Fig. 2From: Development of a 4D hand gripping aid using a knitted shape memory alloy and evaluation of finger-bending angles in elderly womenAngle measurement posture and method using a 3D scanner. a Relaxed posture, b gripping a ball, and c grip posture for angle measurement (α: the external bending angle of the second joint connected to the first joint, and β: the external bending angle of the first joint)Back to article page