(A, B) Representative photomicrographs of the ipsilateral (lesioned) and contralateral (intact) rEPN and vlLH immunostained for the neuronal marker NeuN (black label). (C) Representative photographs of footshock-induced cFos (black label) in the LHb and RMTg with methyl green counterstain. (D) Number of cells dramatically decreased in the entire rEPN, on the lesioned side, with smaller reductions in vlHL, CeA and ZI. (E) rEPN lesion reduced cFos expression induced by unsignaled footshocks in the ipsilateral LHb and RMTg, compared with contralateral (intact) side. Scalebars are 1 mm in top panels for A), (B), and 100 µm in all other panels.