Shoulder Girdle Muscles

Question 1

state the action(s) of the - subclavicus (1)

Answer 1

stabilises the clavicle at the sternoclavicular joint

Question 2

state the action(s) of the - levator scapulae (4)

Answer 2

1. elevation
2. retraction
3. stabilisation
4. when working with the trapezius, bilateral contraction causes neck extension, unilateral contraction causes neck lateral flexion

Question 3

state the action(s) of the - rhomboids (3)

Answer 3

1. retraction (with traps)
2. medial rotation
3. important role in posture and stabilising the scapula during shoulder abduction

Question 4

state the action(s) of the - upper trapezius fibres (3)

Answer 4

1. elevation
2. retraction
3. lateral rotation (with lower fibres)

Question 5

state the action(s) of the - middle trapezius fibres (1)

Answer 5

retraction

Question 6

state the action(s) of the - lower trapezius fibres (2)

Answer 6

1. retraction

2. lateral rotation (with upper fibres)

Question 7

state the action(s) of the - serratus anterior (2)

Answer 7

1. protraction

2. lateral rotation

Question 8

state the action(s) of the - pectoralis minor (5)

Answer 8

1. stabilisation
2. depression
3. protraction
4. internal rotation
5. elevates the ribs for a deeper inspiration when the pectoral girdle is fixed or in an elevated position

Question 9

state the origin(s) of the - pectoralis minor

Answer 9

ribs 3-5

Question 10

state the origin(s) of the - serratus anterior

Answer 10

ribs 1-9

Question 11

state the origin(s) of the - upper trapezius fibres

Answer 11

external oblique protuberance; the ligamentum nuchae; spinous process of C7

Question 12

state the origin(s) of the - medial trapezius fibres

Answer 12

spinous processes of T1-T5

Question 13

state the origin(s) of the - lower trapezius fibres

Answer 13

spinous processes of T6-T12

Question 14

state the origin(s) of the - rhomboid major

Answer 14

spinous process and intervening supraspinous ligaments of T2-T5

Question 15

state the origin(s) of the - rhomboids minor

Answer 15

spinous processes of C1-C7

Question 16

state the origin(s) of the - levator scapulae

Answer 16

transverse process of C1-C4

Question 17

state the origin(s) of the - subclavicus

Answer 17

1st rib and costal cartilage

Question 18

state the insertion(s) of the - subclavicus

Answer 18

inferior surface of the middle third of the clavicle

Question 19

state the insertion(s) of the - levator scapulae

Answer 19

medial border of the scapula between the superior angle and the triangular smooth area at the base of the scapula spine

Question 20

state the insertion(s) of the - rhomboids (major and minor)

Answer 20

medial border of the scapula

Question 21

state the insertion(s) of the - upper trapezius fibres

Answer 21

posterior border of the lateral third of the clavicle

Question 22

state the insertion(s) of the - middle trapezius fibres

Answer 22

medial acromial margin and the superior lip of the crest of the scapula spine

Question 23

state the insertion(s) of the - lower trapezius fibres

Answer 23

common tendon to tubercle on medial end of the spine of the scapula

Question 24

state the insertion(s) of the - serratus anterior

Answer 24

costal surface of the medial border of the scapula

Question 25

state the insertion(s) of the - pectoralis minor

Answer 25

medial border and superior surface of the coracoid process of the scapula