Featured Research

from universities, journals, and other organizations

Study Shines Light On Night-time Alertness

Date:
August 29, 2009
Source:
BioMed Central
Summary:
The circadian system is not the only pathway involved in determining alertness at night. New research shows that red light, which does not stimulate the circadian system, is just as effective at increasing night-time alertness as blue light, which does.

The circadian system is not the only pathway involved in determining alertness at night. Research described in the open access journal BMC Neuroscience showed that red light, which does not stimulate the circadian system, is just as effective at increasing night-time alertness as blue light, which does.

Mariana Figueiro worked with a team of researchers from Rensselaer Polytechnic Institute, New York, supported by the Office of Naval Research (ONR), to study the effects of the different lighting conditions. She said, "It is now well accepted that the circadian system is maximally sensitive to short-wavelength (blue) light and is quite insensitive to long-wavelength (red) light. We've shown that a moderate level of red light impacts alertness, an effect that must occur via a pathway other than the circadian system".

Circadian rhythms are roughly 24-hour cycles in various biological processes, such as core body temperature, melatonin synthesis and sleep–wake behavior, that repeat approximately every 24 hours and are synchronized most strongly by the light–dark cycle in the environment. Bright light is known to increase alertness at night, but it has never been completely clear whether this light-induced alertness can arise from neural pathways other than those involved in the circadian system.

According to Figueiro, "There is previous compelling evidence that light-induced stimulation of the circadian system increases alertness at night, but our results suggest that this effect is mediated not only by the circadian system, but also through other mechanisms".


Story Source:

The above story is based on materials provided by BioMed Central. Note: Materials may be edited for content and length.


Journal Reference:

  1. Mariana G Figueiro, Andrew Bierman, Barbara Plitnick and Mark S Rea. Preliminary evidence that both blue and red light can induce alertness at night. BMC Neuroscience, 2009; (in press) [link]

Cite This Page:

BioMed Central. "Study Shines Light On Night-time Alertness." ScienceDaily. ScienceDaily, 29 August 2009. <www.sciencedaily.com/releases/2009/08/090826191845.htm>.
BioMed Central. (2009, August 29). Study Shines Light On Night-time Alertness. ScienceDaily. Retrieved October 1, 2014 from www.sciencedaily.com/releases/2009/08/090826191845.htm
BioMed Central. "Study Shines Light On Night-time Alertness." ScienceDaily. www.sciencedaily.com/releases/2009/08/090826191845.htm (accessed October 1, 2014).

Share This



More Health & Medicine News

Wednesday, October 1, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Some Positive Ebola News: Outbreak 'Contained' In Nigeria

Some Positive Ebola News: Outbreak 'Contained' In Nigeria

Newsy (Sep. 30, 2014) The CDC says a new case of Ebola has not been reported in Nigeria for more than 21 days, leading to hopes the outbreak might be nearing its end. Video provided by Newsy
Powered by NewsLook.com
UN Ebola Mission Head: Immediate Action Is Crucial

UN Ebola Mission Head: Immediate Action Is Crucial

AFP (Sep. 30, 2014) The newly appointed head of the United Nations Mission for Ebola Emergency Response (UNMEER), Anthony Banbury, outlines operations to tackle the virus. Duration: 00:39 Video provided by AFP
Powered by NewsLook.com
CDC Confirms First Case of Ebola in US

CDC Confirms First Case of Ebola in US

AP (Sep. 30, 2014) The CDC has confirmed the first diagnosed case of Ebola in the United States. The patient is being treated at a Dallas hospital after traveling earlier this month from Liberia. (Sept. 30) Video provided by AP
Powered by NewsLook.com
New Breast Cancer Drug Extends Lives In Clinical Trial

New Breast Cancer Drug Extends Lives In Clinical Trial

Newsy (Sep. 30, 2014) In a clinical trial, breast cancer patients lived an average of 15 months longer when they received new drug Perjeta along with Herceptin. Video provided by Newsy
Powered by NewsLook.com

Search ScienceDaily

Number of stories in archives: 140,361

Find with keyword(s):
Enter a keyword or phrase to search ScienceDaily for related topics and research stories.

Save/Print:
Share:

Breaking News:

Strange & Offbeat Stories


Health & Medicine

Mind & Brain

Living & Well

In Other News

... from NewsDaily.com

Science News

Health News

Environment News

Technology News



Save/Print:
Share:

Free Subscriptions


Get the latest science news with ScienceDaily's free email newsletters, updated daily and weekly. Or view hourly updated newsfeeds in your RSS reader:

Get Social & Mobile


Keep up to date with the latest news from ScienceDaily via social networks and mobile apps:

Have Feedback?


Tell us what you think of ScienceDaily -- we welcome both positive and negative comments. Have any problems using the site? Questions?
Mobile: iPhone Android Web
Follow: Facebook Twitter Google+
Subscribe: RSS Feeds Email Newsletters
Latest Headlines Health & Medicine Mind & Brain Space & Time Matter & Energy Computers & Math Plants & Animals Earth & Climate Fossils & Ruins