<P> A conditioned fear response may be inherited transgenerationally at behavioral, neuroanatomical and epigenetic levels . This has been shown in experiments that use Acetophenone to examine the inheritance of parental traumatic exposure (odor fear conditioning). In these experiments, acetophenone's odor was shown to activate an odorant receptor (Olfr151) in mice . </P> <P> The learning involved in conditioned fear, as well as the underlying neurobiology, changes dramatically from infancy, across childhood and adolescence, into adulthood and aging . </P>

Classical conditioning of a fear response would result in changes in which area of the brain