Muscles Of The Forearm

Question 1

Muscles that move the elbow and radioulnar joints.

Name? Origin? Insertion? Actions?

Answer 1

Brachialis
Origin: distal 1/2 of anterior shaft of humerus
Insertion: ulnar tuberosity and coronoid process of ulna
Actions: flexion at the elbow

Question 2

Muscles that move the elbow and radioulnar joints.

Name? Origin? Insertion? Actions?

Answer 2

Anconeus
Origin: lateral epicondyle of humerus
Insertion: proximal part of posterior ulna, lateral surface of olecranon (elbow)
Actions: extension of the elbow

Question 3

Muscles that move the elbow and radioulnar joints.

Name? Origin? Insertion? Actions?

Answer 3

Pronator teres
Origin: coronoid process of ulna, medial epicondyle of humerus
Insertion: lateral mid shaft of radius
Actions: pronation, flexion at the elbow

Question 4

Muscles that move the elbow and radioulnar joints.

Name? Origin? Insertion? Actions?

Answer 4

Pronator quadratus
Origin: distal 1/4 anterior ulna
Insertion: distal 1/4 anterior radius
Actions: pronation

Question 5

Muscles that move the elbow and radioulnar joints.

Name? Origin? Insertion? Actions?

Answer 5

Supinator
Origin: lateral epicondyle of humerus, ulna crest (interosseous border)
Insertion: lateral, posterior and anterior upper shaft of radius
Action: supination

Question 6

Muscles that move the elbow and radioulnar joints.

Name? Origin? Insertion? Actions?

Answer 6

Brachioradialis
Origin: lateral supracondylar ridge of humerus
Insertion: distal radius just proximal to the radial styloid process
Actions: pronation and supination, weak elbow flexor

Question 7

Muscles that attach at the radius will…

Answer 7

Pronate/supinate

Question 8

Muscles that attach at the ulna will…

Answer 8

NOT Pronate/supinate

Question 9

Origin of all muscles in the anterior superficial layer

Answer 9

Medial epicondyle (also known as the “common flexor origin” CFO)