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:10/22/2014)... Lintelus, Inc., an event software provider, ... Sales, will be speaking on the subject of “Event ... October 28, at the Holiday Inn in New York ... well as a Tech Demo at 12:45pm, to educate ... more engaging event experience. , The Annual Meetings Technology ...
(Date:10/22/2014)... WALTHAM, MA (PRWEB) October 22, 2014 ... developing new solutions for the treatment of bacterial infections, ... J. Sinskey has joined its board of directors. ... Microbiology and Engineering Systems at The Massachusetts Institute of ... the MIT faculty since 1968. Dr. Sinskey also holds ...
(Date:10/22/2014)... HealthDay Reporter , TUESDAY, Oct. ... fertilization (IVF) are only about half as likely as white ... new research indicates, and the racial disparity persists even when ... percent of white patients became pregnant after IVF, compared to ... 4,000 IVF cycles over two years to tease out the ...
(Date:10/22/2014)... By Tara Haelle ... -- Binge drinking among young adult men may lead to ... binge drinking didn,t cause a similar rise in blood pressure ... study. In fact, when young adult women drank lightly or ... half, the study found. "This finding parallels studies in ...
(Date:10/22/2014)... Measures taken by Firestone officials at the company,s ... the spread of the disease there and could prove ... Co. provides health services to about 80,000 employees, retirees, ... Between Aug. 1 and Sept. 23, there were ... people. That incidence rate of 0.09 percent was much ...
Breaking Medicine News(10 mins):Health News:Jay Cormier, Sr. Vice President of Sales for Lintelus, Speaks about Event Technology Integration at Meetings Technology Expo in NYC 2Health News:Akeso Biomedical Appoints Dr. Anthony J. Sinskey to Board of Directors 2Health News:Black Women Fare Worse With Fertility Treatments, Study Says 2Health News:Black Women Fare Worse With Fertility Treatments, Study Says 3Health News:Binge Drinking May Boost Blood Pressure in Young Men 2Health News:Binge Drinking May Boost Blood Pressure in Young Men 3Health News:Binge Drinking May Boost Blood Pressure in Young Men 4Health News:Tire Company Sets Standard for Ebola Care in Liberia: CDC 2
(Date:10/22/2014)... Provectus Biopharmaceuticals, Inc. (NYSEMKT: PVCT) specializes in ... drug for cancer, is designed for injection into solid ... oncology focus is on melanoma, breast cancer and cancers ... of PV-10 as a therapy for metastatic melanoma, and ... and psoriasis. This summer, the Company ...
(Date:10/20/2014)... Oct. 20, 2014  PneumRx, Inc. ( www.pneumrx.com ), ... announced completion of enrollment in their RENEW Study, nearly ... is the FDA-approved IDE pivotal trial for the PneumRx ... It was anticipated that the study, which began ... take until the end of 2014 to enroll 315 ...
(Date:10/20/2014)... , Oct. 20, 2014 Valeritas, Inc., a ... for patients with Type 2 diabetes, announced today that ... Excellence Award. The award was presented October 16 th ... Columbus, Ohio . The ... across a variety of metrics specifically targeted at the ...
Breaking Medicine Technology:Provectus Biopharmaceuticals Looks at the Asian Markets: Analyst Coverage by Small Cap Traders 2PneumRx Completes RENEW Pivotal Trial Enrollment 2PneumRx Completes RENEW Pivotal Trial Enrollment 3Valeritas Receives 2014 Cardinal Health Supply Chain Excellence Award 2Valeritas Receives 2014 Cardinal Health Supply Chain Excellence Award 3
Cached News: