Forty-six studies on aversive conditioning and/or extinction, with forty studies on delay conditioning (including seven studies on extinction), two studies on trace, and four studies on delay and trace conditioning, with focus on main results of acquisition and/or extinction of conditioned responses (in alphabetic order).

<p>Abbreviations: ACC: anterior cingulate cortex, ant: anterior; BA: Brodman area, cau: caudal, C: cortex, CR: conditioned response, CS: conditioned stimulus, dor: dorsal, DPFC: dorsal prefrontal cortex, DLPFC: dorsolateral prefrontal cortex, DMPFC: dorsomedial prefrontal cortex, EMG: electromyography, F: female, FOP: frontal operculum, G: gyrus, inf: inferior, IAPS: International Aversive Picture System, IPL: inferior parietal lobe, lat: lateral, L: left, Lo: lobule/lobe, M: male, med: medial, mid: middle, MFL: medial frontal lobe, MPFC: medial prefrontal cortex, MTL: medial temporal lobe, N: nucleus, No.: number, OFC: orbitofrontal cortex, post: posterior, PCC: posterior cingulate cortex, PFC: prefrontal cortex, PMA: premotor area, R: right, rCBF: regional cerebral blood flow, trans: transverse, RT: reaction time, ros: rostral, SCR: skin-conductance response, SCL: skin-conductance level, SI: primary somatosensory cortex, SII: secondary somatosensory cortex, SMA: supplementary motor area, S: sulcus; sup: superior, vent: ventral, VMPFC: ventromedial prefrontal Cortex, US: unconditioned stimulus.