Fig. 1

The device for quantitative analyses of perception and painful sensations and its probe. Indicated the device for quantitative analyses of perception and painful sensations, (a) The PainVision® PS-2100 N main device, (b) fingertip probe, and (c) attached fingertip probe. When the subject sensed the electric current for the first time or sensed the electric current as pain, the subject pushed a hand switch. The current at these point were determined as the lowest perceptible current and the pain perception current, respectively