An apparatus for passive extension and flexion of at least one finger of a patient with an upper arm unit, a lower arm unit, and at least one connective line. The apparatus is configured such that elbow extension of the patient promotes finger flexion. This is accomplished by taking advantage of the geometry of the arm, where the distance from a point on the patients humeral area to the patients fingers is greater when the patients arm is in extension than when it is in flexion. In one aspect, the upper arm unit is configured to connect to a portion of the patients arm between the patients elbow and shoulder and the lower arm unit is configured to connect to a portion of the patients arm intermediate the patients hand and elbow.
