Navigation Links
'Power napping' in pigeons
Date:3/3/2008

This release is available in German.

In humans, as in all mammals, sleep consists of two phases: deep, dreamless slow-wave-sleep (SWS) alternates with dream phases, called Rapid Eye Movement (REM)-sleep. Although several studies suggest that information is processed and memories are consolidated during sleep, this remains a hotly debated topic in neurobiology. Comparative studies in birds may help to clarify the function of sleep by revealing overriding principles that would otherwise remain obscure if we only studied mammals. This is because birds are the only taxonomic group other than mammals to show both SWS and REM sleep. Interestingly, the independent evolution of similar sleep states in birds and mammals might be related to the fact that each group also independently evolved large brains capable of performing complex cognitive processes. In their actual study, researchers from the Max-Planck Institute of Ornithology in Seewiesen, Germany showed for the first time that birds compensate for sleep loss in a manner similar to humans (Journal of Sleep Research, Online-Publication February 27, 2008).

During SWS, the synchronous, slow oscillations of neurons are reflected in the EEG (Electroencephalogram), as large slow-waves with a frequency of less than 4 Hz, hence the name slow-wave sleep. The amount of slow-waves is positively correlated with the depth of sleep, and may reflect restorative processes occurring during sleep. Indeed, humans, and other mammals, recover from periods of sleep loss, primarily by increasing the amount of slow-waves, particularly during the first hours of SWS, in essence sleeping more intensely. Although birds also show SWS, it has been unclear whether they show a similar response to sleep loss. Dolores Martinez-Gonzalez and colleagues at the Max Planck Institute for Ornithology in Seewiesen found now, that birds - in this case pigeons - also do not simply shrug of sleep loss.

In their study, the sleep researchers prevented pigeons from taking naps, something they generally do during the last hours of a day. During the night, the birds were allowed to sleep normally. Although the time spent in SWS did not increase during recovery, the amount of slow-waves did increase, just as in mammals. This means that pigeons, and presumably other birds, have the capacity to recover lost sleep without having to spend more time sleeping. "If pigeons lose sleep when a predator is around, they can recover this lost sleep at a later time by sleeping more deeply. This intensity dimension to avian and mammalian sleep may give animals a certain degree of flexibility in how they acquire their daily sleep requirement", says Niels Rattenborg, co-author of the study and head of the research group Sleep and flight in birds at the Institute.

The way sleep is regulated in birds and mammals seems to be more similar than previously thought. This increases the chances of learning more about the function of sleep in humans by studying sleep in birds.


'/>"/>

Contact: Dr. Niels Rattenborg
rattenborg@orn.mpg.de
49-815-793-2279
Max-Planck-Gesellschaft
Source:Eurekalert  

Related medicine news :

1. J.D. Power and Associates Reports: Riverview Medical Center Recognized for Providing an Emergency Department Experience
2. Northwestern Memorial Hospitals Steven J. Stryker MD Unveils Campaign With Empower Public Relations
3. Venture Global Limited Introduces an Innovative Anti-Cellphone Radiation Sticker Named VEGO Power Blocker
4. Dr. Carolyn Jacob Hires Empower Public Relations
5. Cleveland Clinic Press Consumer Health Book Empowers and Gives Hope to People with Epilepsy
6. Providence Health & Services - Oregon Region Powers Consumer Portal With Kryptiq Connect IQ
7. An Event Added to Celebrate and Empower North Carolina Women
8. Flextronics to Acquire the FRIWO Mobile Power Business Unit of CEAG
9. Healing Our Land, Inc. and The Massachusetts Black Legislative Caucus Convene Prevention Is Power Community Forum on the Impact of HIV/AIDS on Communities of Color in Massachusetts
10. J.D. Power and Associates Reports: The Nebraska Medical Center Recognized for Providing an Outstanding Inpatient Experience for a Third Consecutive Year, and for Providing an Outstanding Cardiovascular Experience
11. The SCOOTER Store Donates Power Wheelchair to New Braunfels Car Crash Victim
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
'Power napping' in pigeons
(Date:10/13/2017)... Las Vegas, Nevada (PRWEB) , ... October 13, 2017 , ... ... of 7® Hemp CBD Oil utilizing Purzorb™ technology. Applying the Purzorb™process to full spectrum ... CBD dose required and providing a CBD form that can be easily incorporated into ...
(Date:10/13/2017)... ... 13, 2017 , ... Lori R. Somekh, founder of the Law Office ... of elder law and special needs planning attorneys. “Membership in ElderCounsel helps our office ... forum to network with elder law attorneys nationwide,” said Somekh. , ElderCounsel ...
(Date:10/13/2017)... SAN LUIS OBISPO, Calif. (PRWEB) , ... October 13, 2017 , ... ... with Alzheimer’s or dementia. However, many long-term care insurance companies have a waiver for ... mean is the 90-day elimination period, when the family pays for care, is often ...
(Date:10/13/2017)... New York, NY (PRWEB) , ... October 13, 2017 , ... ... most influential people in business to advocate for action towards gender equality at their ... 18,000 views from around the globe, and reached a social audience of over 3 ...
(Date:10/13/2017)... , ... October 13, 2017 , ... Yisrayl Hawkins, Pastor ... that explains one of the most popular and least understood books in the Holy ... and puzzling descriptions that have baffled scholars for centuries. Many have tossed it off ...
Breaking Medicine News(10 mins):
(Date:10/5/2017)... ROSEMONT, Ill. , Oct. 5, 2017 /PRNewswire-USNewswire/ ... American Association of Oral and Maxillofacial Surgeons (AAOMS) ... than opioids – to be used as a ... post-surgical pain. ... relationship, the AAOMS White Paper "Opioid Prescribing: Acute ...
(Date:10/2/2017)... , Oct. 2, 2017  Eli Lilly and Company ... results for the third quarter of 2017 on Tuesday, ... call on that day with the investment community and ... The conference call will begin at 9 a.m. ... access a live webcast of the conference call through ...
(Date:9/28/2017)... , Sept. 28, 2017 Cohen Veterans ... advance the use of wearable and home sensors for ... disorders. Early Signal Foundation, a nonprofit organization focused on ... will provide an affordable analytical system to record and ... ...
Breaking Medicine Technology: