immunoreactive perikarya were found in many hypothalamic and thalamic nuclei , interpeduncular nucleus , substantia nigra , the colliculi , periaqueductal gray , parabrachial nuclei , trigeminal motor and spinal nuclei , nucleus raphe magnus and other raphe nuclei , nucleus reticularis paragigantocellularis , vestibular nuclei , several noradrenergic cell groups , nucleus tractus solitarius , as well as in the spinal cord dorsal horn .
C0007610
nucleus
C0007634
cell