Chapter 10 (Summary of Cranial Nerves - Pt II)

Question 1

(Vestibulochochlear Nerve - CN VIII)

Function:

Answer 1

Special sensation of hearing, equilibrium/balance and motion (acceleration/deceleration)

Question 2

(Vestibulochochlear Nerve - CN VIII)

Component:

Answer 2

Special sensory for hearing and balance

Question 3

(Vestibulochochlear Nerve - CN VIII)

Origin:

Answer 3

Brainstem (junction between pons and medulla)

Question 4

(Vestibulochochlear Nerve - CN VIII)

Cranial exit:

Answer 4

Internal acoustic meatus

Question 5

(Glossopharyngeal Nerve - CN IX)

Function:

Answer 5

• Somatic motor to stylopharyngeus muscle and visceral motor to the parotid gland
• Special sensory (taste) to posterior third of tongue
• General sensation to pharynx, tonsillar sinus, pharyngotympanic tube, and middle ear cavity

Question 6

(Glossopharyngeal Nerve - CN IX)

Component:

Answer 6

Somatic motor, visceral motor, special sensory (taste), somatic sensory, viseral sensory

Question 7

(Glossopharyngeal Nerve - CN IX)

Origin:

Answer 7

Brainstem (medulla)

Question 8

(Glossopharyngeal Nerve - CN IX)

Cranial Exit:

Answer 8

Jugular foramen

Question 9

(Vagus Nerve - CN IX)

Function:

Answer 9

• Somatic sensory to inferior pharynx and larynx and assists with tough reflex
• Visceral sensory from the thoracic and abdominal organs
• Taste and somatic sensation from the root of tongue and taste buds on epiglottis
• Somatic motor and proprioception to the soft palate, pharynx, intrinsic laryngeal muscles
• Parasympathetic function to the thoracic and abdominal viscera

Question 10

(Vagus Nerve - CN IX)

Component:

Answer 10

Somatic motor, visceral motor, special sensory (taste), somatic sensory, visceral sensory

Question 11

(Vagus Nerve - CN IX)

Origin:

Answer 11

Brainstem (medulla)

Question 12

(Vagus Nerve - CN IX)

Cranial exit:

Answer 12

Jugular foramen

Question 13

(Spinal Accessory Nerve - CN XI)

Function:

Answer 13

Motor innervation to the sternocleidomastoid and trapezius muscles

Question 14

(Spinal Accessory Nerve - CN XI)

Component:

Answer 14

Somatic motor

Question 15

(Spinal Accessory Nerve - CN XI)

Origin:

Answer 15

Superior spinal cord

Question 16

(Spinal Accessory Nerve - CN XI)

Cranial Exit:

Answer 16

Jugular foramen

Question 17

(Hypoglossal nerve - CN XII)

Function:

Answer 17

Motor innervation to the intrinsic and extrinsic muscles of the tongue (styloglossus, hyoglossus, and genioglossus)

Question 18

(Hypoglossal nerve - CN XII)

Component:

Answer 18

Somatic motor

Question 19

(Hypoglossal nerve - CN XII)

Origin:

Answer 19

Brainstem (medulla)

Question 20

(Hypoglossal nerve - CN XII)

Cranial exit:

Answer 20

Hypoglossal canal