ArticleJournal of comparative physiology. A, Sensory, neural, and behavioral physiology1996
Shortening of the photoperiod affects sleep distribution, EEG and cortical temperature in the Djungarian hamster.
Article in Journal of comparative physiology. A, Sensory, neural, and behavioral physiology, 1996. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 13 papers.
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Who cites it
13 citing papers in PubMed, 49 citations in OpenAlex.
- Wintering Barnacle Geese Exhibit an Increased Behavioural Drive for Sleep After Sleep Deprivation Without a Clear EEG-Based Sleep Rebound.Journal of sleep research · 2026Article
- The effects of diazepam on sleep depend on the photoperiod.Acta pharmacologica Sinica · 2025Article
- Seasonal variation in sleep time: jackdaws sleep when it is dark, but do they really need it?Journal of comparative physiology. B, Biochemical, systemic, and environmental physiology · 2024Article
- Brain Temperature Alters Contributions of Excitatory and Inhibitory Inputs to Evoked Field Potentials in the Rat Frontal Cortex.Frontiers in cellular neuroscience · 2020Article
- Deletion of the Snord116/SNORD116 Alters Sleep in Mice and Patients with Prader-Willi Syndrome.Sleep · 2016Article
- Altered Electroencephalographic Activity Associated with Changes in the Sleep-Wakefulness Cycle of C57BL/6J Mice in Response to a Photoperiod Shortening.Frontiers in behavioral neuroscience · 2016Article
- Sex differences in Siberian hamster ultradian locomotor rhythms.Physiology & behavior · 2013Article
- Article
- Pineal and gonadal influences on ultradian locomotor rhythms of male Siberian hamsters.Hormones and behavior · 2013Article
- Article
- Seasonal aspects of sleep in the Djungarian hamster.BMC neuroscience · 2003Article
- Sleep in the platypus.Neuroscience · 1999Article
- Sleep and sleep regulation in normal and prion protein-deficient mice.The Journal of neuroscience : the official journal of the Society for Neuroscience · 1997Article
Corrections and comments
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Authors and funding
2 authors at 1 institution in 1 country.
Funding
No grant is acknowledged in the PubMed record.
Abstract
To asses the influence of photoperiod on sleep regulation EEG, EMG, and cortical temperature were continuously recorded for two baseline days and after 4 h sleep deprivation in Djungarian hamsters (Phodopus sungorus) adapted to a short photoperiod (light dark 8:16). Comparison to previous data collected in a long photoperiod (light:dark 16:8) showed several major effects of photoperiod: 1. A prominent change in the 24-h distribution, duration and number of vigilance state episodes, whereas the total amount of sleep and waking was unchanged; 2. Cortical temperature was 0.7 degree C lower in the short photoperiod; 3. There was a significant negative correlation between cortical temperature and the frequency of REM sleep episodes; and 4. Absolute EEG power density showed a marked reduction in the short photoperiod. After sleep deprivation EEG slow-wave activity (mean power density 0.75-4.0 Hz) in NREM sleep showed a remarkably similar increase in both photoperiods demonstrating the robustness of the homeostatic regulation of sleep. Cortical temperature remained above baseline values after sleep deprivation in the short photoperiod whereas a negative rebound was present in the long photoperiod. Our results support the hypothesis that cortical temperature has a strong influence on REM sleep propensity and indicate the possibility of an optimum cortical temperature for recovery sleep after sleep deprivation. The lower EEG power density in the short photoperiod may contribute to energy conservation.
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