Abstract: An apparatus for distal extremity rehabilitation includes a mechanical ground subassembly for disposition on a dorsal side of a patient's distal extremity, at or near a joint of the patient. The distal extremity may include the hand/wrist complex or the ankle/foot complex. The mechanical ground assembly may be constructed to match contours of the patient's distal extremity. The apparatus further includes a distal effector subassembly for disposition upon one or more distal appendages of the patient, the distal effector subassembly coupled to the mechanical ground subassembly. The apparatus also includes an LED thimble subassembly for disposition on one or more finger tips of the patient, and an LED object subassembly with which the patient interacts by manipulating the LED thimble with respect to the LED object.