Navigation Links
Research Reveals Why Hungry People Get Cranky
Date:9/16/2011

FRIDAY, Sept. 16 (HealthDay News) -- When people are hungry, they are more likely to be angry or aggressive. And now researchers have found the reason why: serotonin levels -- a hormone that helps regulate behavior -- fluctuate when people are stressed out or haven't eaten, according to a new study.

Rising and falling serotonin levels affect parts of the brain that allow people to control their anger, researchers from the University of Cambridge explained in the report published in the Sept. 15 issue of the journal Biological Psychiatry.

"We've known for decades that serotonin plays a key role in aggression, but it's only very recently that we've had the technology to look into the brain and examine just how serotonin helps us regulate our emotional impulses. By combining a long tradition in behavioral research with new technology, we were finally able to uncover a mechanism for how serotonin might influence aggression," the study's co-first author, Molly Crockett, who worked on the research as a Ph.D. student at Cambridge's Behavioural and Clinical Neuroscience Institute, said in a university news release.

In conducting the study, the researchers controlled the diet of healthy volunteers to manipulate their serotonin levels. The participants' brains were then scanned using functional magnetic resonance imaging (fMRI) as they viewed faces with different expressions -- angry, sad and neutral -- to determine how various parts of their brains reacted and communicated with each other.

The study revealed that low levels of serotonin made communications between certain parts of the brain weaker than normal. The researchers concluded that when this happens it may be harder for the brain to control emotional responses to anger.

The participants also completed a personality questionnaire to assess whether or not they had a natural tendency towards aggression. Those that were predisposed to aggression had even weaker communication between certain regions of their brain when serotonin levels were low, the investigators found.

The findings could be applied to a range of psychiatric disorders in which violence is a common problem, such as intermittent explosive disorder, which is characterized by extreme and uncontrollable outbursts of violence, the authors suggested.

"We are hopeful that our research will lead to improved diagnostics as well as better treatments for this and other conditions," the study's co-first author, Dr. Luca Passamonti, who worked on the research while a visiting scientist at the Cognition and Brain Sciences Unit of the Medical Research Council in Cambridge, England, said in a news release.

More information

The U.S. National Institute of Neurological Disorders and Stroke has more about the brain.

-- Mary Elizabeth Dallas

SOURCE: University of Cambridge, news release, Sept. 15, 2011


'/>"/>
Copyright©2010 ScoutNews,LLC.
All rights reserved  

Related medicine news :

1. Cleveland Clinic researchers awarded NIH grant to study concussion-identifying blood test
2. Put down that Xbox remote: FSU researcher suggests video games may not boost cognition
3. Moffitt researchers find possible key to preventing chemotherapy resistance in ovarian cancer
4. $1.1 million grant targets disparities among medical researchers
5. Yale researchers use uterine stem cells to treat diabetes
6. Wayne State University partners with Toyota on safety research
7. Clemson researchers using interactive vision tool for driving studies
8. Researchers utilize neuroimaging to show how brain uses objects to recognize scenes
9. Institute for Aging Research study finds Bostons elderly homeless sicker than others
10. Researchers focus on secondary stroke prevention after study reveals room for improvement
11. Cognition research aims to reduce medical errors
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Research Reveals Why Hungry People Get Cranky
(Date:12/8/2016)... ... December 08, 2016 , ... ... LLC, announced the first national #QuackGivesBack campaign which supported local breast cancer ... our first franchise-wide Quack Gives Back initiative, and we’re very pleased ...
(Date:12/8/2016)... ... December 08, 2016 , ... CURE Media Group, the nation’s leading ... has aligned with Upstage Lung Cancer in efforts to combat lung cancer, announced CURE ... Hennessy, Jr said, “CURE Media Group is honored to team up with Upstage Lung ...
(Date:12/8/2016)... (PRWEB) , ... December 08, 2016 , ... ... modes of access for customers and employees that are both engaging and easy ... with Service Smart Technology, the software company revealed today its plans to roll ...
(Date:12/8/2016)... ... December 08, 2016 , ... STAT courier is pleased ... a convenient service for Texas, they are expanding their presence in Dallas. One of ... spree that will bring new jobs to the Dallas and Forth Worth market. STAT ...
(Date:12/8/2016)... (PRWEB) , ... December 08, 2016 , ... Vida ... raised an $18M Series B led by Canvas Ventures . Other investors include ... to scale its mobile platform to serve more consumers who are managing chronic ...
Breaking Medicine News(10 mins):
(Date:12/9/2016)... , Dec 9, 2016 Research and ... Market 2016-2020" report to their offering. ... The global travel vaccines market to ... The report covers the present scenario and the growth prospects ... market size, the report considers the revenue generated from the sales ...
(Date:12/8/2016)... Calif. , Dec. 8, 2016 IRIDEX Corporation ... to offer newly issued shares of common stock, $0.01 par ... to an underwritten public offering.  The final terms of the ... time of pricing, and there can be no assurance as ... IRIDEX expects to use the net proceeds it will ...
(Date:12/8/2016)... LONDON , Dec. 8, 2016  The global ... of 8.8% during the forecast period of 2016 to ... billion by 2021 from USD 18.21 billion in 2016. ... surgeries, rising incidences of sports related injuries and spinal ... and rising need of effective blood loss management. ...
Breaking Medicine Technology: