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Tag: "daylight" at medical news

Researchers Find Estrogen Governs Genes That Affect Aggression

...ve behaviour in accordance with the length of the daylight they face. The researchers found that a class of...hemical decreases aggression among male mice, when daylight increases in the summer. Published online this week in the Proceedings of the National Academy of ...

Life Functions Governed by Circadian Rhythms-new Research

...ted" system and gene expression can be impacted by daylight and darkness -- or a lack of both. For example, while gene expression oscillates in mice exposed to a constant state of dim light or darkness, the groups of genes that typically oscillate together -- such as genes responsible for the function of an o...

Research on Fruit Bats

...in two types of photoreceptor cells, the cones for daylight vision and colour vision, and the more sensitive r...only rods. Hence, fruit bats are also equipped for daylight vision. The researchers conclude that cone photoreceptors might be useful for spotting predators and...

Time Dependent Medical Devices in Danger –hospitals and Individuals Warne

This year, North America’s daylight savings time starts 3 weeks earlier than usual. In...y affected by the earlier start (and later end) of daylight savings time could produce patient treatment that is incorrectly prescribed or administered at the w...

Sex Ends as Seasons Shift and Kisspeptin Levels Plummet

...' libido and reproduction as winter approaches and daylight hours wane. "Ours isn't the first study to link the peptide to reproduction, but it is the first to connect kisspeptin to how animals interpret seasonal cues, including day length," said IUB biologist Gregory Demas. "Kisspeptin likely plays an int...

Model of Internal Clocks Reveals How Jet Lag Disrupts the System

... the hypothalamus. The SCN receives information on daylight sent from the eyes’ optic nerve and can be reset by environmental cues such as light. Recent research suggests that every cell in the body actually has its own clock—liver cells prepare for digestion at particular times of day; patterns of hormone ...

Help Near At Hand For Elderly With Disturbed Sleep

... are given. "A daytime walk with correctly timed daylight exposure is useful for insomnia," she says. "Appropriate temperature control, adequate ventilation, and dark sleep environment may also lead to dramatic improvement in sleep quality." Among the other lifestyle medications she suggests: * Incr...

Light Cafe to help beat winter blues for SAD

.... It is believed to be caused by the shortening of daylight hours and lack of sunlight in winter. Up to one in eight people in the UK are thought to experience a milder form of the condition, known as sub-syndromal SAD. Exposure to bright light for between 1 to 4 hours daily is an effective treatment for S...

Reindeer Provide Valuable Insights Into Sleep Disorders

...animals face difficulty in coping up with constant daylight during the summer and darkness during winter. Ot...n in these sub-species that were exposed to normal daylight and darkness for a period of just 18 months. This observation has for the first time suggested a p...

Fertility Treatment Offered During Summer Has Better Chances For Success

...rtility treatment, over a four-year period. Longer daylight hours are believed to improve the chances of succe...needed in order to identify the positive effect of daylight on reproduction....

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