Deep neck muscles

Question 1

Origin: Articular processes of vertebrae c4-c7,transverse processes of vertebrae T1-T6

Insertion: Between superior and inferior nuchal lines of occipital bone

Action: extension and lateral flexion of head

Answer 1

Semispinalis capitis

Question 2

Origin: Spinous process of vertebrae c7-T3, nuchal ligament

Insertion: Lateral superior nuchal line of occipital bone, mastoid process of temporal bone

Action: Extends head and neck; lateral flexion and rotation of head.

Answer 2

Splenius Capitis

Question 3

Origin: Transverse processes of vertebrae T1-T6

Insertion: Spinous processes of vertebrae c2-c5

Action: Bilateral contraction: ext of head, cervical and thoracic spine.

Unilateral: lateral flexion of head

Answer 3

Semispinalis cervicis

Question 4

Origin: Transverse process of vertebrae c4-T5

Insertion: mastoid process of temporal bone

Action: Bilateral: extension of head and neck.

Unilateral: lateral flexion and rotation

Answer 4

Longgissimus capitis