Unit Four: Upper Extremity: Individual Arm Muscles

Question 1

Where does the coracobrachialis originate and insert?

Answer 1

1. Coracoid process. 2. Middle shaft of humerus.

Question 2

Where does the brachialis originate and insert?

Answer 2

1. Distal humerus. 2. Proximal ulna.

Question 3

Where does the brachioradialis originate and insert?

Answer 3

1. Lateral distal humerus. 2. Styloid process of radius.

Question 4

Where does the long and short head of the biceps brachii originate and insert?

Answer 4

1. (L) Supraglenoid tubercle of scapula. (S) Coracoid process of scapula. 2. Radial tuberosity.

Question 5

Where does the extensor digiti minimi originate and insert?

Answer 5

1. Lateral epicondyle of humerus. 2. Proximal phalanx finger 5.

Question 6

Where does the extensor digitorum originate and insert?

Answer 6

1. Lateral epicondyle of humerus. 2. Distal and middle phalanges digits 2-5.

Question 7

Where does the extensor carpi ulnaris originate and insert?

Answer 7

1. Lateral epicondyle of humerus. 2. Base of 5th metacarpal.

Question 8

Where does the extensor carpi radialis longus originate and insert?

Answer 8

1. Lateral distal humerus. 2. Base of 2nd metacarpal.

Question 9

Where does the extensor carpi radialis brevis originate and insert?

Answer 9

1. Lateral epicondyle of humerus. 2. Base of 3rd metacarpal.

Question 10

Where does the supinator originate and insert?

Answer 10

1. Lateral epicondyle of humerus and proximal ulna. 2. Anterolateral radius.

Question 11

Where does the extensor indicis originate and insert?

Answer 11

1. Posterior ulna. 2. Extensor digitorum tendon 2nd digit.

Question 12

Where does the abductor pollicis longus originate and insert?

Answer 12

1. Proximal radius and ulna. 2. Lateral 1st metacarpal.

Question 13

Where does the extensor pollicis brevis originate and insert?

Answer 13

1. Posterior radius. 2. Proximal phalanx of thumb.

Question 14

Where does the extensor pollicis longus originate and insert?

Answer 14

1. Posterior ulna. 2. Distal phalanx of thumb.

Question 15

Where does the pronator teres originate and insert?

Answer 15

1. Medial epicondyle of humerus. 2. Lateral radius.

Question 16

Where does the flexor carpi radialis originate and insert?

Answer 16

1. Medial epicondyle of humerus. 2. Base of 2nd and 3rd metacarpals.

Question 17

Where does the palmaris longus originate and insert?

Answer 17

1. Medial epicondyle of humerus. 2. Palmar aponeurosis.

Question 18

Where does the flexor carpi ulnaris originate and insert?

Answer 18

1. Medial epicondyle of humerus. 2. Medial carpal and metacarpal bones.

Question 19

Where does the flexor digitorum superficialis originate and insert?

Answer 19

1. Medial epicondyle of humerus. 2. Middle phalanges of digits 2-5.

Question 20

Where does the flexor pollicis longus originate and insert?

Answer 20

1. Anterior shaft of radius. 2. Distal phalanx of thumb.

Question 21

Where does the pronator quadratus originate and insert?

Answer 21

1. Distal ulna. 2. Distal radius.

Question 22

Where does the flexor digitorum profundus originate and insert?

Answer 22

1. Anteromedial ulna. 2. Distal phalanges, digits 2-5.