Muscles of the dorsal (posterior) arm

Question 1

3 muscles

Answer 1

Triceps brachii
Anconeus
Brachioradialis

Question 2

Triceps brachii origin long head

Answer 2

infraglenoid tubercle of the scapula

Question 3

Triceps brachii origin lateral head

Answer 3

posterior humerus superior to the radial groove

Question 4

Triceps brachii origin Medial head

Answer 4

posterior humerus inferior to the radial groove

Question 5

Triceps brachii Insertion

Answer 5

Proximal olecranon of the ulna and antebrachial fascia

Question 6

Triceps brachii Nerve

Answer 6

Radial nerve

Question 7

Triceps brachii Blood Supply

Answer 7

Brachial artery

Question 8

Triceps brachii Action

Answer 8

Chief extensor of the forearm at the elbow, helps extends the shoulder

Question 9

Anconeus Origin

Answer 9

Lateral Epicondyle of the humerus

Question 10

Anconeus Insertion

Answer 10

Lateral ulna at the olecranon process

Question 11

Anconeus Nerve

Answer 11

Radial nerve

Question 12

Anconeus Action

Answer 12

Assists the triceps with extension of the elbow; stabilizes the joint

Question 13

Brachioradialis Origin

Answer 13

Lateral Supracondylar ridge of the humerus

Question 14

Brachioradialis Insertion

Answer 14

Lateral styloid process of the distal radius

Question 15

Brachioradialis Nerve

Answer 15

Radial nerve

Question 16

Brachioradialis Action

Answer 16

1. Flexion of the elbow if the forearm is pronated it can initiate supination
2. if the forearm is supinated it can initiate pronation
3. Brachioradialis is a flexor, but belongs to the extensor compartment