Circadian clock 2006-12-22 health, the brain Brain > A biological device in the Brain which allows one to keep track of day and night and sleep patterns. See also: Interval timer The Stopwatch Of Brain; The Interval Timer Circadian Rhythms in Cultured Mammalian Retina, by Gianluca Tosini and Michael Menaker (archived) A 24-Hour Circadian Clock Is Found in the Mammalian Retina Comment
