within this region , the th-positive cells belong to two subgroups : ( 1 ) a relatively well-defined population of cells aggregated in the reticular formation ( corresponding to cell group a8 of dahlstrom and fuxe , '64 ) , and ( 2 ) a more loosely defined group of cells that appears to be continuous with the cells of the nucleus raphe linearis .
C0007634
cell
C0007610
cells of