Amygdala kindling disrupts trace and delay fear conditioning with parallel changes in Fos protein expression throughout the limbic brain

Highlights • We studied the effect of short- and long-term kindling on fear learning and memory. • Kindling disrupted conditioned fear in a stimulation- and task-specific manner. • Kindling also decreased Fos expression in several brain regions. • Kindling-induced disruptions in conditioned fear were correlated with dampened Fos expression. • Kindling promotes functional changes within the hippocampus and amygdala.