Intrinsic Thoracic Limb Origins and Insertions

Question 1

Deltoideus m.

Answer 1

O: Scapular head - spine of the scapula via aponeurosis
Acromial head - acromion

I: Deltoid tuberosity of the humerus

Question 2

Infraspinatus m.

Answer 2

O: Infraspinous fossa of the scapula

I: Lateral side of the greater tubercle of the humerus

Question 3

Teres minor m.

Answer 3

O: Infraglenoid tubercle and distal third of caudal border of the scapula

I: Teres minor tuberosity of the humerus

Question 4

Supraspinatus m.

Answer 4

O: Supraspinous fossa of the scapula

I: Greater tubercle of the humerus

Question 5

Subscapularis m.

Answer 5

O: Subscapular fossa of the scapula

I: Lesser tubercle of the humerus

Question 6

Teres major m.

Answer 6

O: Caudal angle and caudal border of the scapula, caudal surface of the subscapularis m.

I: Teres major tuberosity of the humerus

Question 7

Coracobrachialis m.

Answer 7

O: Coracoid process of the scapula

I: Crest of the lesser tubercle of the humerus

Question 8

Tensor fasciae antebrachii m.

Answer 8

O: Fascia covering the lateral side of latissimus dorsi m.

I: Olecranon

Question 9

Triceps brachii m.

Answer 9

O: Long head - caudal border of the scapula
Lateral head - tricipital line of the humerus
Accessory head - neck of the humerus
Medial head - crest of the lesser tubercle of the humerus near the teres major tuberosity

I: Olecranon

Question 10

Anconeus m.

Answer 10

O: Lateral supracondylar crest of the humerus, lateral and medial epicondyles of the humerus

I: Lateral surface of the proximal end of the ulna

Question 11

Biceps brachii m.

Answer 11

O: Supraglenoid tubercle of the scapula

I: Dog - ulnar and radial tuberosities
Cat - radial tuberosity only

Question 12

Brachialis m.

Answer 12

O: Proximal third of the lateral surface of the humerus

I: Dog - ulnar and radial tuberosities
Cat - ulnar tuberosity only