Why we can’t resist a sinful, dark chocolate cakeJune 30th, 2010 - 2:32 pm ICT by ANI
Washington, June 30 (ANI): Scientists have revealed why is it that despite being on a strict diet, some of us can’t help taking a bite of that sinful, dark chocolate cake.
Professor Ray Dolan and his colleagues have shown that increased levels of dopamine - a chemical in the brain involved in mediating reward, motivation, and learning through reinforcement - affects our will power and makes us act impulsively.
The research may explain why people affected by conditions such as Attention Deficit/Hyperactivity Disorder (ADHD) show extremely impulsive behaviour or why such behaviour can be a potential negative side-effect of L-dopa, a drug used to help alleviate the symptoms of Parkinson’s disease.
In a study, the team administered low dose of L-dopa and then placed the subjects on a placebo.
The results showed that when asked to make a choice, say, receiving 15 pounds in two weeks, or a ‘larger, later’ option, such as receiving 57 pounds in six months, every subject was more likely to behave more impulsively - choosing the ’smaller, sooner’ option when the levels of dopamine were high.
“Lowering dopamine levels may be able to reduce impulsivity, but we need to be certain that this didn’t come at the expense of other, important functions,” explains Dr Alex Pine, first author of the study.
The study is published today in the Journal of Neuroscience. (ANI)
- Brain chemical helps people make decisions - Nov 13, 2009
- New brain imaging technique shows effects of Parkinson's drug - Dec 01, 2010
- How dopamine controls the formation of new neurons in adult brain - Apr 09, 2011
- Dopamine key to decisions based on pleasure - Nov 13, 2009
- ADHD is a genetic disorder, finds study - Sep 30, 2010
- Adult ADHD 'significantly ups risk of common form of dementia' - Jan 19, 2011
- Scientists using gene therapy to treat Parkinson's disease - Oct 15, 2009
- Dopamine 'influences decision making power' - Jan 09, 2010
- Behavioural rewards may mimic effects of medication for ADHD - Apr 19, 2010
- Alterations in the brain's reward system linked to ADHD - Feb 04, 2010
- Scientists discover 'clock protein' that regulates circadian rhythms - Oct 21, 2010
- 'Risky behaviour' in Parkinson patients explained - Jun 24, 2010
- Diabetes linked to schizophrenia - Jun 09, 2010
- Brain parasite affects reward producing chemical - Nov 06, 2011
- Using amphetamines 'ups risk of Parkinson's disease' - Feb 21, 2011
Tags: adhd, attention deficit hyperactivity disorder, attention deficit hyperactivity disorder adhd, chocolate cake, colleagues, dark chocolate, deficit hyperactivity disorder, deficit hyperactivity disorder adhd, dolan, dopamine levels, dr alex, hyperactivity, impulsive behaviour, l dopa, motivation, placebo, professor ray, reinforcement, six months, strict diet