Figure 4.

Hippocampal inactivation disrupts renewal of fear in contexts that are uninformative as to the meaning of the CS. Mean (± SEM) percentage of freezing during the first minute after CS onset during testing. Rats were tested either in the same context in which extinction took place (CON, open bars) or in the context in which no CS-alone presentations were given during the extinction phase of training (INCON, filled bars). Data are separated by whether rats were tested in a context with an ambiguous history of CS presentations (AAA/AAB renewal; left) or in an unambiguous context (ABA/ABB renewal; right).