Neck Neurology

Question 1

Branches of the vagus n. in the neck:

Answer 1

Pharyngeal branches
Superior laryngeal n. –> internal and external laryngeal ns.
Recurrent laryngeal n. –> inferior laryngeal n.

Question 2

Parts of the cervical plexus

Answer 2

C1 running w/ CN XII
Ansa cervicalis
Transverse cervical n.
Supraclavicular n.
Lesser occipital n.
Great auricular n.

Question 3

Roots of ansa cervicalis

Answer 3

C1 superior

C2-3 inferior

Question 4

Roots of supraclavicular ns. and function

Answer 4

C3-4

Skin on neck and shoulders

Question 5

Roots of transverse cervical n. and function

Answer 5

C2-3

Skin over anterior triangle

Question 6

Root of lesser occipital n. and function

Answer 6

C2

Skin on posterior neck and posterior scalp.

Question 7

Roots of great auricular n. and function

Answer 7

C2-3

Skin over parotid and posterior auricle.

Question 8

How do we get sympathetic innervation to head and neck viscera in the neck?

Answer 8

Up the cervical sympathetic chain and out internal carotid n., external carotid n., or vertebral ns. to the carotid periarterial plexus –> viscera.

Question 9

How do we get sympathetic innervation to SM and glands?

Answer 9

Up the cervical sympathetic chain and out gray rami communicans and onto a somatic n.