The right eye's efferent nerves are working, as left eye stimulation causes a change in the right eye.
The right eye optic n. damage causes it's afferent n. to be damaged. It can't carry info to brain, so right and left eye can't constrict to light.
nbme_123Can someone please explain why it cant be the Right Edinger Westphal nucleus?+1
chaosawaitsBut if right optic nerve doesn't work, why does it dilate normally in the dark to 6 mm?+1
pakimd@nbme_123 im not sure if im correct but i think the reason why right edinger westphal nucleus is not the correct answer is because the left edinger westphal nucleus sends one axon to the right edinger westphal nucleus and one to right pretectal nucleus so that way damage to right edinger westphal will still result in relaying of efferent innervation to the right eye+
submitted by โaliyah(51)
The right eye's efferent nerves are working, as left eye stimulation causes a change in the right eye. The right eye optic n. damage causes it's afferent n. to be damaged. It can't carry info to brain, so right and left eye can't constrict to light.