Human-Inspired Reflex to Autonomously Prevent Slip of Grasped Objects Rotated with a Prosthetic Hand

Figure 3

The grasped and rotated items includes (1) copper tube (262 g), (2) paintbrush (57 g), (3) full soda can (386 g), (4) compliant sheet metal (164 g), (5) stress football (25 g), and (6) aluminum block (461 g) equipped with a LED to indicate if the object was squeezed too tightly during the human trials. The superimposed white thumbprint shows how the item was grasped.