Shoulder Joint

Question 1

What muscles flex the shoulder?

Answer 1

Deltoid (anterior fibres)
Pectoralis Major (upper fibres)
Biceps Brachii
Coracobrachialis

Question 2

What muscles extend the shoulder?

Answer 2

Deltoid (posterior fibres)
Latissimus Dorsi
Teres Major
Pectoralis Major
Triceps Brachii

Question 3

What muscles abduct the shoulder?

Answer 3

Deltoid

Supraspinatus

Question 4

What muscles adduct the shoulder?

Answer 4

Latissimus Dorsi
Teres Major
Infraspinatus
Teres Minor
Pectoralis Major
Triceps Brachii (long head)
Coracobrachialis

Question 5

What muscles medially rotate the shoulder?

Answer 5

Deltoid (anterior fibres)
Latissimus Dorsi
Teres Major
Subscapularis
Pectoralis Major

Question 6

What muscles laterally rotate the shoulder?

Answer 6

Deltoid (posterior fibres)
Infraspinatus
Teres Minor

Question 7

Name the muscles that make up the rotator cuff?

Answer 7

Supraspinatus
Infraspinatus
Teres Minor
Subscapularis

Question 8

O and I of Deltoid (anterior fibres)

Answer 8

O = Lateral one-third of clavicle, acromion and spine of scapula

I = Deltoid tuberosity

Question 9

O and I of Pectoralis Major (upper fibres)

Answer 9

O = clavicle, sternum and cartilage of first through sixth ribs

I = Crest of greater tubercle of humerus

Question 10

O and I of Biceps Brachii

Answer 10

O =
Short head: Coracoid process of scapula
Long head: Supraglenoid tubercle of scapula

Tuberosity of the radius and aponeurosis of the biceps brachii

Question 11

O and I of Coracobrachialis

Answer 11

O = Coracoid process of the scapula

I = Medial surface of mid-humeral shaft

Question 12

O and I of Latissimus Dorsi

Answer 12

O = Inferior angle of scapula, spinous processes of last six thoracic vertebrae, last three or four ribs, thoracolumbar aponeurosis and posterior iliac crest

I = Intertubercular groove of the humerus

Question 13

O and I of Teres Major

Answer 13

O = Inferior angle and lower one-third of lateral border of the scapula

I = Crest of the lesser tubercle of the humerus

Question 14

O and I of Triceps Brachii

Answer 14

O =
Long head: Infraglenoid tubercle of the scapula.

Lateral head: Posterior surface of proximal half of the humerus.

Medial head: Posterior surface of distal half of the humerus

I = Olecranon process of the ulna

Question 15

O and I of Supraspinatus

Answer 15

O = Supraspinous fossa of the scapula

I = Greater tubercle of the humerus

Question 16

O and I of Infraspinatus

Answer 16

O = Infraspinous fossa of the scapula

I = Greater tubercle of the humerus

Question 17

O and I of Teres Minor

Answer 17

O = Upper two-thirds of the lateral border of the scapula

I = Greater tubercle of the humerus

Question 18

O and I of Subscapularis

Answer 18

O = Subscapular fossa of the scapula

I = Lesser tubercle of the humerus