Abstract: A haptic perception system for a hand prosthesis. The haptic perception system includes a stereognosis unit, a proprioception unit, and one or more processors. The stereognosis unit includes a plurality of pressure sensors attached onto an external surface of the hand prosthesis, a plurality of passive magnetic tags embedded in a hypoderm tissue of a residual limb of the amputee, and a plurality of electromagnetic coils attached onto a skin of the residual limb of the amputee. When a first electromagnetic coil is activated, a first passive magnetic tag moves toward the first electromagnetic coil and, to thereby, stimulates pressure sensory receptors present in the hypoderm tissue of the residual limb.

Abstract: A prosthesis to replace a flexor tendon pulley. The prosthesis comprises a tendon holding member with a hollow cylindrical shape and a connecting plate attached to the tendon holding member. The tendon holding member is configured to receive and hold a tendon of the human hand. The connecting plate is configured to be attached to a phalange of the human hand. The tendon holding member comprises an outer layer on an outer surface of the tendon holding member and an inner layer on an inner surface of the tendon holding member. The outer layer comprises hydroxyapatite to secure the tendon holding member to the surrounding tissues. The inner layer comprises of hyaluronic acid to secure the tendon holding member to the surrounding tissues.