Exam 2: CN 12

Question 1

Hypoglossal N exclusively

Answer 1

Motor

Question 2

Hypoglossal supplies intrinsic and extrinsic muscles of tongue, EXCEPT

Answer 2

Palatoglossus

Question 3

NO for CN12

Answer 3

Nucleus of Hypoglossal N (on floor of rhomboid fossa)

Question 4

AO for CN12

Answer 4

Sulcus between pyramid and olive of MO (rootlets)

Question 5

CN12 exits skull via

Answer 5

Hypoglossal canal

Question 6

As the nerve descends, it forms a loop, ____, to reach base of tongue

Answer 6

Arch of hypoglossal N

Question 7

Some fibers from ___ travel with CN12

Answer 7

C1 and C2

Question 8

C1 and C2 separate from hypoglossal nerve to form

Answer 8

Superior root of ansa cervicalis

Question 9

Some cervical fibers will continue with hypoglossal to ultimately supply

Answer 9

Geniohyoid

Thyrohyoid

Question 10

Lingual branches of hypoglossal N supply

Answer 10

Hyoglossus
Genioglossus
Styloglossus

Question 11

Hemiatrophy

Answer 11

Tongue deviates to weak side when stuck out

Larynx may deviate to uninvolved side when swallowing