Arms

Question 0

What is the insertion of biceps brachii?

Answer 0

Tuberosity of radius & fascia of forearm via bicipital aponeurosis

Question 1

What is the origin of biceps brachii?

Answer 1

Short head: tip of coracoid process of scapula

Long head: supraglenoid tubercle of scapula

Question 2

What innervates biceps brachii?

Answer 2

Musculocutaneous nerve (C5, C6)

Question 3

What are the actions of biceps brachii?

Answer 3

Supinates forearm, and when supinated, flexes elbow; flexes shoulder joint; short head resists dislocation of shoulder

Question 4

What is the origin of brachialis?

Answer 4

Distal half of anterior surface of humerus

Question 5

What is the insertion of brachialis?

Answer 5

coronoid process & tuberosity of ulna

Question 6

What innervates brachialis?

Answer 6

Musculocutaneous nerve (C5, C6)

Question 7

What is the action of brachialis?

Answer 7

Flexes elbow joint in all positions

Question 8

What is the origin of coracobrachialis?

Answer 8

Tip of coracoid process of scapula

Question 9

What is the insertion of coracobrachialis?

Answer 9

Middle third of medial surface of humerus

Question 10

What innervates coracobrachialis?

Answer 10

Musculocutaneous nerve (C5, C6, C7)

Question 11

What are the actions of coracobrachialis?

Answer 11

Helps flex & adduct shoulder joint; resists dislocation of shoulder

Question 12

What is the origin of triceps brachii?

Answer 12

Long head: infraglenoid tubercle of scapula
Lateral head: posterior surface of humerus, superior to radial groove
Medial head: posterior surface of humerus, inferior to radial groove

Question 13

What is the insertion of triceps brachii?

Answer 13

Proximal end of olecranon of ulna and fascia of forearm

Question 14

What innervates triceps brachii?

Answer 14

Radial nerve (C6, C7, C8)

Question 15

What are the actions of triceps brachii?

Answer 15

Chief extensor of elbow joint; long head extends shoulder joint & resists dislocation of humerus (especially important in abduction)