Cervical Muscles

Question 1

Sternocleidomastoid Muscle

Location
Region
Origin
Insertion
Action

Answer 1

Location: Lateral sides of the neck (paired)

Origin: Clavicle, sternum

Insertion: Mastoid process of the temporal bone and line of the occipital bone.

Action:

• One muscle: head and neck bend to ipsilateral side.
• Both: neck flexes, junction of head and neck extend.

Question 2

Trapezius Muscle

Location
Region
Origin
Insertion
Action

Answer 2

Location: superficial to posterior and lateral surface of neck.

Origin: Occipital bone.

Insertion: Clavicle and parts of the scapula.

Action: Lift clavicle and scapula when shoulders are “shrugged”.