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Rats with pretraining BA lesions could retain fear memory for 8 d. The percentages offreezing to the tone on test days 2 and 10 for the pretraining with delay (left) and post training (right) experiments are shown. Rats with pretraining BA lesions (n = 5) could retain conditioning memory for 8 d, ruling out the passage of time after recovery from surgery as the cause of blocked expression with posttraining lesions. Error bars indicate SEM. L, lesion.
