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Experimental records from an SAII afferent to trapezoidal compression ramps delivered to the pad of the receptor-bearing digit at 2 N/s. Responses to 1-, 2- and 4-N forces are shown for a firm surface (surface 6) before (A) and after venous occlusion (B). Venous occlusion reduced the sensitivity of the afferent. Note that the spike amplitude was slightly higher following occlusion due to a mechanical shift in the tip of the microelectrode.
