Movements of the Pectoral Girdle

Question 0

What is protraction and retraction?

Answer 0

Swinging a punch

Question 1

What is elevation and depression?

Answer 1

Shrugging your shoulders

Question 2

What is lateral and medial rotation?

Answer 2

Raising your arm (lateral) so the inferior angle increases and lowering your arm (medial) so the angle decreases

Question 3

describe the trapezium muscle?

Answer 3

Large and superficial

origin just below occipital and attaches to C and T vertebrae and other places

Question 4

What are the functions of the trapezium muscle?

Answer 4

Elevate girdle with upper fibres
a depress scapula with lower fibres
Retract girdle
Rotate scapula laterally with upper fibres