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Functional wrist-hand upper-limb orthoses designed to grasp and release object using a mechanism powered by the wrist extensor muscles. These orthoses typically consist of prefabricated devices including a semi-rigid cuff or sleeve fixed at the forearm with one or more straps, soft pads or bands fixed on the hand, and a mechanism that transmits power from the wrist extensors to the weak or disabled finger muscles. These devices permit closing the hand in several discrete positions and making it possible to pinch objects between the fingers and thumb. Wrist-driven functional orthoses are used for daily activities such as feeding, grooming, and writing by patients with paralysis or severe weakness of the hand and wrist muscles.
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