analysis of sections incubated with antiserum to serotonin showed that a majority of the retrogradely-labelled versus serotonin-immunoreactive cells was found to vary within different parts of the individual raphe nuclei : the ventromedial part of the dorsal , the medial part of the median and the nucleus reticularis tegmentipontis being the highest .
C0007634
cells
C0007610
nucleus