Arm Muscles

Question 1

Deltoid

Answer 1

Origin: lateral ⅓ of clavicle, spine of scapula, acromion process of the scapula

Insertion: deltoid tuberosity of the humerus

Action: abbducts humerus, flexes humerues ar shoulder, rotates humerus mediallu, extendes humerues ar shoulder, rotares humerus laterally

Question 2

Answer 2

Deltoid

Question 3

Biceps Brachii Short Head

Answer 3

Origin: Coracoid Process of the scapula

Insertion: radial tuberosity of the radius

Action: flexes forearm at elbow, supinates forearm

Question 4

Answer 4

Biceps Branchii Short Head

Question 5

Answer 5

Biceps Brachii Long Head

Question 6

Brachialis

Answer 6

Origin: anterior humerus

Insertion: coronoid process of the ulna

Action: flexes forearm at elbow

Question 7

Answer 7

Brachialis

Question 8

Coracobrachialis

Answer 8

Origin: coracoid process of the scapula

Insertion: medial surface of shaft of humerus

Action: flexes humerus at shoulder, adducts humerus

Question 9

Answer 9

coracobrachialis

Question 10

Triceps Brachii

Long Head

Answer 10

Origin: infraglenoid tubbercle of the scapula

Insertion: olecranon process of the ulna

Action: extends forearm at the elbow

Question 11

Answer 11

Triceps Brachii

Long Head

Question 12

Triceps Brachii

Lateral Head

Answer 12

Origin: posterior surface of shaft humerus

Insertion: olecranon process of the ulna

Action: extends forearm at the elbow

Question 13

Answer 13

Triceps Branchii

Lateral Head