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:3/23/2017)... (PRWEB) , ... March 23, 2017 , ... “Wounded Woman ... “Wounded Woman Be Ye Healed-Passing On A Legacy” is the creation of published author, ... founder of Comfortbearers grief ministry. She has been happily married to her husband, ...
(Date:3/23/2017)... ... March 23, 2017 , ... “The Trainer”: an electrifying and ... Scotty, a fiction writer with an active imagination and an enthusiasm for action and ... the tale of Wild Bill Hart, who sat looking at the thirty-three notches that ...
(Date:3/22/2017)... ... March 22, 2017 , ... Cosmetic Town, an ... issue of its companion print magazine. The new magazine, scheduled for release in ... information provided by board-certified doctors from across the country. , According to the ...
(Date:3/22/2017)... Jacksonville, FL (PRWEB) , ... March 22, 2017 ... ... (ASPC) convened experts to create a PCSK9 inhibitor prior authorization (PA) form for ... high cholesterol. It is one of the helpful tools published as part of ...
(Date:3/22/2017)... ... 22, 2017 , ... In recognition of Colon Cancer Awareness ... on cancer patients, cancer centers and advocacy groups, and MJH Studios™, a leading ... “No Ifs, Ands, or Butts,” that focuses on Colorectal Cancer detection, prevention and ...
Breaking Medicine News(10 mins):
(Date:3/23/2017)... -- Merrimack Pharmaceuticals, Inc. (NASDAQ: MACK ) today ... Phase 1 study of MM-310 in solid tumors. MM-310 ... taxane and targets the EphA2 receptor, a protein which ... tumor types, including prostate, ovarian, bladder, gastric, pancreatic and ... is an important step in evaluating MM-310,s safety and ...
(Date:3/23/2017)... NORTH CHICAGO, Ill. , March 23, 2017 /PRNewswire/ ... actress, dancer and Emmy Award-winning choreographer Julianne Hough ... a campaign called "Get in the Know about ME ... AbbVie, is dedicated to inspiring women to learn about ... in 10 women, 1 and to address their ...
(Date:3/23/2017)... 23, 2017 The global dermatology ... 25.7 billion by 2025, according to a new report by ... at a faster rate due to rising concern amongst people ... types of esthetic procedures used for treating hair - and ... are considered as the highest revenue generators for the market. ...
Breaking Medicine Technology:
Cached News: