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  • Title: Circadian rhythm: population of interacting neurons.
    Author: Jacklet JW, Geronimo J.
    Journal: Science; 1971 Oct 15; 174(4006):299-302. PubMed ID: 5119101.
    Abstract:
    The circadian rhythm in the requency of compound action potentials recorded from the isolated eye of Aplysia is a consequence of interactions among the cells of the retinal population. As the population number is reduced to a critical 20 percent, progressively shorter circadian periods and ranges are expressed. Below the critical number, the population oscillates at ultradian frequencies.
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