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Fig. 4. Area of the field potential equivalent to the sensory response (FPSR)
negative peak as a cylindrical object (metal or plastic, oriented
perpendicular to the skin) was moved from rostral to caudal along the body,
passing through the center of the receptive field (gray bar, 0 mm). The
horizontal dotted line indicates the area of the FPSR negative peak in the
absence of any object, as a control value.