1c. Cervical Plexus

Question 1

nerve roots of the cervical plexus

Answer 1

anterior rami of C1-C4

Question 2

skin of the neck and scalp posterior to auricle

Answer 2

lesser occipital nerve (C2)

Question 3

skin and sheath over parotid gland, mastoid process, auricle, and angle of the mandible

Answer 3

great auricular nerve (C2-C3)

Question 4

skin of anterior cervical region

Answer 4

transverse cervical nerve (C2-C3)

Question 5

skin over the clavicle and over the shoulder

Answer 5

supraclavicular nerve (C3-C4)

Question 6

motor nerve that innervates the diaphragm

Answer 6

phrenic nerve (C3-C5)

Question 7

superior roots of the ansa cervicalis

Answer 7

C1-C2

Question 8

inferior roots of the ansa cervicalis

Answer 8

C2-C3

Question 9

innervation of sternohyoid m.

Answer 9

ansa cervicalis (C1-C3)

Question 10

innervation of sternothyroid m.

Answer 10

ansa cervicalis (C2-C3)

Question 11

innervation of thyrohyoid m.

Answer 11

C1 via hypoglossal n.

Question 12

innervation of omohyoid m.

Answer 12

ansa cervicalis (C1-C3)

Question 13

innervation of anterior scalene m.

Answer 13

anterior rami (C4-C6)

Question 14

innervation of middle scalene m.

Answer 14

anterior rami (C3-C4, C5-C8)

Question 15

Which scalene m. is not innervated by the cervical plexus?

Answer 15

posterior scalene m.