Exam 2 Muscles Of Arm

Question 0

What is the insertion of the biceps brachii?

Answer 0

Radial tuberosity and fascia of forearm via bicipital aponeurosis

Question 1

What is the origin of the biceps brachii?

Answer 1

Short head: tip of coracoid process of scapula

Long head: supraglenoid tubercle of humerus

Question 2

What is the innervation of the biceps brachii?

Answer 2

Musculocutaneous nerve C5, C6

Question 3

What is the main action of the biceps brachii?

Answer 3

Supinate forearm, flexes elbow joint when supinated

Question 4

What is the origin of the brachialis?

Answer 4

Distal half of anterior surface of humerus

Question 5

What is the insertion of the brachialis?

Answer 5

Coronoid process and tuberosity of ulna

Question 6

What is the innervation of the brachialis?

Answer 6

Musculocutaneous nerve

Question 7

What is the main action of the brachialis?

Answer 7

Flexes elbow joint

Question 8

What is the origin of the coracobracialis?

Answer 8

Tip of the coracoid process of scapula

Question 9

What is the insertion of the coracobrachialis?

Answer 9

Middle third of medial surface of humerus

Question 10

What is the innervation of the coraobrachialis?

Answer 10

Musculocutaneous nerve

Question 11

What is the main action of the coracobrachialis?

Answer 11

Helps flex and adduct shoulder, resist dislocation of shoulder

Question 12

What is the origin of the 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 the triceps brachii?

Answer 13

proximal end of olecranon of ulna and fascia of forearm

Question 14

What are the main actions of the triceps bracchii?

Answer 14

Chief extensor of elbow joint; long head extends shoulder joint and resists dislocation of the humerus

Question 15

What is the innervation of the triceps brachii?

Answer 15

Radial nerve