibular & sublingual salivary glands.

Answer 8

Superior Salivatory Nucleus

Question 9

Parasympathetic control of parotid salivary gland.

Answer 9

Inferior Salivatory Nucleus

Question 10

Equilibrium & hearing, respectively. These nuclei are complex & subdivided into parts.

Answer 10

Vestibular & cochlear nuclei
Nucleus of termination
Sensory function
C.N VIII on each side

Question 11

Somatic motor muscle control for 16 of 18 named tongue muscles.
LMN
Nucleus of origin

Answer 11

Hypoglossal Nucleus

Question 12

Sensory & motor (parasympathetic) of organs supplied such as voice, heart, lung, & intestines in C.N X

Answer 12

Dorsal Nucleus of Vagus

Question 13

Nerves IX, X, XI all share this nucleus in delivery of visceral efferent (motor) fibers to the pharynx musculature

Answer 13

Nucleus ambiguus

Question 14

Sensory reception via the VII, IX, X C.N primarily dealing with taste from the tongue, palate & pharynx

• Nucleus of termination
• Preganglionic parasympathic neurons

Answer 14

Nucleus Solitarius

Question 15

AKA: Nucleus of the spinal trigeminal tract.
The main sensory reception nucleus for the face dealing with pain, thermal, discrimative tactile & proprioception. The caudal section extends down to the C3-4 cord levels.
C.N VII, IX, X also contribute here.

Answer 15

Spinal trigeminal nucleus

Nucleus of termination

Question 16

Somatic motor nucleus for movement of the important neck/ head muscles called the sternocleidomastoids & trapezius. Most fibers originate in the upper 5 cervical cord levels & lower M.O.

Answer 16

Spinal Accessory nucleus

Question 17

Where cranial nerve appears to be attached to the surface of the CNS (e.g The trigeminal nerves’ _______ origin is out of the side of the pons )

Answer 17

Apparent Origin

Question 18

The nucleus or nuclei that contribute motor fibers to the cranial nerve(s). These are located inside the CNS (e.g. the hypoglossal nucleus for CN XII is located inside the M.O.

Answer 18

Nucleus of origin

Question 19

Nucleus or nuclei that receive incoming AFFERENT input from the cranial nerve(s). These are also located inside the CNS (e.g. the solitary nucleus of the M.O. which serves as a taste reception center for C.N.’s VII, IX, & X

Answer 19

Nucleus of termination