Shoulder Muscles

Question 1

Supraspinatous

Answer 1

Origin: supraspinatous fossa of the scapula

Insertion superior facet of greater tubercle of humorous

Question 2

Pectoralis minor

Answer 2

Origin: anterior surface of third and fifth ribs
Insertion: via a tendon to the medial aspect of the coracoid process of scapula.
The tendon may transverse this process and continue to the coraoacrominal ligament

Question 3

Pectoralis major sternal head

Answer 3

Origin: lateral aspect of the manubrium
body of the sternum,
the Upper 6 costal cartilages
Aponeurosis of external oblique

Insertion: lateral lip of the bicipital groove of the humorous and anterior lip of the deltoid tuberosity

Question 4

Deltoid middle fibres

Answer 4

Origin: lateral border of the acromion process of the scapula

Insertion: the deltoid tuberosity lateral surface of the proximal humeral shaft

Question 5

Posterior deltoid

Answer 5

Origin: inferior edge of the scapula spine

Insertion: deltoid tuberosity
Lateral surface of proximal humeral shaft

Question 6

Pectoralis major clavicula head

Answer 6

Origin: anterior surface of the medial half of the clavicle

Insertion: lateral lip of the bicipital groove of the humorous and anterior lip of the deltoid tuberosity

Question 7

Deltoid anterior fibres

Answer 7

Origin: anterior border of the lateral third of the clavicle

Insertion: the deltoid tuberosity of the lateral surface of the proximal humeral shaft

Question 8

Serratus anterior

Answer 8

Origin: lateral aspect of the first 8 to 9 ribs arises over anterior lateral surface of the ribs, anterior to the mid-axillary line and runs in a posterior and superior direction

Insertion: the entire length of the medial border of the scapula on its anterior surface

Question 9

Triceps brachaii medial head

Answer 9

Origin: posterior shaft of humorous medial and distal to the spiral groove

Insertion: posterior surface of the olecranon process of the ulna

Question 10

Triceps brachii lateral head

Answer 10

Origin: superior half of the posterior surface of the humeral shaft
Lateral to the spiral groove
Insertion: posterior surface of olecranon process of the ulna

Question 11

Triceps brachaii long head

Answer 11

Origin: infraglenoid tubercle of scapula
Insertion: posterior surface of the olcranion process of the ulna

Question 12

Biceps brachia

Answer 12

Origin: long-head: supraglenoid tubercle superior portion of the scapula
Short head: lateral aspect of the apex of the coracoid process
Insertion: radial tuberosity and bicipital groove aponeurosis

Question 13

Teres major

Answer 13

Origin: dorsal surface of the lower third of lateral border of the scapula
Insertion: medial lip of the bicipital groove of the humorous

Question 14

Subscapularis

Answer 14

Origin: medial 2/3 of volar surface of the scapula

Insertion: lesser tubercle of humorous

Question 15

Terrs minor

Answer 15

Origin: dorsal surface of the middle half of the lateral border of the scapula

Insertion: the lowest of the three facets of the greater tubercle of the humorous

Question 16

Infraspinatus

Answer 16

Origin: infraspinous fossa of the scapula
Insertion: middle facet of greater tubercle of the humorous