Navigation Links
'Power napping' in pigeons

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

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:
Related Image:
'Power napping' in pigeons
(Date:6/25/2016)... ... June 25, 2016 , ... First Choice Emergency Room , the largest ... as the Medical Director of its new Mesquite-Samuell Farm facility. , “We are ... Mesquite location,” said Dr. James M. Muzzarelli, Executive Medical Director of First Choice Emergency ...
(Date:6/25/2016)... ... June 25, 2016 , ... ... recover from injury. Recently, he has implemented orthobiologic procedures as a method for ... is one of the first doctors to perform the treatment. Orthobiologics are substances ...
(Date:6/25/2016)... ... 2016 , ... Conventional wisdom preaches the benefits of moderation, whether it’s a ... the bar too high can result in disappointment, perhaps even self-loathing. However, those who ... , Research from reveals that behind the tendency to set ...
(Date:6/24/2016)... (PRWEB) , ... June 24, 2016 , ... Those who ... with these feelings, many turn to unhealthy avenues, such as drug or alcohol abuse, ... Marne, Michigan, has released tools for healthy coping following a traumatic event. , Trauma ...
(Date:6/24/2016)... ... ... Marcy was in a crisis. Her son James, eight, was out of control. Prone to ... , “When something upset him, he couldn’t control his emotions,” remembers Marcy. “If there ... my other children and say he was going to kill them. If we were ...
Breaking Medicine News(10 mins):
(Date:6/23/2016)... Research and Markets has announced the addition ... Chemical (Sugar, Petrochemical, Glycerin), Inorganic Chemical), Functionality (Filler, Binder, ... Forecast to 2021" report to their offering. ... excipients market is projected to reach USD 8.1 Billion ... forecast period 2016 to 2021. The ...
(Date:6/23/2016)... ANGELES , June 23, 2016 ... CAPR ), a biotechnology company focused ... therapeutics, today announced that patient enrollment in its ... in Duchenne) has exceeded 50% of its 24-patient ... enrollment in the third quarter of 2016, and ...
(Date:6/23/2016)... and INDIANAPOLIS , June 23, 2016 ... Lilly Diabetes Tomorrow,s Leaders Scholarship is any indication, the ... announced today online at by the ... diabetes stand in the way of academic and community ... Foundation,s scholarship program since 2012, and continues to advocate ...
Breaking Medicine Technology: