Which tests assess pinch strength and what do they reflect?

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Pinch strength testing focuses on the intrinsic muscles of the hand that power precise pinch grips. Tip pinch and the three-jaw chuck specifically require the thumb to oppose and stabilize against the pads of the fingers, engaging intrinsic muscles such as the adductor pollicis and interossei to produce a controlled pinch. This is why these tests best reflect intrinsic hand function, which is essential for fine manipulation tasks. In contrast, a grip strength dynamometer measures gross hand strength driven largely by larger extrinsic muscles, dexterity tests assess coordination and speed rather than pinch force, and thumb abduction strength mainly reflects median nerve–related thenar function rather than the full pinch mechanism.