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Psychopathic Traits Linked to Brain Reward System - NIH Research Matters

Psychopathic Traits Linked to Brain Reward System - NIH Research Matters
March 29, 2010 People who scored high on a test that measures impulsive and antisocial traits had exaggerated brain responses to certain “rewards,” like winning money or taking stimulant drugs. The new study provides evidence that a dysfunctional brain reward system may underlie vulnerability to a personality disorder known as psychopathy. Impulsive and antisocial personality traits correlate with amphetamine-induced dopamine release (red and yellow) in the brain. Image by Buckholtz et al. Psychopathy is characterized by a combination of superficial charm, manipulative and antisocial behavior, impulsivity, blunted empathy and shallow emotional experiences. Many studies of psychopathy have focused on the emotional and interpersonal aspects of the disorder, like lack of fear and empathy. In one experiment, the researchers used positron emission tomography (PET) to image the brain’s dopamine response when participants received a low oral dose of amphetamine.

http://www.nih.gov/researchmatters/march2010/03292010brain.htm

Physics Flash Animations - StumbleUpon We have been increasingly using Flash animations for illustrating Physics content. This page provides access to those animations which may be of general interest. The animations will appear in a separate window. The animations are sorted by category, and the file size of each animation is included in the listing. Also included is the minimum version of the Flash player that is required; the player is available free from The categories are: How Psychopaths Choose Their Victims Recently my journalistic career brought me in contact with a man who, when I first met him, seemed to be the very embodiment of a charming and well-heeled gentleman. He is a natural raconteur, good-looking, athletic, intellectually curious, financially successful, and wittily self-deprecating. What few people know about him is that he has left behind a trail of emotional destruction, having spent decades abusing vulnerable individuals for his own twisted purposes.

Ten Politically Incorrect Truths About Human Nature Human nature is one of those things that everybody talks about but no one can define precisely. Every time we fall in love, fight with our spouse, get upset about the influx of immigrants into our country, or go to church, we are, in part, behaving as a human animal with our own unique evolved nature—human nature. This means two things.

- StumbleUpon And enhancing cognitive prowess later in life could naturally influence one's openness to new experiences, according to a new set of studies. VLADGRIN/Shutterstock Every day it seems like researchers are discovering something else that overturns long-held notions about how the brain operates. In contrast to conventional wisdom, for example, the brain is able to form new neural connections into young adulthood. Now, a new study shows that mental abilities can be boosted -- and aspects of personality enhanced -- well into one's golden years.

The Evolution of the Human Eye The Evolution of the Human Eye Sean D. Pitman M.D. © May. 2001 Updated October 2008 No discussion of evolution seems complete without bringing up the topic of the human eye. Hare Psychopathy Checklist - define, person, people, used, personality, score, traits, Definition, Purpose Photo by: Klaus Eppele Definition The Hare Psychopathy Checklist-Revised (PCL-R) is a diagnostic tool used to rate a person's psychopathic or antisocial tendencies. People who are psychopathic prey ruthlessly on others using charm, deceit, violence or other methods that allow them to get with they want. The symptoms of psychopathy include: lack of a conscience or sense of guilt, lack of empathy, egocentricity, pathological lying, repeated violations of social norms, disregard for the law, shallow emotions, and a history of victimizing others.

mental_floss Blog » 7 Curious Facts About 7 Dr. Seuss Books 1. Hop on Pop In an early draft of the book, Theodor S. The Reality of Repressed Memories In 1990, a landmark case went to trial in Redwood City, California. The defendant, George Franklin, Sr., 51 years old, stood trial for a murder that had occurred more than 20 years earlier. The victim, 8-year-old (Susan Kay Nason, was murdered on September 22, 1969). Franklin's daughter, Eileen, only 8 years old herself at the time of the murder, provided the major evidence against her father. What was unusual about the case is that Eileen's memory of witnessing the murder had been repressed for more than 20 years. Eileen's memory did not come back all at once. The Mirror Equation Ray diagrams can be used to determine the image location, size, orientation and type of image formed of objects when placed at a given location in front of a concave mirror. The use of these diagrams was demonstrated earlier in Lesson 3. Ray diagrams provide useful information about object-image relationships, yet fail to provide the information in a quantitative form. While a ray diagram may help one determine the approximate location and size of the image, it will not provide numerical information about image distance and object size. To obtain this type of numerical information, it is necessary to use the Mirror Equation and the Magnification Equation.

Why Are 80% of Harvard Students First-Borns? That’s my estimate anyways. I remember it like it was yesterday. It was my freshman year at Harvard, and I was going to the first lecture of “Justice” – one of the most popular classes on campus. The lectures took place in Sanders Theater packed by over a thousand students since it’s only offered once every three years. The first question the professor asked – please stand up if you’re the first born child in your family (inclusive of only children). Constructivism Definition Constructivism is a philosophy of learning founded on the premise that, by reflecting on our experiences, we construct our own understanding of the world we live in. Each of us generates our own “rules” and “mental models,” which we use to make sense of our experiences.

5 Psychological Experiments That Prove Humanity is Doomed Cracked.com's new book is now on sale. What follows is one of 22 classic articles that appear in the book, along with 18 new articles that you can't read anywhere else. Psychologists know you have to be careful when you go poking around the human mind because you're never sure what you'll find there. A number of psychological experiments over the years have yielded terrifying conclusions about the subjects. Oh, we're not talking about the occasional psychopath who turns up. Develop Willpower Details Category: Chuck Gallozzi Published on Sunday, 19 April 2009 19:46 Written by Chuck Gallozzi He who lives without discipline dies without honor If we are to be the master of our destiny, we need self-discipline, self-control, willpower, or self-mastery.

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