micro-injections of horseradish peroxidase-conjugated wheatgerm agglutinin into this area of cholinergic perikarya led to retrograde labelling of a large population of neurons within the pontomesencephalic tegmentum , which included cells in the ventral tegmental area , substantia nigra , retrorubral field , raphe nuclei , reticular formation , pedunculopontine tegmental nucleus , laterodorsal tegmental nucleus , parabrachial nuclei and locus coeruleus nucleus .
C0007634
cells
C0007610
nucleus