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 July 29, 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 July 29, 2014).

Share This




More Health & Medicine News

Tuesday, July 29, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Deadly Ebola Virus Threatens West Africa

Deadly Ebola Virus Threatens West Africa

AP (July 28, 2014) West African nations and international health organizations are working to contain the largest Ebola outbreak in history. It's one of the deadliest diseases known to man, but the CDC says it's unlikely to spread in the U.S. (July 28) Video provided by AP
Powered by NewsLook.com
$15B Deal on Vets' Health Care Reached

$15B Deal on Vets' Health Care Reached

AP (July 28, 2014) A bipartisan deal to improve veterans health care would authorize at least $15 billion in emergency spending to fix a veterans program scandalized by long patient wait times and falsified records. (July 28) Video provided by AP
Powered by NewsLook.com
Two Americans Contract Ebola in Liberia

Two Americans Contract Ebola in Liberia

Reuters - US Online Video (July 28, 2014) Two American aid workers in Liberia test positive for Ebola while working to combat the deadliest outbreak of the virus ever. Linda So reports. Video provided by Reuters
Powered by NewsLook.com
Traditional African Dishes Teach Healthy Eating

Traditional African Dishes Teach Healthy Eating

AP (July 28, 2014) Classes are being offered nationwide to encourage African Americans to learn about cooking fresh foods based on traditional African cuisine. The program is trying to combat obesity, heart disease and other ailments often linked to diet. (July 28) Video provided by AP
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:
from the past week

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