The extrinsic hand muscles originate in the forearm and power many of the movements responsible for grip strength, wrist motion, finger flexion, and finger extension. These muscles work through long tendons that cross the wrist into the hand, allowing both forceful and precise movements used in sports, lifting, and daily activities. Pathology involving these structures can contribute to conditions such as lateral epicondylitis, De Quervain tenosynovitis, trigger finger, and tendon overuse injuri
0:39
The extrinsic hand muscles originate in the forearm and power many of the movements responsible for grip strength, wrist motion, finger flexion, and finger extension. These muscles work through long tendons that cross the wrist into the hand, allowing both forceful and precise movements used in sports, lifting, and daily activities. Pathology involving these structures can contribute to conditions such as lateral epicondylitis, De Quervain tenosynovitis, trigger finger, and tendon overuse injuri
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