Elbow

Question 1

Supinator

Answer 1

O: lateral epicondyle of humerus, supinator crest and supinator fossa of ulna
I: anterior, lateral, and posterior aspects of proximal 1/3 of radius
A: forearm supination

Question 2

Long head of triceps brachii

Answer 2

O: infraglenoid tubercle of scapula
I: olecranon of ulna and adjacent antebrachial fascia
A: elbow extension

Question 3

Medial head of triceps brachii

Answer 3

O: posterior surface of humerus, inferior to radial groove
I: olecranon of ulna and adjacent antebrachial fascia
A: elbow extension

Question 4

Lateral head of triceps brachii

Answer 4

O: posterior surface of humerus, superior to radial groove
I: olecranon of ulna and adjacent antebrachial fascia
A: elbow extension

Question 5

Brachialis

Answer 5

O: anterior aspect of distal half of humerus
I: coronoid process and tuberosity of ulna
A: elbow flexion

Question 6

Long head of biceps brachii

Answer 6

O: supraglenoid tubercle of scapula
I: radial tuberosity and antebrachial fascia
A: forearm supination, elbow flexion (elbow flexion most effective when forearm supinated)

Question 7

Short head of biceps brachii

Answer 7

O: apex of coracoid process of scapula
I: radial tuberosity and antebrachial fascia
A: forearm supination, elbow flexion (elbow flexion most effective when forearm supinated)

Question 8

Brachioradialis

Answer 8

O: superior 2/3 of lateral supracondylar ridge of humerus
I: lateral aspect of distal part of radius
A: elbow flexion

Question 9

Pronator teres

Answer 9

O: medial supracondylar ridge of humerus, via the common flexor tendon, and medial aspect of coronoid process of ulna
I: middle one third of anterolateral aspect of radius
A: forearm pronation

Question 10

Anconeus

Answer 10

O: posterior aspect of lateral epicondyle of humerus
I: olecranon, proximal end of body of ulna
A: elbow extension