Many of us tend to feel sad or not like our usual self as autumn and winter approach. But for some, these feelings persist until spring arrives.
Oct 25, 2022
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Neurons in the brain's master clock that adjust their activity in response to light have a key role in the resetting of an animal's daily cycle, finds a study of male and female mice published in JNeurosci. These cells may ...
Aug 6, 2018
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Biological clocks throughout the body trigger the release of the hormone melatonin during sleep, induce the secretion of digestive enzymes at lunchtime or keep us awake at the busiest moments of the day. A "master clock" ...
Oct 2, 2017
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For people who don't get sleepy until 2 a.m., the buzz of an alarm clock can feel mighty oppressive.
Sep 18, 2017
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Ludwig II of Bavaria is a particularly striking example of how differently people's internal clocks can tick. Historical sources tell us that the monarch usually carried out his government business at night and slept during ...
Oct 14, 2016
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Research from University of California, Irvine scientists and their colleagues offers new insights into why many animals sleep at night and are active during the day, while others do the reverse.
Aug 22, 2016
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Researchers at Johns Hopkins and the University of Washington report new research that sheds light on how the retina sets its own biological rhythm using a novel light-sensitive pigment, called neuropsin, found in nerve cells ...
Sep 29, 2015
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Researchers have gained fresh insights into how 'local' body clocks control waking and sleeping.
Nov 14, 2014
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As we reset our clocks and watches for daylight saving time, it's a good opportunity to think about our body clocks as well. Our bodies naturally operate on 24-hour cycles, called circadian rhythms, that respond to external ...
Nov 4, 2014
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Johns Hopkins researchers report that they have identified a protein essential to the formation of the tiny brain region in mice that coordinates sleep-wake cycles and other so-called circadian rhythms.
Apr 24, 2014
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