Elbow

Question 1

Brachioradialis

Answer 1

Origin - upper 2/3 of the lateral supracondylar ridge of the humerus

Insertion - base of the styloid process of the radius

Action -elbow flexion

Question 2

Brachialis

Answer 2

Origin - anterior surface of the distal half of the humerus

Insertion - anterior surface of the coronoid process

Action - elbow flexion

Question 3

Pronator quadratus

Answer 3

Origin - anterior aspect of distal quarter of the ulna

Insertion - anterior aspect of the distal radius

Action - pronation of forearm

Question 4

Biceps brachii

Answer 4

Origin - short head: tip of coracoid process, long head: supraglenoid tubercle

Insertion - posterior aspect of the radial tuberosity

Action - forearm flexion and supination, long head assists shoulder flexion

Question 5

Supinator

Answer 5

Origin - superficial head: lateral epicondyle, radial collateral and annular ligaments of elbow, deep head: from the supinator crest and fossa of ulna

Insertion - lateral aspect of proximal 1/3 of radius

Action - supination of the forearm

Question 6

Pronator teres

Answer 6

Origin - humeral head: immediately proximal to the medial epicondyle, ulnar head: medial aspect of the coronoid process

Insertion - half way along the lateral surface of the radial shaft

Action - pronation of forearm and assists elbow flexion

Question 7

Triceps brachii

Answer 7

Origin - long head: infraglenoid tubercle of the scapula, medial head: posterior surface of the humerus, Lateral head: lateral border of the humerus

Insertion - upper surface of olecranon process of the ulna

Action - elbow extension and long head assists extension of humerus at the shoulder