Direct And Indirect Light Reflex Pathway. The consensual plr pathway direct stimulus of the left eye results in an indirect constriction of the right pupil which is termed the consensual response. The afferent pathway is composed of both the retinal cells that project to the pretectum and their recipient neurons that project bilaterally to the ew figure 1 the efferent pathway is composed of the preganglionic pupilloconstriction fibers of the ew and.
Either no or sluggish response to light both direct and. The pathway of pupillary constriction begins at the edinger westphal nucleus near the occulomotor nerve nucleus. Observe the direct response constriction of the illuminated pupil.
Either no or sluggish response to light both direct and.
A greater intensity of light causes the pupil to constrict miosis myosis. Direct and consensual pupillary light reflexes test for appropriate neurological pathway connections and functioning of both cranial nerve ii and iii. The afferent pathway is composed of both the retinal cells that project to the pretectum and their recipient neurons that project bilaterally to the ew figure 1 the efferent pathway is composed of the preganglionic pupilloconstriction fibers of the ew and. The plr has traditionally been divided into two separate pathways based on the clinical manifestations of the defects in this reflex.
