there are discrete intranuclear distributions of raphe neurons that project to these forebrain and brainstem sites , and there is an overall rostrocaudal topographic order within the raphe with neurons projecting to the neostriatum , amygdala , and substantia nigra residing most rostrally and neurons projecting to the hippocampus and/or locus coeruleus occupying caudal portions of the b6 and superior central nuclei .
C0006121
brainstem
C0034671
raphe