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Flashcards in exam 2 hypoglossal nerve Deck (15)
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1
Q

the hypoglossal nerve carries what type of information?

A

exclusively motor

2
Q

what muscles groups are supplied by the hypoglossal?

A

intrinsic and extrinsic muscles of the tongue with the exception of the palatoglossus

3
Q

the hypoglossal is formed by axons from cell bodies located where?

A

nucleus of he hypoglossal nerve

4
Q

where is the nucleus of the hypoglossal nerve located?

A

floor of the rhomboid fossa

5
Q

the hypoglossal nerve emerges as a series of rootlets between what?

A

the pyramid and the olive of the medulla oblongata

6
Q

the rootlets of the emerging hypoglossal combine to form two bundles which exit the skull through what?

A

the hypoglossal canal

7
Q

what is the combination point of the two bundles into one?

A

exiting the hypoglossal canal

8
Q

after combining the hypoglossal descends to reach where?

A

base of the tongue

9
Q

while descending to reach the base of the tongue what does the hypoglossal nerve do?

A

forms a loop known as the arch of the hypoglossal nerve

10
Q

what does the hypoglossal nerve do upon reaching the base of the tongue?

A

distributes into terminal branches to supply the muscle of the tongue

11
Q

some cervical fibers will travel with the hypoglossal to supply what muscle?

A

geniohyoid and thyrohyoid muscle

12
Q

what is the communication relationship between the first and second cervical nerves and the hypoglossal?

A

they travel with but do not incorporate while eventually separating

13
Q

upon the separation of the first and second cervical nerves from the path of hypoglossal, they form what structure?

A

they form the superior root of the ansa cervicalis

14
Q

lingual branches are given off of the hypoglossal to supply what muscles?

A

hypoglossus
genioglossus
styloglossus

15
Q

clinical considerations of the hypoglossal nerve?

A

hemiatrophy tongue and larynx will deviate
tongue to side of lesion
larynx to unaffected side