Overview of movements of pectoral girdle

Question 1

What are the 3 joints of the pectoral girdle called?

Answer 1

Sternoclavicular joint
Acromioclavicular joint
Glenohumeral joint

Question 2

What are the 6 scapula movements that occur?

Answer 2

Elevation
Depression
Protraction
Retraction
Upward rotation
Downward rotation

Question 3

What 3 muscles are involved during shoulder elevation?

Answer 3

o Descending part of trapezius
o Transverse part of trapezius
o Levator scapulae

Question 4

What 3 muscles are involved during shoulder depression?

Answer 4

o Ascending part of trapezius
o Transverse part of trapezius
o Pectoralis minor

Question 5

What 2 muscles are involved in protraction of the scapula?

Answer 5

o Pectoralis minor
o Serratus anterior

Question 6

What 2 muscles are involved in retraction of the scapula?

Answer 6

o Trapezius
o Latissimus dorsi
 Other contributing muscles: Rhomboid major, Rhomboid minor

Question 7

What muscles contribute to upward rotation?

Answer 7

Combination of activation of descending fibres of trapezius, serratus anterior pulling the inferior angle of the scapula upwards, and some inferior fibres of trapezius pulling fibres down

Question 8

What muscles contribute to downward rotation?

Answer 8

Combination of actions of levator of scapula, rhomboids, pectoralis minor pulling coracoid process