Session 28 - The Anterior Forearm and Wrist

Question 1

Name the three major superficial veins of the forearm. What course do they take?

Answer 1

Cephalic Vein
Dorsum of hand -> Cubital fossa -> Basilic vein (by median cubital vein) -> Axillary vein

Basilic Vein
Dorsum of hand -> median cubital vein -> Basilic vein -> Brachial vein

Question 2

Look up path of Cephalic and Basilic vein

Answer 2

:-)

Question 3

Name the three major nerves that enter the forearm. What muscle compartments
do they supply?

Answer 3

Radial - Motor - Posterior compartment

Median - Motor - LLOAF Muscles of the hand

Ulnar - Motor - 
Flexor carpi ulnaris Ulnar half of flexor digitorum profundus
Adductor pollicis 
Hypothenar eminence
Medial lumbricles
Interossei 

(All except LLOAF)

Question 4

What are the LLOAF muscles of the hand?

Answer 4

Lateral lumbricles
Opponens pollicis
Abductor pollicis brevis
Flexor pollicis brevis

Question 5

Where is the common flexor origin?

Answer 5

Medial epicondyle of the humerus.

Question 6

How would you test the muscles of the forearm supplied by the median nerve?

Answer 6

 Assess flexion of the thumb and lateral two fingers.
 Assess movement of the thumb under the control of the thenar eminence
muscles.

Question 7

Where are the brachial, radial and ulnar pulses palpable?

Answer 7

 Brachial - medial to the bicipital aponeurosis (medial aspect of the cubital
fossa)
 Ulnar - lateral aspect of the wrist.

Question 8

Which pulse is easiest to palpate and why?

Answer 8

Radial - Superficial and can be compressed against the radial bone

Question 9

Which muscles allow pronation and supination? Make sure you can demonstrate
these movements.

Answer 9

 Supination positions the forearm and hand in the anatomical position.

 Supinator and Biceps - Supinate

 Pronation positions the forearm and hand in the anatomical position.

 Pronator teres and pronator quadratus
produces pronation.