In Brief:
While it is possible that only the biomimetic approach can accomplish all possible functions of the hand including communication, sensory experiences, manipulation, and grasp, other approaches with simpler controls or mechanisms have not been thoroughly explored. This study assessed normal ranges of motion and finger positions during standardized grasp activities. Results showed that design criteria for prosthetic terminal devices used specifically for grasping activities might focus on specific aspects of hand motion to reduce complexity or cost of the device.
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