<prompt> Which of the following cranial nerve nuclei is not a pa of the special visceral afferent SVA column?Facial nerveTrochlear nervevagus nerveGlossopharyngeal nerve  <response>: Trochlear nerve nucleus is not a pa of the special visceral affferent column. It is a motor nerve that innervates superior oblique muscle in the orbit. Its nucleus is a pa of the general somatic efferent GSE column. The neurons of the general somatic efferent GSE column innervate th extrinsic ocular muscles of the tongue III, IV, VI and XII cranial nerves. Functional component Cranial Nerves General Somatic Efferent SEGSE 3,4,6,12 Special Visceral Efferent SVEBrE 5,7,9,10,11 General Visceral Efferent GVE 3,7,9,10 General Viseral Afferent GVA 7,9,10 Special Visceral Afferent BrASVA 7,9,10 General somatic Afferent SAGSA 5,7,9,10 Special Somatic Afferent SSA 8 GVE represents the parasypathetic supply; so all cranial nerves having parasympathetic fibers, have the GVE component. Ref: Grays Anatomy 41st edition Pgno: 232 