CN XII: Hypoglossal Nerve Flashcards
1
Q
What type of axons does CN XII contain?
A
General somatic efferent
2
Q
Where do the axons terminate?
A
Tongue muscles
3
Q
Where is the Hypoglossal nucleus most visible?
A
Rostral medulla - posteromedially just anterior to the 4th ventricle
4
Q
What is the major function of CNXII?
A
Moves the tongue
5
Q
What will happen during a lower motor neuron injury to CN XII?
A
Tongue will deviate toward side of lesion
6
Q
What would happen in the case of an upper motor neuron injury?
A
Deviation toward opposite side of lesion due to decussation of upper motor neurons
7
Q
How would you tell the difference between a lower motor neuron or upper motor neuron injury?
A
There would be much more atrophy in a lower motor neuron injury
