Fig. 1From: Alteration of serotonin release response in the central nucleus of the amygdala to noxious and non-noxious mechanical stimulation in a neuropathic pain model ratChanges in pain threshold after left L5 nerve ligation. Ordinate: 50% paw withdrawal threshold. Abscissa: days after ligation. Day 0 was the day of ligation. Closed circles, withdrawal of the right paw (non-ligated side); open circles, withdrawal of the left paw (ligated side); ***p < 0.001 vs. pre-ligation value (day 0). n = 13Back to article page