Fig. 6.     Proposed forebrain circuits involving the cortex, basal ganglia and BFC neurons. Upper row: primate, lower row: rat. Data from Alexander et al. (l986), Groenewegen et al., (1990), Haber et al. (l990). Thick arrow marks the cholinergic link. Abbrev. A = amyg-dala; ACg = anterior cingulate cortex; AId = dorsal agranular insular cortex; c-MD = mediodorsal thalamic nucleus, central part; d-GP = globus pallidus, dorsal part; dm-CAUD = caudate nucleus, dorsomedial part; dm-VP = ventral pallidum, dorsomedial part; E = entorhinal cortex; GPi = globus pallidus, internal segment; H = hippocampus; l-ACb = nucleus accumbens, lateral part; l-MD = mediodorsal thalamic nucleus, lateral part; l-VP = ventral pal-lidum, lateral part; LOF = lateral orbitofrontal cortex; m-ACb = nucleus accumbens, medial part; m-MD = mediodorsal thalamic nucleus, medial part; m-VP = ventral pallidum, medial part; MDmc = mediodorsal thalamic nucleus, magnocellular division; MOF = medial orbitofrontal cortex; PRE = prelimbic cortex; vl-CAUD = caudate nucleus, ventrolateral part; vm-CAUD = caudate nucleus, ventromedial part; vm-PUT; putamen, ventromedial part; VA = ventral anterior thalamus.