autism is a neurodevelopmental disorder identified by social interaction and verbal and non-verbal communication. it is likely partly inherited, the underlying genetics have not been determined conclusively. environmental factors are also believed to play a role. brain imaging has not identified a common underlying problem. the diagnosis of asperger's was removed in the 2013 fifth edition of the diagnostic and statistical manual of mental disorders , and people with these symptoms are now included within the autism spectrum disorder along with autism and pervasive developmental disorder not otherwise specified.
asperger syndrome appears to result from developmental factors that affect many or all functional brain systems, as opposed to localized effects. it is still possible that as's mechanism is separate from other asds. neuroanatomical studies and the associations with teratogens strongly suggest that the mechanism includes alteration of brain development soon after conception. abnormal migration of embryonic cells during fetal development may affect the final structure and connectivity of the brain, resulting in alterations in the neural circuits that control thought and behavior.Read More»