Cervical Plexus

Question 1

Cervical plexus

Answer 1

series of nerve loops from anterior rami of C1-C4

Question 2

Cutaneous branches of cervical plexus (4)

Answer 2

greater auricular nerve
transverse cervical nerve
lesser occipital nerve
supraclavicular nerves

Question 3

Greater auricular nerve

Answer 3

C2-C3
sensory
innervates skin near concha auricle (outer ear) and external acoustic meatus (ear canal)

Question 4

Transverse cervical nerve

Answer 4

C2-C3
sensory
innervates anterior region of neck

Question 5

Lesser occipital nerve

Answer 5

C2-C3
sensory
innervates the skin and scalp posterosuperior to the auricle

Question 6

Supraclavicular nerves

Answer 6

C3-C4
sensory
innervate region of supraspinatus, shoulder, and upper thoracic region

Question 7

Ansa cervicalis

Answer 7

loop formed from C1-C3
motor
geniohyoid (C1 only)
thyrohyoid (C1 only)
sternothyroid
sternohyoid
omohyoid

Question 8

Phrenic nerves

Answer 8

C3-C5 (primarily C4)
motor and sensory
innervates diaphragm and the pericardium

Question 9

Segmental branches of cervical plexus

Answer 9

C1-C4
motor
innervates anterior and middle scalenes