Assumed Knowledge Upper Limb Actions

Question 1

What are the actions of Latissimus Dorsi?

Answer 1

Shoulder internal rotation

Shoulder extension

Shoulder adduction

Question 2

What are the axioscapular muscles ?

Answer 2

There are 6 axioscapular muscles.

1. Upper, middle, lower trap
2. Rhomboid major and minor
3. Serrated anterior
4. Pec minor
5. Levator scapulae
6. Subclavius

Question 3

What are the scapulohumeral muscles?

Answer 3

There are 8 scalulohumeral muscles

1. Pec major (clavicular head)
2. Anterior, middle and posterior deltoid
3. Supraspinatus
4. Infraspinatus
5. Subscapularis
6. Trees minor
7. Trees major (lats little helper)
8. Coraclbrachilais

Question 4

What are the axiohumeral muscles?

Answer 4

There are two axiohumeral muscles

1. Latissmus dorsi
2. Pec major (sternal head)

Question 5

What are the actions of pec major sternal head?

Answer 5

Shoulder adduction

Question 6

What are the three lateral rotators of the scapula?

Answer 6

Serratus anterior, upper trap, lower trap

Question 7

What are the medial rotators of the scapula?

Answer 7

Rhomboid major

Rhomboid minor

Levator scapulae

Pec minor

Question 8

What are the adductors of the shoulder?

Answer 8

Latissimus dorsi

Teres major

Pec major sternal head

Pec minor (minor adductor)

Question 9

What are the abductor/s of the shoulder ?

Answer 9

Middle deltoid

Question 10

What are the actions of pec major clavicular head

Answer 10

Shoulder flexion

Question 11

What are the actions of deltoid

Answer 11

Anterior - shoulder flexion and internal rotation
Middle - shoulder abduction
Posterior - shoulder extension and external rotation

Question 12

What are the actions of the posterior cuff?

Answer 12

Supraspinatus - external rot, assists in shoulder abduction, medial pull of humerus into glenoid fossa

Infraspinatus - shoulder external rot, shoulder extension, medial pull of humerus into glenoid fossa

Teres minor - shoulder external rot, medial pull of humerus into glenoid fossa

Question 13

Actions of Supraspinatus

Answer 13

Supraspinatus - external rot, assists in shoulder abduction, medial pull of humerus into glenoid fossa

Question 14

Actions of infraspinatus

Answer 14

Infraspinatus - shoulder external rot, shoulder extension, medial pull of humerus into glenoid fossa

Question 15

Actions of teres minor

Answer 15

Teres minor - shoulder external rot, medial pull of humerus into glenoid fossa

Question 16

Actions of anterior rotator cuff

Answer 16

Subscap : shoulder internal rot, medial pull of humerus into glenoid fossa

Question 17

Actions of Coracobrachialis

Answer 17

Shoulder flexion

Shoulder adduction

Question 18

Actions of Teres major

Answer 18

Lats little helper

Shoulder internal rotation
Shoulder extension
Shoulder adduction

Question 19

Actions of trapezius

Answer 19

Upper trap - scapula elevation and lateral rotation
Middle trap - scapula retraction and internal rotation
Lower trap - scapula depression and lateral rotation

Question 20

Actions for rhomboid

Answer 20

Rhomboid major and minor - scapula retraction and medial rotation of scapula

Question 21

Actions of Serratus anterior

Answer 21

Protraction
Scapula lateral rotation

Question 22

Pec minor

Answer 22

Scapular depression
Shoulder adduction
Scapula medial rotation during shoulder adduction!

Question 23

Actions of Levator scapulae

Answer 23

Scapular elevation

Scapular medial rotation

Question 24

Actions of subclavius

Answer 24

Elevation of first rib

Depression of sternal end of clavicle