News tagged with addiction
Scientists reveal key mechanism governing nicotine addiction
Scientists from the Florida campus of The Scripps Research Institute have identified a pathway in the brain that regulates an individual's vulnerability to the addictive properties of nicotine. The findings suggest a new ...
Medicine & Health / Medical research
Jan 30, 2011 |
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How heroin works: Imaging opioid receptors in the brain
(Phys.org) -- Researchers and doctors have gleaned new clues to the molecular mechanisms behind some of the most addictive substances in the world, thanks to two new studies that uncovered the structures of ...
Apr 25, 2012 |
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Compulsive eating shares addictive biochemical mechanism with cocaine, heroin abuse: study
In a newly published study, scientists from The Scripps Research Institute have shown for the first time that the same molecular mechanisms that drive people into drug addiction are behind the compulsion to overeat, pushing ...
Medicine & Health / Neuroscience
Mar 28, 2010 |
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Dopamine enhances expectation of pleasure in humans
(PhysOrg.com) -- Enhancing the effects of the brain chemical dopamine influences how people make life choices by affecting expectations of pleasure, according to new research from the UCL Institute of Neurology.
Medicine & Health / Neuroscience
Nov 12, 2009 |
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Scientists create vaccine against heroin high
Researchers at The Scripps Research Institute have developed a highly successful vaccine against a heroin high and have proven its therapeutic potential in animal models.
Jul 20, 2011 |
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Miniature 'wearable' PET scanner ready for use (w/ Video)
(PhysOrg.com) -- Scientists from the U.S. Department of Energy's (DOE) Brookhaven National Laboratory, Stony Brook University, and collaborators have demonstrated the efficacy of a "wearable," portable PET ...
Medicine & Health / Medical research
Mar 13, 2011 |
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Scientists crack molecular code regulating neuronal excitability
A key question in protein biochemistry is how proteins recognize "correct" interaction partners in a sea of cellular factors. Nowhere is that more critical to know than in the brain, where interactions governing ...
Medicine & Health / Medical research
Mar 22, 2011 |
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Are you a gambling statistic? New 'expert summary' highlights the prevalence of problem gambling in the U.S.
Living within 10 miles of a casino doubles your risk of problem gambling. This is just one of the compelling statistics in the third "Expert Summary" issued by the University at Buffalo's Research Institute on Addictions.
Other Sciences / Social Sciences
May 09, 2012 |
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Milkshake like cocaine for overeaters: Imaging shows the powerful impact food has on the brain
Millions of overweight Americans consider food the enemy. And according to new research, this enemy plays devious mind games.
Medicine & Health / Neuroscience
Sep 30, 2010 |
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Excessive Internet use is linked to depression
People who spend a lot of time browsing the net are more likely to show depressive symptoms, according to the first large-scale study of its kind in the West by University of Leeds psychologists.
Medicine & Health / Psychology & Psychiatry
Feb 03, 2010 |
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Genetic makeup and duration of abuse reduce the brain's neurons in drug addiction
A study conducted at the U.S. Department of Energy's (DOE) Brookhaven National Laboratory demonstrated that drug addicted individuals who have a certain genetic makeup have lower gray matter density ...
Medicine & Health / Psychology & Psychiatry
Mar 07, 2011 |
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Binge eaters' dopamine levels spike at sight, smell of food
(PhysOrg.com) -- A brain imaging study at the U.S. Department of Energy's (DOE) Brookhaven National Laboratory reveals a subtle difference between ordinary obese subjects and those who compulsively overeat, ...
Medicine & Health / Medical research
Feb 28, 2011 |
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Specific brain areas for sex, money
A team of French researchers headed by Jean-Claude Dreher of the Centre de Neuroscience Cognitive in Lyon, France, has provided the first evidence that the orbitofrontal cortex (located in the anterior ventral ...
Medicine & Health / Neuroscience
Oct 01, 2010 |
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Vaccine blocks cocaine high in mice
Researchers have produced a lasting anti-cocaine immunity in mice by giving them a safe vaccine that combines bits of the common cold virus with a particle that mimics cocaine.
Medicine & Health / Medical research
Jan 04, 2011 |
3.5 / 5 (2) |
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Ritalin improves brain function, task performance in cocaine abusers
(PhysOrg.com) -- Brain-scanning study shows Ritalin improves impaired brain function in people addicted to cocaine, implying it could play a role in facilitating recovery from addiction.
Medicine & Health / Medical research
Sep 07, 2010 |
4.8 / 5 (5) |
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Addiction
The term "addiction" is used in many contexts to describe an obsession, compulsion, or excessive psychological dependence, such as: drug addiction (e.g. alcoholism), video game addiction, crime, money, work addiction, compulsive overeating, problem gambling, computer addiction, nicotine addiction, pornography addiction, etc.
In medical terminology, an addiction is a chronic neurobiologic disorder that has genetic, psychosocial, and environmental dimensions and is characterized by one of the following: the continued use of a substance despite its detrimental effects, impaired control over the use of a drug (compulsive behavior), and preocupation with a drug's use for non-therapeutic purposes (i.e. craving the drug). Addiction is often accompanied the presence of deviant behaviors (for instance stealing money and forging prescriptions) that are used to obtain a drug.
Tolerance to a drug and physical dependence are not defining characteristics of addiction, although they typically accompany addiction to certain drugs. Tolerance is a pharmacologic phenomenon where the dose of a medication needs to be continually increase in order to maintain its desired effects. For instance, individuals with severe chronic pain taking opiate medications (like morphine) will need to continually increase the dose in order to maintain the drug's analgesic (pain-relieving) effects. Physical dependence is also a pharmacologic property and means that if a certain drug is abruptly discontinued, an individual will experience certain characteristic withdrawal signs and symptoms. Many drugs used for therapeutic purposes produce withdrawal symptoms when abruptly stopped, for instance oral steroids, certain antidepressants, benzodiazepines, and opiates.
However, common usage of the term addiction has spread to include psychological dependence. In this context, the term is used in drug addiction and substance abuse problems, but also refers to behaviors that are not generally recognized by the medical community as problems of addiction, such as compulsive overeating.
The term addiction is also sometimes applied to compulsions that are not substance-related, such as problem gambling and computer addiction. In these kinds of common usages, the term addiction is used to describe a recurring compulsion by an individual to engage in some specific activity, despite harmful consequences, as deemed by the user himself to his or her individual health, mental state or social life.
For more information about Addiction, read the full article at
Wikipedia.
This text uses material from Wikipedia and is available under the GNU Free Documentation License.