The simple idea
Light entering one eye travels through the retina and optic nerve to the pretectal area, then reaches both Edinger-Westphal nuclei. That is why one light normally causes direct and consensual constriction.
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Part 5 · The Nervous System II — Spine, Movement, Memory and Stroke
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Light entering one eye travels through the retina and optic nerve to the pretectal area, then reaches both Edinger-Westphal nuclei. That is why one light normally causes direct and consensual constriction.
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