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Dazzan said that when they looked at the corpus callosum of those who smoke high-strength cannabis, they found that there was a significant difference in the white matter compared to people who have never tried the drug, and people who smoke low-strength cannabis. The THC chemical acts on cannabinoid receptors which the corpus callosum contains. The team utilized two scanning methods to examine the corpus callosum in the brains of 56 patients who reportedly experienced a first episode of psychosis, and 43 healthy participants from the local community. One method required the use of diffusion tensor imaging (DTI) while the...

1/17/2012 Internet Addiction Shows Up In the Brain Digital thrills There’s been a lot of controversy over the concept of Internet Addiction Disorder (IAD), especially as the new DSM-V prepares to launch. Some feel that there’s little evidence to warrant IAD as being recognized as an actual disorder. But others do. Earlier research has found some changes in the brain of people who are hooked on the Web, and a new study shows reductions in volume of certain areas of the brain and in its the white matter – the highways of connection between brain cells – of young people...

Liars' brains 'are not the same'   A deceitful person's brain is different, the study suggests Habitual liars' brains differ from those of honest people, a study says.A University of Southern California team studied 49 people and found those known to be pathological liars had up to 26% more white matter than others. White matter transmits information and grey matter processes it. Having more white matter in the prefrontal cortex may aid lying, the researchers said, But the British Journal of Psychiatry said there were likely to be more differences in the brains of liars. Manipulative behaviourParticipants were volunteers...