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One millisecond of light suffices to suppress nighttime pineal melatonin synthesis in rats
L Vollrath1, A Seidel, A Huesgen
1Institute of Anatomy, Johannes Gutenberg University, Mainz, F.R.G.
Neuroscience Letters
|April 10, 1989
Abstract:
The effect of a single high-intensity light pulse with a duration of 1 ms on nighttime pineal activity of male Sprague-Dawley rats was investigated. 10 minutes after light exposure pineal N-actyltransferase activity and melatonin content were significantly reduced. These results show that the rat pineal is capable of responding to very short light flashes of high intensity.