CN XII Hypoglossal

Question 1

CN XII Hypoglossal - Type of neurons - Nucleus located in?

Answer 1

The medial dorsal tegmentum in the medulla.

Question 2

CN XII Hypoglossal - Type of neurons - Types of axons?

Answer 2

Voluntary motor

-Muscles of the tongue

Question 3

CN XII Hypoglossal - Exits the brainstem in the groove between the?

Answer 3

Pyramid and olive

Question 4

CN XII Hypoglossal - Tongue deviates toward the weak side - Ipsilateral to the?

Answer 4

Injury since a LMN injury and the tongue muscle itself is innervated ipsilaterally

Question 5

CN XII Hypoglossal - Ipsilateral tongue paresis/paraylsis with?

Answer 5

Atrophy and/or fasciculations

Question 6

CN XII Hypoglossal - Difficulty with moving the tongue results in difficulty in articulating speech?

Answer 6

Dysarthria

Question 7

CN XII Hypoglossal - Difficulty with moving the tongue impairs moving food around in the mouth and back toward the throat creating impaired swallowing?

Answer 7

Dyshagia

Question 8

CN XII Hypoglossal - Corticobrainstem injury - Damage to a single corticobrainstem tract rostral to the medulla leads to?

Answer 8

Contralateral tongue paresis

Question 9

CN XII Hypoglossal - Corticobrainstem injury - Dominant contralateral?

Answer 9

UMN innervation of LMN

Question 10

CN XII Hypoglossal - Corticobrainstem injury - Deviation to the weak side which is?

Answer 10

Contralateral to the UMN injury

Question 11

CN XII Hypoglossal - Corticobrainstem injury - Limited and later?

Answer 11

Onset atrophy