doi: 10.1007/BF01965576.
Functional absence of brain photoreceptors mediating entrainment of circadian rhythms in the adult rat
- PMID: 7202675
- DOI: 10.1007/BF01965576
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Functional absence of brain photoreceptors mediating entrainment of circadian rhythms in the adult rat
Experientia.
.
Abstract
The photic energy penetrating into the brain was increased in adult rats sustaining craniotomies sealed with transparent plastic. After blinding, these animals failed to entrain their circadian food intake rhythm to light-dark cycles. Short pulses of light did not phase-shift the freerunning rhythm. We conclude that adult rats lack brain photoreceptors mediating entrainment of circadian rhythms.
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