CN12 Hypoglossal nerve Flashcards
1
Q
What is cranial nerve 12?
A
Hypoglossal nerve
2
Q
What does the hypoglossal nerve innervate?
A
Muscles of tongue
3
Q
What is the route of the CN12 hypoglossal nerve from its origin to its innervation?
A
Travels through hypoglossal canal
runs medially to angle of mandible
then passes over the internal and external carotid arteries
anteriorly towards tongue
4
Q
What is the function of the CN12 hypoglossal nerve?
A
Motor - muscles of tongue
5
Q
What are the signs and symptoms of damage to the CN12 hypoglossal nerve?
A
Weakness and atrophy of muscles of tongue on ipsilateral side
Tip of tongue points to ipsilateral side, pushed by other side of tongue
6
Q
How are the functions of the CN12 hypoglossal nerve tested?
A
Movement of tongue
