What is the function of a hand orthosis for a stroke patient?

Hand orthoses for stroke patients are designed primarily to enhance hand function and prevent contractures. After a stroke, patients often experience weakness, spasticity, and loss of coordination in their affected hand, which can lead to complications such as muscle shortening or permanent contractures if not properly managed.

The correct answer highlights that these orthoses are intended to provide support while still allowing for some movement and activity, facilitating rehabilitation. By maintaining an optimal hand position, the orthosis can encourage functional use of the hand during activities of daily living and therapies. It also aids in preserving the range of motion and preventing stiffness in the joints.

The other potential functions listed, such as complete immobilization or automatic exercise of hand muscles, do not align with the goals of rehabilitation for stroke patients. Complete immobilization could limit recovery and functional improvement, while the idea of automatically exercising hand muscles suggests a passive approach that does not promote the active engagement necessary for beneficial rehabilitation outcomes.