moreover , a preliminary study shows that , in the lenniscus medialis , nucleus interpreduncularis paramedialis and pontine nuclei , more than 50 % of the labelled , presumably serotonergic cells are in direct contact with blood vessels , while in the raphe dorsalis and nucleus interpeduncularis dorsalis the percentage is only 20 to 25 % .
C0007610
nucleus
C0007634
cells