Neuroanatomy Draw It To Know It

3. Peripheral Nervous System—Upper Extremity 53

DRAWING 3-12 Cervical Plexus — Complete

Jugular

foramen

C1

C2

C3

C4

C5

Lesser

occipital n.

(cutaneous)

Greater

auricular n.

(cutaneous)

Hypoglossal

canal

Hypoglossal nerve

Transverse

cervical n.

(cutaneous)

Sternocleidomastoid

muscle

Trapezius

muscle

Phrenic

nerve

Supraclavicular

nerve (cutaneous)

Ansa

cervicalis

Sternocleidomastoid

muscle

Spinal

accessory

nerve

Clavicle

Tongue muscles: intrinsic &

extrinsic (majority)

Genio- and thyrohyoid

Sternothyroid, sternohyoid,

and inferior omohyoid

Cervical plexus also provides innervation to the

anterior vertebral muscles, scalene muscles,

and the levator scapulae.

Inferior

root

Superior

root

Superior

omhyoid

Superior pinna/

post.lat. head

Inferior pinna/

mandible

Antero-

lateral

neck

Posterolateral neck, upper chest,

and shoulder

Diaphragm

(C2-C4)

(C3, C4)