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:


(Date:5/26/2017)... ... May 26, 2017 , ... Silver Birch of Hammond, a ... located on more than four acres of land at 5620 Sohl Avenue in Hammond, ... 103,000 square-foot building includes 125 studio and one-bedroom apartments. Each of the private apartments ...
(Date:5/26/2017)... CA (PRWEB) , ... May 26, 2017 , ... Dr. ... is proud to announce a new, informational blog post on insurance options. If a ... checking insurance plans may help save time and money. Visiting an in-network provider for ...
(Date:5/26/2017)... ... ... “THE FLINTHILLS FAMILY-Our Journey to the Cross”: the personal journey of Bob Massey and his ... of published authors, Bob and Margaret Massey. Bob Massey is small in stature but ... leather tough." His love for others is apparent in all of his life decisions. ...
(Date:5/26/2017)... ... 26, 2017 , ... “Just What Happened in the Garden of Eden”: retells the stories of ... is the creation of published author, Penelope Colt, mother, trader, horse farmer, artist and a ... when she was three. At six, they moved to Dayton, Ohio, where Penny graduated ...
(Date:5/26/2017)... (PRWEB) , ... May 26, 2017 , ... Water damage ... Lee, New Jersey School District had left education officials with a number of critical ... replacement of the flooring had to be accomplished with little or no disruption to ...
Breaking Medicine News(10 mins):
(Date:5/23/2017)... PLEASANTON, Calif. , May 23, 2017 /PRNewswire/ ... world,s most innovative medical devices for pressure ulcer ... at the American Association of Critical Care Nurses, ... Houston May 22-25. The Leaf Patient ... designed specifically for the hospital environment.  The system ...
(Date:5/15/2017)... May 15, 2017  Amy Baxter MD, chief executive ... in noninvasive pain relief, was awarded a 2017 Top ... Baxter was recognized at the MM&M Top 40 Healthcare ... City on May 10, 2017. The dinner ... industry go "beyond the pill."  "Innovation goes ...
(Date:5/10/2017)... 10, 2017 Global Health Intelligence (GHI), ... America , published its 2017 ranking of the ... on extensive data analysis from GHI,s hospitals database for ... for the region. The GHI database covers 86% of the ... than 130 data points for each institution in key areas ...
Breaking Medicine Technology:
Cached News: