The effects of GABA and THIP on picrotoxinin-sensitive [35S]TBPS binding in serial frontal sections of rat brain. BrS, brain stem; G, gelatinosus nucleus of thalamus; Gr, granule cell layer of cerebellum; nRT, reticular nucleus of thalamus; Th, thalamus; VL, ventrolateral thalamus; VPL, ventroposterolateral thalamus; SN, substantia nigra. Representative images were scanned and processed using identical scaling for brightness and contrast; the basal images were scanned from films after 2-day exposure and the other images from films after 21-day exposure.