Suprachiasmatic nuclear lesions do not abolish food-shifted circadian adrenal and temperature rhythmicity

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Science  22 Jul 1977:
Vol. 197, Issue 4301, pp. 398-399
DOI: 10.1126/science.877566


Daytime restriction of food and water availability in nocturnal animals phase shifts the circadian periodicity of plasma corticosteroid concentrations and body temperature. These shifted rhythms persist in animals with lesions of the suprachiasmatic nuclei who are arrhythmic under normal conditions. These findings suggest the existence of an additional "clock" that may be involved in the generation of the rhythm.