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      A circadian rhythm in neural activity can be recorded from the central nervous system of the cockroach.

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          Abstract

          Evidence presented in this paper indicates that a robust circadian rhythm in the frequency of neural activity can be recorded from the central nervous system of intact cockroaches, Leucophaea maderae. This rhythmicity was abolished by optic lobe removal. Spontaneous neural activity was then used as an assay to demonstrate that the optic lobe is able to generate circadian oscillations in vitro. These results provide direct evidence that the cockroach optic lobe is a self-sustained circadian oscillator capable of generating daily rhythms in the absence of neural or hormonal communications with the rest of the organism.

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          Author and article information

          Journal
          J. Comp. Physiol. A
          Journal of comparative physiology. A, Sensory, neural, and behavioral physiology
          Mar 1990
          : 166
          : 5
          Affiliations
          [1 ] Department of Biology, Vanderbilt University, Nashville, Tennessee 37235.
          2341989

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