Elbow and Forearm Muscles

Question 1

Biceps

Answer 1

Origin: Long head on supraglenoid tubercle.
Short Head on coracoid process.

Insertion: Radial Tuberosity.

Function: Flexion of the elbow. Supinates the forearm.

Question 2

Triceps

Answer 2

Origin: Long head on infraglenoid tubercle.
Other 2 heads on the posterior aspect of humerus.

Insertion: Olecranon process

Function: Extension of Elbow.

Question 3

Brachialis

Answer 3

Origin: Lower anterior surface of humerus.

Insertion: Coronoid process

Function: Flexion of elbow.

Question 4

Brachioradialis

Answer 4

Origin: Above lateral epicondyle of humerus.

Insertion: Styloid process of radius.

Fuction: Flexion of forearm when semi-pronated.

Question 5

Anconeus

Answer 5

Origin: Lateral epicondyle of humerus.

Insertion: Olecranon process and posterior surface of ulna.

Function: Extends elbow.

Question 6

Pronator Quadratus

Answer 6

Origin: Anterior distal surface of ulna.

Insertion: Anterior distal surface of radius.

Function: Pronates forearm.

Question 7

Pronator Teres

Answer 7

Origin: Medial epicondyle of humerus and coronoid process of ulna.

Insertion: Midshaft of radius.

Function: Pronates forearm and flexes elbow.

Question 8

Supinator

Answer 8

Origin: Lateral epicondyle of humerus.

Insertion: Anterior aspect of radius.

Function: Supinates forearm.