Latest Phase response curve Stories

2010-07-27 01:13:55

Field study demonstrates that extended daylight hours influence teens' sleeping patterns In the spring, later sunset and extended daylight exposure delay bedtimes in teenagers, according to researchers at Rensselaer Polytechnic Institute's Lighting Research Center (LRC). "Biologically, this increased exposure to early evening light in the spring delays the onset of nocturnal melatonin, a hormone that indicates to the body when it's nighttime," explains Mariana Figueiro, Ph.D., associate...

2009-06-05 17:40:11

Blue light treatments may improve sleep quality in older adults, U.S. researchers found. Researchers at the Rensselaer Polytechnic Institute in Troy, N.Y., tested whether a device used to deliver blue light directly to the eyes would affect circadian rhythms -- the body's internal clock that regulates when and how much people sleep and other biological cycles. Light and dark patterns are the major synchronizer of circadian rhythms to the 24-hour solar day, study principal investigator...

2009-05-29 13:39:50

Sleep disturbances increase as we age. Some studies report more than half of seniors 65 years of age or older suffer from chronic sleep disturbances. Researchers have long believed that the sleep disturbances common among the elderly often result from a disruption of the body's circadian rhythms "” biological cycles that repeat approximately every 24 hours. In recent years, scientists at Rensselaer Polytechnic Institute's Lighting Research Center and elsewhere have demonstrated that...

2008-06-06 14:43:11

Like a wristwatch that needs to be wound daily for accurate time-telling, the human circadian system "” the biological cycles that repeat approximately every 24 hours "” requires daily light exposure to the eye's retina to remain synchronized with the solar day. In a new study published in the June issue of Neuroscience Letters, researchers have demonstrated that when it comes to the circadian system, not all light exposure is created equal.The findings have profound implications...

2005-11-12 09:46:31

A light box plus melatonin may let travelers arrive refreshed Tired travelers may have a means of reducing or preventing jet lag, researchers report. By using light box therapy and the over-the-counter drug melatonin, people can reset their circadian "body clocks" before a journey, according to a U.S. study in the current issue of the Journal of Clinical Endocrinology and Metabolism. This approach can also be used to help people with delayed sleep phase syndrome (DSPS), a condition caused by...

2005-11-01 20:18:49

A simple, at-home treatment -- a single light box and the over-the-counter drug melatonin -- allows travelers to avoid jet lag by resetting their circadian body clock before crossing several time zones, according to new research being published in The Endocrine Society's Journal of Clinical Endocrinology and Metabolism. This treatment can also help those with delayed sleep phase syndrome (DSPS), a persistent condition that results from a misalignment between a person's internal biological...

Word of the Day
  • The hard inner (usually woody) layer of the pericarp of some fruits (as peaches or plums or cherries or olives) that contains the seed.
This word comes from the Greek 'endon,' in, within, plus the Greek 'kardia,' heart.