HOME >> MEDICINE >> NEWS
Scents will not rouse us from slumber, says new Brown University study

PROVIDENCE, R.I. -- While sound can disrupt sleep, scents cannot. People cannot rely on their sense of smell to awaken them to the danger of fire, according to a new Brown University study.

Study participants easily detected odors when awake and in the early transition into sleep (Stage One sleep) but, once asleep, did not. The findings indicate a significant alteration of perceptual processing as a function of sleep.

"Human olfaction appears insufficiently sensitive and reliable to act as a sentinel system," said Rachel S. Herz, visiting assistant professor of psychology and an author of a study titled "Minimal Olfactory Perception During Sleep: Why Odor Alarms Will Not Work for Humans," published in a recent issue of the journal Sleep.

Researchers studied the effects of two scents the pleasurable peppermint and offensive pyridine on six participants in their early 20s.

Over two nights, participants wore an elastic chinstrap to encourage nose breathing. Researchers presented odors through a tube attached to an air-dilution device. The odors were tested during moderately deep Stage Two sleep, deep Stage Four sleep and REM (rapid eye movement) sleep.

No one responded to peppermint during sleep. Responses to the intense and noxious pyridine were infrequent and did not wake any participants in the deepest stage of sleep. Pyridine is a component of coal tar and used as a herbicide for firewood, and thus a likely byproduct of many real fires, according to the authors.

However, sound woke the participants regardless of the sleep stage. A moderately loud auditory tone produced arousal from sleep virtually every time the scents did not.

Most odors stimulate people's trigeminal nerve to some degree, which is relevant to detection of the scent. Both odors used in the study were of comparable trigeminal strength even though one was pleasant and the other aversive at high concentrations.

"As the saying goes,"
'"/>

Contact: Kristen Cole
Kristen_Cole@brown.edu
401-863-7508
Brown University
17-May-2004


Page: 1 2

Related medicine news :

1. Scents and emotions linked by learning, Brown study shows
2. Brown and NIH create joint neuroscience graduate program
3. DHHS designates Brown as national site for Cochrane Collaboration
4. Brown researchers find new photoreceptor and visual system in the eye
5. Indiana University researchers closer to helping hearing-impaired using stem cells
6. Boston University team finds link between high cholesterol and better cognitive performance
7. University seeks recruits for arthritis study
8. University of Manchester awarded 826k for brain science and mental health research
9. $4 million grant boosts University of Michigan campaign for a new childrens hospital
10. Lead in the environment causes violent crime, reports University of Pittsburgh researcher at AAAS
11. Next generation body scanner launched by the University of Manchester

Post Your Comments:
*Name:
*Comment:
*Email:
TAG: Scents will not rouse from slumber says new Brown University study

(Date:12/15/2014)... SIMpalm, a leading mobile app development company , ... client, which allows users to keep track of wines ... the right wine. At the center of WineMatch ... and wine information. All this information is assembled to ... that are close counterparts to one another are called ...
(Date:12/15/2014)... Reinberg HealthDay Reporter FRIDAY, ... should reassure the millions of American women who have migraine: ... "There is no association between migraine and breast cancer ... medicine at Harvard Medical School. "There is no positive association, ... no protective effect either." About 18 percent of American ...
(Date:12/15/2014)... December 15, 2014 Kathy McAfee, America's ... Women World Awards in the category of Best Blog ... award for her weekly career blog Networking Ahead ... to help professionals elevate their talent and influence through ... named after her book Networking Ahead for Business, has ...
(Date:12/15/2014)... December 15, 2014 At the leading, ... AutismOne and Focus Autism will ... with research on the effects of toxins to children’s ... intervention information. , Luminaries such as Dr. Lucija ... abroad with esteemed, credentialed colleagues of the United States ...
(Date:12/15/2014)... 2014 For the second year in a ... 30 Coffees of 2014.” Bird Rock Coffee Roasters’ Sumatra Ulos ... Ethiopia at number 10. This is the first year that ... selection is ranked on quality, value, and other aspects, including ... out of 100, and at $17.99 for 12-ounces, was also ...
Breaking Medicine News(10 mins):Health News:Use WinMatch Connect App to Keep Track of Wines You Like 2Health News: No Link Between Migraine, Breast Cancer Risk, Study Says 2Health News:Kathy McAfee, America’s Marketing Motivator, Wins Best Blog from Women World Awards 2Health News:AutismOne and Focus Autism Collaborate on Scientific Conference; International Group of Researchers to Present in Chicago, May 2015 2Health News:AutismOne and Focus Autism Collaborate on Scientific Conference; International Group of Researchers to Present in Chicago, May 2015 3Health News:Bird Rock Coffee Roasters Ranks Second and Tenth in Coffee Review’s ‘Top 30 Coffees of 2014’ 2
(Date:12/15/2014)... 2014  Colorado and Washington State ... of cannabis. Oregon , Alaska ... prohibition during the November 2014 elections. Photo ... The benefits of legalizing cannabis are ... like the increased tax revenue for state and local governments, ...
(Date:12/15/2014)... 2014  Stephen Squires, CEO and founder of leading ... (OTCQB:QTMM), will be speaking at the launch event ... December 16th, 2014. The RCQM launch continues Rice University,s ... top faculty and students and by inviting the world,s ... "We have a long association with Rice ...
(Date:12/15/2014)... and BOSTON , December ... leading GPCR structure-guided drug discovery and development company, is ... in the United States relating ... these patents in the US significantly strengthens the global ... major pharmaceutical markets. The suite of patents ...
Breaking Medicine Technology:CannaInsider.com Estimates 200,000 New Jobs in the Cannabis Industry by 2015 2Quantum Materials CEO Stephen Squires to Speak at Rice Center for Quantum Materials Launch 2Quantum Materials CEO Stephen Squires to Speak at Rice Center for Quantum Materials Launch 3Heptares Extends Global Patent Protection for GPCR-Focused Drug Discovery Platform With Grant of Core Patents in the United States 2
Cached News: