Summary
Following the intraocular injection of 6-hydroxydopamine, which can destroy the retinal dopaminergic neurons, female rats showed a normal estrous cycle in LD 12∶12 but not a persistent estrus in continuous light.
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Shimizu, K., Hokano, M. Intraocular 6-hydroxydopamine prevents the persistent estrus induced by continuous light. Experientia 41, 125–127 (1985). https://doi.org/10.1007/BF02005910
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DOI: https://doi.org/10.1007/BF02005910