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Amygdala, fear and social relations

Amygdala, fear and social relations
A brain area linked to learning emotional and fear is smaller in people with autism.



BETHLEHEM DIEGO healthy "probably the effect of chronic stress produced by social fear in childhood." Of the 54 participants in the study, all males, 23 were suffering from autism and Asperger syndrome five (disease recently differentiated from autism, which does not affect the appearance, or intelligence, but poses serious problems getting along with others and sometimes leads to inappropriate behavior in patients).

To measure the size of the amygdala were used MRIs. Also asked participants to complete tasks related to social interaction such as eye tracking and recognition of facial expressions of emotions.

Boys with autism and amygdala were smaller also the most long in neutral facial expressions distinguish from other transmitting sadness, anger or joy, and they showed less fixation on the eye region of people with whom they were relating at all times.

These individuals had experienced major difficulties in their relationships with others during childhood.

Moreover, scientists at the University of Wisconsin found that there was a relationship between amygdala volume over time and social symptom severity.

labor director, Richard Davidson, says the findings point to a model of autism where the brain's first reaction to stress in fear of people is overactivity, in turn causes cell death and reduced organ size. In fact, children with milder social problems should also experience a slower reduction of amygdala volume.