<prompt> Which nucleus is under facial colliculus?FacialGlossopharyngealAbducentTrigeminal  <response>: Ans. is c i.e., Abducent o Facial colliculus is a small elevation in the pons, produced by genu recurring fibers of facial nerve looping around covering abducent nucleus. o Facial colliculus produces medial eminence on each side of median sulcus in 4th ventricle. 