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  • Title: Midbrain single units correlating with pupil response to light.
    Author: Smith JD, Ichinose LY, Masek GA, Watanabe T, Stark L.
    Journal: Science; 1968 Dec 13; 162(3859):1302-3. PubMed ID: 5699209.
    Abstract:
    The consensual response of the pupil in the cat was driven by means of a light flux impinging on the contralateral retina. Spike trains recorded extracellularly from single units in the midbrain show correlation with the concurrently recorded pupil area. The temporal dynamics found confirm two earlier studies of sinigle-unit responses and quantitative nerve stimulation. Both of these indicate that most of the 200-millisecond transport delay resides in the neuromuscular apparatus. Neurons whose activity correlated either with constriction with dilatation phases of Change in the pupil area were observed.
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