11-16-2011, 08:46 AM
some points that always confuse us:
lesion of CN III: eyeball abducted (external strabismus) : due to unopposed action of lateral rectus (CN VI) and superior oblique(CN IV)
lesion of CN VI: medial deviation of eye due to unopposed action of Medial Rectus (CN III)
lesion of CN XII: tongue deviated to the affected side due to unopposed action of genioglossus on the normal side. ( normal function of genioglossus is protrusion of tongue)
lesion of CN III: eyeball abducted (external strabismus) : due to unopposed action of lateral rectus (CN VI) and superior oblique(CN IV)
lesion of CN VI: medial deviation of eye due to unopposed action of Medial Rectus (CN III)
lesion of CN XII: tongue deviated to the affected side due to unopposed action of genioglossus on the normal side. ( normal function of genioglossus is protrusion of tongue)