Back to Home PageWelcome Guest! Register | Login | Home | Contact Us | Site Map | Advertise | FAQ | Search
Canadian Desi
    News


        
   Articles   NewsPapers   Top   India   Pakistan   Canada   USA   Diaspora   Sports   Politics   Law & Order   Business   Entertainment   Technology   More

'Seals require only half of their brain to fall asleep'








Toronto, Feb 20 (IANS) Believe it or not, seals require only half of their brain to fall asleep, thanks to the presence of specific chemicals, suggests a biological study.

Scientists from Universities of California, Los Angeles and Toronto (Canada), led a team that identified the chemical cues allowing the seal brain halves to remain awake and asleep.

The findings may explain the biological mechanisms that enable the brain to remain alert during waking hours and go off-line during sleep, the Journal of Neuroscience reports.

"Seals do something biologically amazing, they sleep with half their brain at a time. The left side of their brain can sleep while the right side stays awake. Seals sleep this way while they're in water, but they sleep like humans while on land," says John Peever, professor at Toronto.

"Our research may explain how this unique biological phenomenon happens" adds Peever, according to a Toronto statement.

Jennifer Lapierre, doctoral student at Toronto and study co-author, made this discovery by measuring how different chemicals change in the sleeping and waking sides of the brain.

She found that acetylcholine - an important brain chemical - was at low levels on the sleeping side of the brain but at high levels on the waking side. This finding suggests that acetylcholine may drive brain alertness on the side that is awake.

But, the study also showed that another important brain chemical - serotonin - was present at the equal levels on both sides of the brain whether the seals were awake or asleep. This was a surprising finding because scientist long thought that serotonin was a chemical that causes brain arousal.

"It could help solve the mystery of how and why we sleep," says study's senior author Jerome Siegel from California's Brain Research Institute.

 
Indo Asian News Service

<< Previous Story <<
Strong, flexible artificial muscles designed

 
Your Comments on this News:

Latest News

Russians to get awards over meteorite response
 
Russian party wants fines on use of foreign words
 
Russia, NATO to hold anti-piracy exercise
 
Terrorists strike Dilsukhnagar for second time in 10 years
 
Terror returns to Hyderabad, 12 die in twin blasts
 
Hockey World League: Indian men escape with 3-2 win over Ireland
 
Gang-rape victim's family to get flat
 
IOC vote a wake-up call for hockey: FIH president
 
Chennai is very lucky for me: Bappi Lahiri
 
Economic census begins in Delhi
 

News Categories

India
 
North America
 
South Asia
 
Gulf-Middle East
 
South East Asia
 
South West Asia
 
Asia
 
Europe
 
Australia
 
Caribbeans
 
Africa
 
South America
 
United Nations
 
National
 
Business
 
Sports
 
Technology
 
Culture
 
Diaspora
 
Education
 
Entertainment
 
Indo-Pak
 
Incidents
 
Law
 
Religion
 
Security
 
Health
 
Lifestyle
 
Media
 
Society
 
Nature
 
Movie Review
 
Movie Snippets
 
Interview
 
Commentary
 
Articles
 
Features
 


 
Web
CanadianDesi
Please Contribute!
Write an Article
Send Community News
Create Photo and Video Albums
Submit Good Pictures
List Useful Websites
Post Jobs
Submit Events
List for FREE!
Businesses
Classifieds
Social Organizations
Religious Places
Employment Agencies
Email Page
Your Email
Friend\'s Email

Advertise Contact Us Privacy Policy and Terms of Usage FAQ
Canadian Desi
© 2001 Marg eSolutions


Site designed, developed and maintained by Marg eSolutions Inc.