Muscles Of Arm

Question 0

Biceps brachii insertion

Answer 0

Tuberosity of radius and fascia of forearm via bicipital aponeurosis

Question 1

Biceps brachii origin

Answer 1

Short head: tip of coracoid process of scapula

Long head: supraglenoid tubercle of scapula

Question 2

Biceps brachii innervation

Answer 2

Musculocutaneous nerve C5, C6

Question 3

Biceps brachii actions

Answer 3

Supinates forearm and when it is supinator flexes elbow joint; flexes shoulder joint; short head resists dislocation of shoulder

Question 4

Brachialis origin

Answer 4

Distal half of anterior surface of humerus

Question 5

Brachialis insertion

Answer 5

Coronoid process and tuberosity of ulna

Question 6

Brachialis innervation

Answer 6

Musculocutaneous nerve C5, C6

Question 7

Brachialis actions

Answer 7

Flexes elbow joint in all position

Question 8

Coracobrachialis origin

Answer 8

Tip of coracoid process of scapula

Question 9

Coracobrachialis insertion

Answer 9

Middle third of medial surface of humerus

Question 10

Coracobrachialis innervation

Answer 10

Musculocutaneous nerve C5, C6, C7

Question 11

Coracobrachialis actions

Answer 11

Helps flex and adduct shoulder joint; resists dislocation of shoulder

Question 12

Triceps brachii origin

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

Triceps brachii insertion

Answer 13

Proximal end of olecranon of ulna and fascia of forearm

Question 14

Triceps brachii innervation

Answer 14

Radial nerve C6, C7, C8

Question 15

Triceps brachii actions

Answer 15

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

Question 16

Anconeus origin

Answer 16

Lateral epicondyle of humerus

Question 17

Anconeus insertion

Answer 17

Lateral surface of olecranon and superior part of posterior surface of ulna

Question 18

Anconeus innervation

Answer 18

Radial nerve C7, C8, T1

Question 19

Anconeus actions

Answer 19

Assists triceps in extending elbow joint; stabilizes elbow joint; abducts ulna during pronation