a, Sample slices displaying the expression of ChR2-mCherry (red) in BLA (larger image) and cNAc (smaller image) after virus injection in the BLA. Scale bars represent 0.5 mm. b-e, Optical stimulation-evoked d2SPN AMPA/NMDA receptor responses (A/N ratio) were inhibited in SNI (n = 7–8 neurons from 5 mice per group; U = 9, p = 0.0289), but no change was detected in d1SPNs (j, n = 6 neurons from 5 mice per group with U = 17, p = 0.8983). b and d AMPA and NMDA receptor-mediated currents elicited in the cNAc SPNs with optical stimulation of BLA inputs (calibration: 50 pA, 100 ms). f, Sample images displaying the expression of ChR2-mCherry (red) in prelimbic (PL)-PFC and cNAc after virus injection in BLA (scale bar: 0.5 mm). g-j, Optically evoked d2SPNs AMPA/NMDA receptor responses were enhanced in SNI, but no change was detected in d1SPNs (n = 6 neurons from 5 mice per group, Mann–Whitney U test with U = 2, p = 0.0087 for c and U = 16, p = 0.8182 for e). g and i showed the representative AMPA and NMDA receptor-mediated currents elicited in the cNAc SPNs with optical stimulation of PL inputs (calibration: 50 pA, 100 ms). Data are presented as whisker box plots displaying median, lower and upper quartiles, and whiskers representing minimum and maximum of the data.