I.E.2 Forearm, Carpal Region & Hand: Forearm Flexors & Extensors

I.E.2 Forearm, Carpal Region & Hand: Forearm Flexors & Extensors: Page 4 of 5

Step 10: Rotate to an anterior cadaveric view of the posterior forearm.

The posterior compartment controls the extensor or dorsum of the wrist and hand.

Add the deep layer of the posterior forearm:

Step 11: Add the extensor indicis.

	What does this muscle allow you to do?
Point with your index finger.

	Step 12: Add the extensor pollicis longus.
	Step 13: Add the extensor pollicis brevis.
	Step 14: Add the abductor pollicis longus.

	What are the functions of these muscles?
They extend and abduct the thumb.

Step 15: Add the supinator.

The opposite of pronation is supination. Supination is the anatomic position.

	To return from pronation to supination, what must happen?
The radius must rotate back to its original position.
	Looking at the cadaver, or a skeleton, which muscles work to accomplish maneuver?
The supinator and the biceps brachii.