![]() The tendons in your hand are covered by a layer of synovium, the same tissue that lines your joints. Small muscles in your hand (the lumbricals and interossei) allow fine movement.The extensors on the outside or back of your forearm allow the hand to open up.The flexor group, on the inside or front of the arm, control bending of your fingers and wrist – these pass over the front of your wrist and are held in place by a strong fibrous band called the flexor retinaculum, or carpal tunnel ligament. ![]() ![]() The movement and power of your hand and wrist are controlled by muscles and tendons:
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