Muscle Practice- Arms & Forearms

This picture shows the anterior & medial view of the forearm. This makes all of these muscles FLEXORS! Label the following muscles. (Hint: think Pass, fail, pass, fail- start on the thumb side and move medially)

• A

• Pronator teres

• D

• Flexor carpi radialis

• C

• Palmaris longus

• B

• Flexor carpi ulnaris

This shows 2 of the deeper flexor muscles. Muscle E is just deeper than the palmaris longus. Muscle E is the ​ ​ (a)   . Muscle F is the deepest of all the flexor muscles and is called the ​ (b)  

• flexor digitorum superficialis
• flexor digitorum profundus
• flexor digitorum superior
• flexor digitorum inferior

The brachioradialis is a large significant extensor muscle on the posterior side of the forearm. Which of the letters shown indicates the brachioradialis?

• C

• D

• G

• H

If you can locate the brachioradialis, then naming the extensor muscles moving laterally from there is easy. Just remember LBLB! Can you match the extensors with the correct letter?

• B or J

• Extensor carpis radialis Longus

• H

• Extensor pollicis Brevis

• C

• Brachioradialis

• A or I

• Abductor pollicis Longus

• G

• Extensor carpi radialis

  Brevis

This picture shows the posterior aspect of the forearm. There are 3 extensor muscles running down the back of the forearm. Muscle D is the ​ . (a)   . Moving toward the pinky, the next muscle (E) is the ​ (b)   and finally Muscle F is the ​ (c)  

• extensor digitorum
• Extensor Digiti Minimi
• extensor carpi ulnaris
• brachioradialis
• extensor carpi radialis

The muscles of the forearm are primarily responsible for the movement of the fingers and wrists. The muscles responsible for flexing on one side while the those that extend on the other. Sort these muscles into which side of the arm they are found.

Groups:

(a) Anterior Side

,

(b) Posterior Side

• flexor digitorum profundus

• palmaris longus

• extensor carpi ulnaris

• abductor pollicis longus

• flexor carpi ulnaris

• extensor digitorum

• flexor carpi radialis

• extensor carpi radialis brevis

• flexor digitorum superficialis

• flexor pollicis longus

• extensor carpi radialis longus

• extensor pollicis longus

• extensor digiti minimi

• pronator teres

Label the following muscles of the upper arm.

• C

• deltoid

• D

• biceps brachii

• A

• triceps brachii

• B

• brachialis

Match the following muscles with their functions.

• extends forearm & arm

• 
• flexes forearm

• 
• flexes & supinates forearm

• 
• flexes arm

•