A. Mechanical threshold of nociceptors innervating the gastrocnemius muscle, from water-avoidance stress-exposed (n = 26) and control rats (n = 40). Muscle nociceptors in water-avoidance-exposed rats had significantly lower mechanical thresholds than nociceptors from naïve control rats (P<0.05, Welch’s correction for the Student’s t-test).
B. Scattergram of mechanical thresholds of individual muscle nociceptors from naïve control and water-avoidance stress-exposed rats.