Fig. 4.

Dose-dependent effect of h/rCRF injected i.h. or i.s. Context- and tone-dependent fear conditioning of mice injected i.h. (a) or i.s. (b) 5 min before training was determined 24 hr later. Statistically significant differences: *p < 0.01 versus aCSF; **p < 0.001 versus aCSF.