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The anatomy of the forearm muscles is important in performing amputation of the hand. This sequence shows the relationships of the forearm muscles above the level of amputation. Particular attention should be paid to the neuromuscular bundles in relation to the muscles. Note the deep layer muscles of the volar side (flexor pollicis longus and flexor digitorum profundus) and the superficial layers (flexor digitorum superficialis, flexor carpi radialis, flexor carpi ulnaris, and pronator teres).
The cross-section is shown in the intact forearm. In addition to the radial and ulnar neurovascular bundles, the larger named cutaneous nerves shown in the figure should be sought, put on traction, and sharply cut to retract away from the skin edge to avoid a post-operative neuroma.
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