ArticleThe European journal of neuroscience2008
Day-length encoding through tonic photic effects in the retinorecipient SCN region.
Article in The European journal of neuroscience, 2008. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 19 papers.
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Who cites it
19 citing papers in PubMed, 30 citations in OpenAlex.
- Suprachiasmatic nucleus-wide estimation of oscillatory temporal dynamics.PLoS computational biology · 2025Article
- On the origin and evolution of the dual oscillator model underlying the photoperiodic clockwork in the suprachiasmatic nucleus.Journal of comparative physiology. A, Neuroethology, sensory, neural, and behavioral physiology · 2024Review
- Article
- Circadian and photic modulation of daily rhythms in diurnal mammals.The European journal of neuroscience · 2020Review
- Photoperiod-Induced Neuroplasticity in the Circadian System.Neural plasticity · 2018Review
- Commentary: miR-132/212 Modulates Seasonal Adaptation and Dendritic Morphology of the Central Circadian Clock.Journal of neurology & neuromedicine · 2018Article
- miR-132/212 Modulates Seasonal Adaptation and Dendritic Morphology of the Central Circadian Clock.Cell reports · 2017Article
- Unilaterally blocking the muscarinic receptors in the suprachiasmatic nucleus in proestrus rats prevents pre-ovulatory LH secretion and ovulation.Reproductive biology and endocrinology : RB&E · 2016Article
- In synch but not in step: Circadian clock circuits regulating plasticity in daily rhythms.Neuroscience · 2016Review
- Article
- Skin, reactive oxygen species, and circadian clocks.Antioxidants & redox signaling · 2014Review
- Article
- Orexinergic signaling mediates light-induced neuronal activation in the dorsal raphe nucleus.Neuroscience · 2012Article
- Twelve-hour days in the brain and behavior of split hamsters.The European journal of neuroscience · 2012Article
- Intrinsic regulation of spatiotemporal organization within the suprachiasmatic nucleus.PloS one · 2011Article
- Reorganization of suprachiasmatic nucleus networks under 24-h LDLD conditions.Journal of biological rhythms · 2010Article
- Expression of clock genes in the suprachiasmatic nucleus: effect of environmental lighting conditions.Reviews in endocrine & metabolic disorders · 2009Review
- Basis of robustness and resilience in the suprachiasmatic nucleus: individual neurons form nodes in circuits that cycle daily.Journal of biological rhythms · 2009Review
- Article
Corrections and comments
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Authors and funding
2 authors at 2 institutions in 1 country.
Funding
Abstract
The circadian clock in the suprachiasmatic nucleus (SCN) plays a critical role in seasonal processes by sensing ambient photoperiod. To explore how it measures day-length, we assessed the state of SCN oscillators using markers for neuronal activity (c-FOS) and the clock protein (PER1) in Syrian hamsters housed in long (LD, 16 : 8 h light : dark) vs. short days (SD, 8 : 16 h light : dark). During SD, there was no detectable phase dispersion across the rostrocaudal extent of the nucleus. In contrast, during LD, rhythms in the caudal SCN phase led those in the mid- and rostral SCN by 4-8 h and 8-12 h, respectively. Importantly, some neurons in the retinorecipient core SCN were unique in that they were FOS-positive during the dark phase in LD, but not SD. Transfer of LD animals to constant darkness or skeleton photoperiod revealed that dark-phase FOS expression depends on tonic light exposure rather than on intrinsic clock properties. By transferring animals from SD to LD, we next discovered that there are two separate populations of SCN cells, one responding to acute and the other to tonic light exposure. The results suggest that the seasonal encoding of day-length by the SCN entails reorganization of its constituent oscillators by a subgroup of neurons in the SCN core that respond to tonic photic cues.
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Registered trials
Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.