Muscles

Question 1

Which muscle of the anterior arm has dual innervation? Name the 2 nerves.

Answer 1

Brachioradialis

1. Radial nerve
2. Musculocutaneous nerve

Question 2

Which head of the triceps supports the abducted humerus?

Answer 2

The long head

Question 3

Which two arteries supply the brachialis?

Answer 3

Brachial artery

Recurrent Radial artery

Question 4

True or false: The lateral epicondyle of humerus is more prominent than the medial epicondyle.

Answer 4

false

Question 5

Which muscle provides the main gripping power of the hand?

Answer 5

Flexor digitorum profundus

Question 6

State the two nerves innervating flexor digitorum profundus.

Answer 6

anterior interosseous nerve

ulnar nerve

Question 7

Which head of the Pectoralis major forms most of the axilla’s anterior wall?

Answer 7

Sternocostal head

Question 8

Deltopectoral groove formed by which muscles?

Answer 8

Deltoid medial border

Sternocostal head of pectoralis major lateral border

Question 9

Name the 2 upper limb muscles supplied by all 5 spinal segments.

Answer 9

Pectoralis major and minor

Question 10

The key muscle of the axilla is?

Answer 10

Pectoralis minor; divides axillary artery into 3 parts

Question 11

Boxer’s muscle

Answer 11

Serratus anterior