CN XII: Hypoglossal Nerve

Question 1

Emerges from?

Answer 1

medulla, VENTRAL to olive

Question 2

Exits through?

Answer 2

hypoglossal canal

Question 3

Motor function?

Answer 3

• all intrinsic tongue muscles

- most extrinsic tongue muscles (except palatoglossus - CN X)

Question 4

Test?

Answer 4

• check tongue for fasciculations

- ask patient to protrude and move tongue around (tongue will deviate towards lesion)