Two-point tactual discrimination on the back: a signal-detection approach.
This investigation determined if subthreshold two-point aesthesiometer separations could be discriminated from one-point on the back, using a fixed-based matching signal detection technique. Subjects reliably discriminated two-point separations as small as 2 mm from one point on the back. In addition, the back appears to be more sensitive to discriminating two points from one point than the dorsal forearm.
D001415:Back; D004193:Discrimination Learning; D006801:Humans; D008297:Male; D012684:Sensory Thresholds; D014110:Touch