Lateral Cervical Region

sternocleidomastoid attachments

Anterior manubrium, medial 1/3 of clavicle

Mastoid process (temporal bone), occipital bone

sternocleidomastoid actions

Bilateral: neck flexion

Unilateral: neck lateral flexion, head rotation

sternocleidomastoid peripheral innervation

Spinal accessory nerve (CN XI) & ventral rami of C2-C4

sternocleidomastoid spinal innervation and *cranial

*Spinal accessory nerve (CN XI), C2-C4

Anterior scalene attachments

Anterior tubercles of cervical vertebrae

Rib 1

Anterior scalene actions

Bilateral: neck flexion

Unilateral: neck lateral flexion, neck rotation

Anterior scalene peripheral innervation

Ventral rami of C4-C6

Anterior scalene spinal innervation

C4-C6

Middle scalene attachments

Transverse processes of cervical vertebrae

Rib 1

Middle scalene actions

Unilateral: neck lateral flexion

Middle scalene peripheral innervation

Ventral rami of C3-C8

Middle scalene spinal innnervation

C3-C8

Omohyoid peripheral innervation

ansa cervicalis

omohyoid spinal innervation

C1-C3