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Now we’ll move on to look at the muscles of the hand. We’ll begin by looking at the extrinsic muscles, the long muscles of the hand which lie in the forearm. Then we’ll move on to look at the intrinsic muscles, the short muscles that lie in the hand. Starting with the extrinsic muscles, then, we’ll look first at the flexors of the fingers, then at the extensors of the fingers, and lastly we’ll look at the four long muscles of the thumb.