part of part of neural nucleus pontine tegmentum brainstem nucleus hindbrain nucleus nucleus incertus Inc MBA:604 DHBA:146034972 charles Watson. - 5th ed.) NLX:144477 central Gray pars 0 NI nucleus incertus (Streeter) neuronames:1093 NI, CG0, CGalpha, CGbeta central Gray part alpha DMBA:17084 Distinct cell group in caudoventral regions of the pontine periventricular gray, adjacent to the ventromedial border of the caudal dorsal tegmental nucleus. UBERON:0035973