The extensor carpi ulnaris muscle is a key muscle that extends the hand at the wrist joint.
Here's a more detailed breakdown:
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Extensor Carpi Ulnaris (ECU): This muscle, located on the ulnar (pinky finger) side of the forearm, primarily extends and adducts the wrist. It works in conjunction with other wrist extensor muscles to perform extension.
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Synergistic Action: The extensor carpi ulnaris does not work alone. It is assisted by other muscles like the extensor carpi radialis longus and extensor carpi radialis brevis in extending the hand. These muscles work together to provide a balanced and effective wrist extension.
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Other Wrist Extensors: While the extensor carpi ulnaris is the primary muscle directly identified in the provided reference, other muscles also contribute to wrist extension.
In summary, while several muscles contribute to extending the hand at the wrist, the extensor carpi ulnaris is a significant one.
