Nerv tolalari 'V gorinchaning dorzal sohasidagi yugori yelkanning velum medullari superior sohasi, miya oyogchalarining tashqi yuzasidan chigib, ko'z kosasiga yugorigi tirqish — fissura orbitalis superior orgali o‘tadi. Ko‘z soqqasining yuqon qiyshiq mushagi — m. obliquus oculi superior ni innervatsiya etadi