Cranial Nerves IX, X, XI, XII

Question 1

Location of Hypoglossal nucleus

Answer 1

Medulla (SE)

Question 2

Where do Hypoglossal rootlets exit?

Answer 2

adjacent to pyramid

Question 3

What does Hypoglossal n. innervate?

Answer 3

intrinsic tongue muscles

Question 4

Tongue Protrusion

Answer 4

Genioglossal muscle

Pulls muscle out of mouth

Question 5

Hypoglossal n. lesion

Answer 5

Is a lower motor neuron lesion
Tongue deviates toward side of lesion
Fasciculations
Atrophy

Question 6

Corticobulbar fibers arise from

Answer 6

face region of motor cortex

Question 7

Corticobulbar fibers __________ just before entering hypoglossal nucleus

Answer 7

decussate

Question 8

Lesions of corticobulbar fibers

Answer 8

Deviation of tongue toward side opposite upon
protrusion
No fasciculations
Minimal atrophy

Question 9

Spinal Accessory n. (SE) location and innervation

Answer 9

Spinal root (S.E.)
Spinal gray in cervical region
Innervates trapezius and sternocleidomastoid muscles

Question 10

how to test for lesion of Spinal Accessory Nerve on Trapezius Muscle

Answer 10

ask patient to shrug shoulders

Question 11

Vagus n. SVE

Answer 11

Nucleus ambiguus (S.V.E.)
- Muscles of speech and swallowing

Question 12

Vagus n. GVE

Answer 12

Dorsal motor nucleus of vagus (G.V.E.)
- Viscera from neck to transverse colon
  (parasympathetic)
Nucleus ambiguus (G.V.E.)
- Cardiac inhibition

Question 13

Vagus n. GSA

Answer 13

Skin of ear and middle ear cavity (G.S.A.)

• Superior ganglion of vagus nerve
• Trigeminal spinal nucleus

Question 14

Vagus n. GVA

Answer 14

Epiglottis (G.V.A.) - visceral sensibility

• Inferior ganglion of vagus nerve
• Solitary nucleus

Question 15

Vagus n. SVA

Answer 15

Epiglottis (S.V.A.) - taste

• Inferior ganglion of vagus nerve
• Solitary nucleus

Question 16

Glossopharyngeal n. SVE

Answer 16

Nucleus ambiguus (S.V.E.)
- Stylopharyngeus muscle

Question 17

Glossopharyngeal n. GVE

Answer 17

Inferior salivatory nucleus (G.V.E.)
- Otic ganglion
Parotid gland

Question 18

Glossopharyngeal n. GSA

Answer 18

Skin of ear (G.S.A.)
- Superior ganglion of glossopharyngeal nerve
- Trigeminal spinal nucleus
Carotid body and carotid sinus (blood pressure and blood O2 and CO2)

Question 19

Glossopharyngeal n. GVA

Answer 19

Posterior 1/3 of tongue (G.V.A.) - visceral sensibility

• Inferior ganglion of glossopharyngeal nerve
• Solitary nucleus

Question 20

Glossopharyngeal n. SVA

Answer 20

Posterior 1/3 of tongue (S.V.A.) - taste

• Inferior ganglion of glossopharyngeal nerve
• Solitary nucleus

Question 21

Gag reflex components

Answer 21

CN IX - afferent component

CN X - efferent component

Question 22

Glossopharyngeal neuralgia

Answer 22

(neuralgia = is pain in the distribution of a nerve or nerves)
Otic - external ear
Oral - back of tongue

Question 23

Jugular foramen syndrome

Answer 23

Includes CN IX, X, XI and XII
Pain in or behind the external ear
Headache - irritation of meningeal branch of X
Hoarseness - muscles of speech
Dysphagia (difficulty in swallowing) - muscles of
swallowing