Figure 3. Examples of plasticity processes in the amygdala as part of learned aversion. Far left: Simplified sketch of the amygdala with important connections Middle: Histograms of neuronal activity showing enhanced short-latency auditory responses of lateral amygdala neurons after training [According to Quirk et al., 1995] Far right: Enhancement of amygdala auditory-evoked response properties (slope and amplitude) after electrically induced long term potentiation [According to Rogan and LeDoux, 1995] compared with increase of human brainstem component V recorded after preceding 10 minutes series of impulse noise (96 dB peak, 80 dB Leq,10min) [According to Spreng, 1985].