<prompt> Which of the following nerve nucleus underlies the facial colliculus?AbducentVestibulocochlearFacialTrigeminal  <response>: Ans. a. Abducent Ref: Grays anatomy 40e p240; Netter Collection of Medical Illustrations 2013Volume-7178 Abducent nerve nucleus underlies the facial colliculus.Facial colliculus is situated in the pons. It overlies the abducent nucleus. The facial nerve originates from its nucleus and goes around the abducent nerve. This is called as neurobiotaxis. - Grays anatomy 40e p240On each side of the median sulcus is a longitudinal elevation, the medial eminence, lateral to which lies sulcus limitans. Its superior part is the locus ceruleus, coloured bluish-grey from the patch of deeply pigmented nerve cells. Also lateral to the upper part of the medial eminence is a slight depression, the superior fovea, and just below and medial in this fovea is a rounded swelling, the facial colliculus, which overlies the nucleus of the abducens VI nerve and the facial VII nerve fibers encircling in the motor nucleus of the facial nerve lies more deeply in the pons. Inferolateral to the superior fovea is the upper part of the vestibular area, which overlies parts of the nuclei of the vestibulococchlear VIII nerve. Netter Collection of Medical Illustrations 2013Volume-7178 