Biceps, Triceps, Brachialis

Question 1

Origin of short head of biceps brachii?

Answer 1

Coracoid process of scapula

Question 2

Insertion of entire biceps brachii?

Answer 2

Radial tuberosity

Question 3

Innervation of entire biceps brachii?

Answer 3

Musculocutaneous nerve

C5-C6

Question 4

Action of biceps brachii?

Answer 4

Elbow joint:
Flexion, Supination

Shoulder joint:
Flexion, stabilization of humeral head during deltoid contraction, abduction, internal rotation of humerus

Question 5

Origin of brachialis?

Answer 5

Distal half of anterior surface of humerus

Question 6

Insertion of brachialis?

Answer 6

Ulnar tuberosity

Question 7

Innervation of brachialis?

Answer 7

Musculocutaneous nerve
(C5-C6)

Radial nerve
(C7, minor)

Question 8

Action of brachialis?

Answer 8

Flexion at elbow joint

Question 9

Origin of long head of triceps brachii?

Answer 9

Infraglenoid tubercle of scapula

Question 10

Origin of medial head of triceps brachii?

Answer 10

Posterior humerus, inferior to radial groove

Medial intermuscular septum

Question 11

Origin of lateral head of triceps brachii?

Answer 11

Posterior humerus, proximal to radial groove

Lateral intermuscular septum

Question 12

Insertion of entire triceps brachii?

Answer 12

Olecranon of ulna

Question 13

Innervation of entire triceps brachii?

Answer 13

Radial nerve

C6-C8

Question 14

Action of triceps brachii?

Answer 14

Elbow joint: extension

Shoulder joint, long head: extension and adduction

Question 15

Origin of long head of biceps brachii?

Answer 15

Supraglenoid tubercle of scapula