Arm Muscles Origins And Insertions

Question 1

Biceps brachii

Answer 1

2 Origins
- Apex of coracoid process of scapula
- supraglenoid tubercle of scapula
Insertion: Radial Tuberosity of Radius

Question 2

Triceps Brachii

Answer 2

3 Origins:
- Infraglenoid tubercle of scapula
- Posterior surface of the humerus (inferior to radial groove)
- Posterior surface of the humerus (superior to radial groove)
Insertion: Olecranon of ulna

Question 3

Pectoralis Major

Answer 3

3 Origins:
- Anterior surface of medial half of clavicle
- Anterior surface of sternum, costal ribcages 1-6
- Anterior layer of recrus sheath
Insertion: crest of greater tubercle on humerus

Question 4

Subscapularis

Answer 4

Origin: Subscapular fossa of scapula
Insertion: Lesser tubercle of humerus

Question 5

Supraspinatus

Answer 5

Origin: Supraspinatus fossa of scapula
Insertion: Greater tubercle of humerus

Question 6

Deltoid

Answer 6

Origin: lateral 1/3 of clavicle, acromion spine of the scapula
Insertion: deltoid tuberosity of humerus