Muscles - Upper Body

Question 1

Sternocleidomastoid

Answer 1

• Location
Runs from the sternum to the clavicle bone and the temporal bone; runs down the side of the front of the neck

• Action
Flexes the neck; rotates and lowers the head

Question 2

Trapezius

Answer 2

• location
A large triangular muscle covering the back of the neck and the upper back

• action
Draws the head backwards and allows movement at the shoulder

Question 3

Occipitalis

Answer 3

• location
Covers the back of the base of the skull

• action
Draws scalp backwards

Question 4

Pectoralis major

Answer 4

• location
Across the upper chest (underneath the breasts) from the clavicle, sternum and the ribs to the top of the humerus, forming the front wall of the axilla

• action
Used in throwing and climbing to adduct the arm, drawing it forwards and rotating it medially

Question 5

Pectoralis minor

Answer 5

• location
Underneath the pectoralis major. It’s origin is the third, fourth and fifth ribs and it inserts into the outer corner of the scapula

• action
Draws the shoulder downwards and forwards

Question 6

Deltoid

Answer 6

• location
over the tops of the shoulder from the clavicle and scapula to the upper part of the humerus.

• action
abducts the arm to a horizontal position aids in further abduction and in drawing the arm backwards and forwards