2. CNs and Autonomics

Question 1

All sympathetic fibers are (1) ___ arising from the (2) ____.

Answer 1

1. post-ganglionic
2. superior cervical ganglion of sympathetic trunk

Question 2

How do the sympathetic fibers travel?

Answer 2

on vessels to structures they innervate

Question 3

What is the only nerve that is post-ganglionic sympathetic?

Answer 3

deep petrosal nerve

Question 4

Where do pre-ganglionic parasympathetic fibers arise?

Answer 4

nuclei in the brain stem

Question 5

Where do pre-ganglionic parasympathetic fibers synapse?

Answer 5

4 ganglia in the head = ciliary, pterygopalatine, otic, and submandibular

Question 6

How are pre-ganglionic parasympathetics carried?

Answer 6

CN III, VII, IX, X

Question 7

All post-ganglionic fibers“piggy back” on branch of the _____ n. to arrive at the structure that they innervate.

Answer 7

trigeminal n.

Question 8

Primary function of CN: olfactory

(sensory, somatic, and/or parasympathetic)

Answer 8

sensory: olfaction

Question 9

Primary function of CN: optic

(sensory, somatic, and/or parasympathetic)

Answer 9

sensory: vision

Question 10

Function of trochlear n.

Answer 10

somatic: superior oblique eye m.

Question 11

Divisions of the trigeminal n.

Answer 11

• V1: ophthalmic n.
• V2: maxillary n.
• V3: mandibular n.

Question 12

Primary function of CN: vestibulocochlear

(sensory, somatic, and/or parasympathetic)

Answer 12

sensory: hearing (cochlear); equilibrium (vestibular)

Question 13

Primary function of CN: glossopharyngeal

(sensory, somatic, and/or parasympathetic)

Answer 13

• sensory: touch/taste to posterior 1/3 of tongue, visceral sensory to carotid bodies
• somatic: 1 pharyngeal muscle (stylopharyngeus m.)
• parasympathetic: parotid salivary gland

Question 14

Primary function of CN: accessory

(sensory, somatic, and/or parasympathetic)

Answer 14

somatic: trapezius m. and SCM m.

Question 15

Somatic function of the oculomotor n.

Answer 15

• 4 eye muscles:
  
  • superior rectus m.
  • medial rectus m.
  • inferior rectus m.
  • inferior oblique m.
• levator palpebrae superioris m.

Question 16

Parasympathetic function of the oculomotor nerve

Answer 16

• sphincter pupillae m. constricts pupil
• ciliary m. contracts to make lens puffy for near vision

Question 17

Branchial motor of the facial n.

Answer 17

• muscles of facial expression
• stapedius m.
• stylohyoid m.
• posterior belly of the digastric m.

Question 18

Visceral motor of the facial n.

Answer 18

• salivary glands
• lacrimal glands
• glands of the nose and the palate

Question 19

General sensory of the facial n.

Answer 19

• skin of external auditory meatus

Question 20

Special sensory of the facial n.

Answer 20

• anterior 2/3 of the tongue

Question 21

Branchial motor of the glossopharyngeal n.

Answer 21

stylopharangeus m.

Question 22

Visceral motor of the glossopharyngeal n.

Answer 22

parasympathetic innervation of the parotid gland

Question 23

Visceral sensory of the glossopharyngeal n.

Answer 23

visceral sensory from the carotid body and sinus

Question 24

General sensory of the glossopharyngeal n.

Answer 24

• external ear
• posterior 1/3 of tongue
• internal surface of TM
• palatine tonsil
• pharynx

Question 25

Special sensory of the **glossopharyngeal n.**

Answer 25

posterior 1/3 of tongue

Question 26

Branchial motor of the **vagus n.**

Answer 26

* superior, middle, and inferior pharyngeal constrictor mm. * cricothyroid m. * posterior cricoarytenoid m. * lateral cricoarytenoid m. * aryepiglottic m. * thyroarytenoid m. * transverse arytenoid m. * oblique arytenoid m. * vocalis m. * levator veli palatini m. * palatoglossum m. * salpingopharyngeus m. * palatopharyngeus m. * musculus uvulae m.

Question 27

Visceral motor of the **vagus n.**

Answer 27

* pharynx * larunx * trachea * bronchi * heart * esophagus * stomach * intestine

Question 28

Visceral sensory of the **vagus n.**

Answer 28

* base of tongue * pharynx * larynx * trachea * bronchi * heart * esophagus * intestine * stomach

Question 29

General sensory of the **vagus n.**

Answer 29

* auricle * external auditory meatus * dura mater of the posterior cranial fossa * pharynx * soft palate * larynx

Question 30

Somatic motor of the **hypoglossal n.**

Answer 30

* genioglossus m. * styloglossus m. * hypoglossus m. * superior longitudinal m. * inferior longituginal m. * transverse m. * vertical m.

Question 31

Sensory function of the **ophthalmic division of the trigeminal n.**

Answer 31

* scalp * forehead * cornea * dorsum of nose * mucosa of nasal cavity * paranasal sinuses

Question 32

Sensory function of the **maxillary division of the trigeminal n.**

Answer 32

* face * upper lip * maxillary teeth * mucosa of nose * maxillary sinuses * palate

Question 33

Sensory function of the **mandibular** **division of the trigeminal n.**

Answer 33

* mandible * lower lib * mandibular teeth * TMJ * mucosa of mouth * anterior 2/3 of tongue

Question 34

Motor function of the **mandibular division of the trigeminal n.**

Answer 34

* temporalis m. * masseter m. * lateral pterygoid m. * medial pterygoid m. * tensor veli palatini m. * tensor tympani m. * mylohyoid m. * anterior belly of digastric m.

Question 35

Which nerve innervates the meninges?

Answer 35

Trigeminal n. | (general sensory to the meninges)