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Smoking is dumb: Researcher finds link between cigarette smoking and IQ

"Only dopes use dope," goes the memorable warning about drugs. Now a Tel Aviv University researcher cautions that the same goes for cigarettes.

Medicine & Health / Health

created Apr 01, 2010 | popularity 4.1 / 5 (23) | comments 29 | with audio podcast

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

created Jan 30, 2011 | popularity 4.7 / 5 (17) | comments 2 | with audio podcast

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

created Feb 03, 2010 | popularity 4.6 / 5 (10) | comments 11 | with audio podcast

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

created Mar 28, 2010 | popularity 4.5 / 5 (10) | comments 6 | with audio podcast

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

created Nov 12, 2009 | popularity 4.2 / 5 (10) | comments 0

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

created Oct 01, 2010 | popularity 5 / 5 (8) | comments 3 | with audio podcast

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.

Chemistry / Biochemistry

created Jul 20, 2011 | popularity 4 / 5 (9) | comments 8 | with audio podcast

Desire and dread: Brain's computer has separate keyboard to control powerful emotions

(PhysOrg.com) -- Controlling powerful emotional reactions is often difficult because the brain's computer has a separate "keyboard" that controls feelings within extreme emotions like desire and dread, according to University ...

Medicine & Health / Psychology & Psychiatry

created Jun 30, 2010 | popularity 4.7 / 5 (7) | comments 0 | with audio podcast

Scientists seek to manage dopamine's good and bad sides

The good, the bad and the ugly: That's a quick summary of the effects of dopamine, a natural brain chemical that's linked to pleasure, addiction and disease.

Medicine & Health / Medical research

created Oct 07, 2009 | popularity 5 / 5 (6) | comments 0

Study overturns decade-old findings in neurobiology

In findings that should finally put to rest a decade of controversy in the field of neurobiology, a team at The Scripps Research Institute has found decisive evidence that a specific neurotransmitter system -- the endocannabinoid ...

Medicine & Health / Medical research

created May 12, 2010 | popularity 4.3 / 5 (7) | comments 2 | with audio podcast

Sea snail saliva may become new treatment for most severe pain

Scientists have developed a new version of a medication, first isolated from the saliva of sea snails, that could be taken in pill form to relieve the most severe forms of pain as effectively as morphine but without risking ...

Chemistry / Biochemistry

created Jul 29, 2010 | popularity 5 / 5 (6) | comments 1

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

created Sep 30, 2010 | popularity 5 / 5 (5) | comments 1 | with audio podcast

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

created Sep 07, 2010 | popularity 4.8 / 5 (5) | comments 0 | with audio podcast

Scientists uncover previously unknown natural mechanism that controls cocaine use

Scientists from The Scripps Research Institute have found that a particular type of genetic material plays a key role in determining vulnerability to cocaine addiction and may offer an entirely new direction for the development ...

Medicine & Health / Medical research

created Jul 07, 2010 | popularity 4.2 / 5 (5) | comments 1 | with audio podcast

Birds and mammals share a common brain circuit for learning

(PhysOrg.com) -- Bird song learning is a model system for studying the general principles of learning, but attempts to draw parallels between learning in birds and mammals have been difficult because of anatomical ...

Biology / Plants & Animals

created May 18, 2010 | popularity 5 / 5 (4) | comments 0 | with audio podcast

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.

Related topics: brain , alcohol , nicotine