Abstract: Drive device (1) for a finger prosthesis (2) of substantially natural size designed to bend the finger prosthesis (2) about a shaft (A) relative to a fixing (3) e.g. in a human or artificial metacarpus (4). The drive device (1) comprises a motor (6) which can be connected to an energy source e.g. a battery, and a transmission (5, 7, 8) intended to transform a force from the motor (6) to the finger prosthesis (2) to perform the movement. The motor (6) and transmission (5, 7, 8) are placed in the finger prosthesis (2) so that the bending shaft (A) is contained in the finger prosthesis (2) or in its extension at the fixing (3).

Abstract: Arrangement (1) for a hand prosthesis (2), which hand prosthesis (2) is adapted to replace a lost human hand on a human or artificial lower arm (3). The arrangement (1) is mounted between a wrist part (2a) and a lower arm (3). In addition the arrangement (1) has means for effecting tilting or turning of the hand part (2) relative to the lower arm (3).