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:9/1/2015)... (PRWEB) , ... September 01, 2015 , ... Routines… every ... – routines can help make things easier for parents, caregivers and children too. Here ... routines, transitions both big and small become more fluid. When a routine is implemented ...
(Date:9/1/2015)... ... September 01, 2015 , ... September is Baby Safety Month, and Lightning ... stickers to keep little ones' safety top of mind at all times. , Sponsored ... focus. According to the JPMA's Baby Safety Zone website, this year's theme is A ...
(Date:9/1/2015)... ... September 01, 2015 , ... ... of professional hair salons. This highly anticipated partnership between Curly Hair Solutions™ and ... Styling Collection. Founder Jonathan Torch and the Curly Hair Solutions™ team could not ...
(Date:8/31/2015)... Orange, NJ (PRWEB) , ... September 01, 2015 ... ... the spine to eliminate chronic back pain – once required a long, arduous ... a shorter hospital stay, less pain, less blood loss and minimal muscle damage. ...
(Date:8/31/2015)... ... August 31, 2015 , ... Cosmetic ... the resources they need to have a successful cosmetic procedure; from publishing encyclopedic ... Cosmetic Town Journal is always ready to help. , It is clear that ...
Breaking Medicine News(10 mins):Health News:Back into the Swing of Things: How Family Routines Benefit Children 2Health News:Lightning Labels Can Help Make A Difference This Baby Safety Month 2Health News:Lightning Labels Can Help Make A Difference This Baby Safety Month 3Health News:Curly Hair Solutions™ Partners With Trade Secrets 2Health News:Minimally Invasive Spinal Fusions Squash Back Pain without Arduous Recovery 2Health News:Minimally Invasive Spinal Fusions Squash Back Pain without Arduous Recovery 3Health News:Minimally Invasive Spinal Fusions Squash Back Pain without Arduous Recovery 4Health News:Cosmetic Town: A One Stop Plastic Surgery Community 2
(Date:8/31/2015)... Aug. 31, 2015  DICOM Grid,  the #1 ... it was recognized as a semifinalist for a ... The awards are sponsored by Auntminnie.com, a ... in the medical imaging industry.  Since 1999, the ... to acknowledge the contributions of their peers. Nominations ...
(Date:8/31/2015)... JERUSALEM, Israel, Aug. 31, 2015  Chiasma, Inc. ... company developing octreotide capsules for the orphan condition ... quarter ended June 30, 2015 and provided a ... have been a transformative time for Chiasma, as ... recently announced that our first New Drug Application ...
(Date:8/31/2015)... Thousands of people will peacefully demonstrate their ... addiction epidemic at dozens of rallies across the country ... the United States has experienced skyrocketing ... and heroin, yet the President has never once spoken ... letter to President Obama , rally organizers compared his ...
Breaking Medicine Technology:DG Suite Nabs "Minnies" Nomination for "Best New Radiology Software" 2Chiasma Reports Second Quarter 2015 Financial Results and Recent Business Highlights 2Chiasma Reports Second Quarter 2015 Financial Results and Recent Business Highlights 3Chiasma Reports Second Quarter 2015 Financial Results and Recent Business Highlights 4Chiasma Reports Second Quarter 2015 Financial Results and Recent Business Highlights 5Chiasma Reports Second Quarter 2015 Financial Results and Recent Business Highlights 6Chiasma Reports Second Quarter 2015 Financial Results and Recent Business Highlights 7Chiasma Reports Second Quarter 2015 Financial Results and Recent Business Highlights 8Chiasma Reports Second Quarter 2015 Financial Results and Recent Business Highlights 9Obama Administration's Neglect of Opioid Crisis Prompts Rallies in Many States 2
Cached News: