Thoracic Limb: Actions & Innervations (Exam 1)

Question 1

Name all muscles that are innervated by the Musculocutaneous N.

Answer 1

biceps brachii M
brachialis M

Question 2

Name all muscles that are innervated by the Radial N.

Answer 2

triceps brachii M
anconeus M
tensor fasciae antebrachii M
extensors
extensor carpi radialis M
common digital extensor M
lateral digital extensor M
extensor carpi ulnaris M
extensor carpi obliquus M

Question 3

Name the 4 muscles innervated by the Ulnar N.

Answer 3

superficial digital flexor M
deep digital flexor M (humeral + ulnar head)
flexor carpi ulnaris M
interosseus III & IV

Question 4

Which muscles are innervated by only the palmar branches of the Ulnar N?

Answer 4

interosseus III & IV M

Question 5

Name the 4 muscles innervated by the Median N.

Answer 5

DDF (humeral + radial head)

Flexor carpi radialis

Question 6

Name the muscles innervated by the Median N.

Answer 6

DDF (humeral + radial head)
flexor carpi radialis M
pronator teres M
interflexorii M

Question 7

Action of Biceps brachii M

Answer 7

1. extend shoulder
2. flex elbow

Question 8

Action of Brachialis M

Answer 8

flex elbow

Question 9

Action of Triceps brachii M

Answer 9

1. extend elbow
2. propulsor of limb

Question 10

Action of Anconeus M

Answer 10

extend elbow

Question 11

Action of Tensor fasciae antebrachii M

Answer 11

1. extend elbow
2. flex shoulder