Fig. 4From: Diurnal variation in the core interthreshold zone and its relation to cutaneous sensation threshold zoneDiurnal variation in the cutaneous sensation threshold zone measured with 1- and 2-cm2 probes. The CSZ measured with the 2-cm2 probe showed no diurnal variation. By contrast, the CSZ measured with the 1-cm2 probe showed a significant increase (p < 0.01) from the morning to the afternoon sessions in the multiple-day experimentBack to article page