<Li> The ipsilateral direct reflex is lost . (Example: When the left eye is stimulated by light, left pupil does not constrict, because the efferent signals cannot pass from midbrain to the left pupillary sphincter .) </Li> <Li> The contralateral consensual reflex is intact . (Example: When the left eye is stimulated by light, the right pupil constricts, because the afferent limb on the left and the efferent limb on the right are both intact) </Li> <Li> The contralateral direct reflex is intact . (Example: When light is shone into right eye, right pupil constricts . Direct reflex of the right pupil is unaffected, The right afferent limb, right CN II, and the right efferent limb, right CN III, are both intact .) </Li> <Li> The ipsilateral consensual reflex is lost . (Example: When the right eye is stimulated by light, left pupil does not constrict consensually . Right afferent limb is intact, but left efferent limb, left CN III, is damaged .) </Li>

Where is the integration center for the pupillary light reflex located