Time course of serum corticosterone levels in response to CCI of the right sciatic nerve. Basal corticosterone levels (day 0) were highest in FIS and lowest in LEW rats, however without reaching significance levels due to a high variance in the FIS strain. Induction of neuropathy led to an increase of the corticosterone concentration in all three strains in the first days. The levels subsequently decreased and ended up below baseline values in FIS rats or above in LEW. Data are shown as mean ± s.e.m.