CN PJ - XII - Hypoglossal

Question 1

function?

Answer 1

motor

Question 2

Pathways -3

Answer 2

1. pre central gyrus
2. depends with CST to Medulla
3. crosses at medulla to contralateral Hypoglossal Nucleus

Question 3

Lesions: UMN

Answer 3

contralateral weakness of only extrinsic

- tongue deviates contra. side of lesion

Question 4

lesions: LMN

Answer 4

Ipsi paralysis and muscle wasting

- tongue deviates ipsi.