Abstract
Bilateral lesions of the amygdaloid complex
result in elimination or attenuation of the
conditioned freezing that is normally seen in the
conditioned emotional response (CER) paradigm
and the active avoidance (AA) task. We observed
the effect of amygdalar tissue transplantation
on the ability of lesioned (central nucleus of
amygdala, CeA) rats to learn CER and AA. In
two groups of adult Wistar rats, sham operation
or bilateral lesions of the CeA were produced
electrolytically (2mA for 8 sec). In a third group,
fetal amygdalar tissue was transplanted at the
CeA-lesioned site 2 d postoperatively. All rats
were trained on CER and AA from the