Midbrain reticular stimulation and brightness detection.
D000221:Adaptation, Ocular; D000818:Animals; D004558:Electric Stimulation; D000882:Haplorhini; D008027:Light; D008253:Macaca mulatta; D008297:Male; D008636:Mesencephalon / Q000502:physiology*; D010783:Photometry; D012154:Reticular Formation / Q000502:physiology; D014796:Visual Perception / Q000502:physiology*