Autism is a condition that disturbs the perceptions and relationships of a patient, which occurs most commonly in children, but whose symptoms may remain for the duration of the life of the sufferer. This disorder is essentially a disturbance in psychological development such that the use of language is impaired, as also are reaction to stimuli, interpretation of the world, and the formation of relationships.
It would appear as though these things occur as a consequence of less than fully established social and communicative characteristics of the person in question, in addition to the fact that sufferers develop restrictive and repetitive personalities that follow unusual patterns.
Some people suffer from just one or two of this range of autism symptoms, making their conditions less severe and not quite autism – or autism disorder, as it is referred to by most medical professionals.
Nonetheless, these folks are not quite perfectly healthy either, because they fall into a category of what is referred to as the autism spectrum of disorders, classified basically based on the symptoms that they display. Anyone who may have a person in their home suffering from any one of these indicators should be well apprised of what they are so as to know what to expect and how to handle it.
There are five disorders that make up the autism spectrum disorders, also called PDDs, or pervasive developmental disorders (PDDs). The first is classic autism or autistic disorder; the second is Asperger’s syndrome; the third, pervasive developmental disorder not otherwise specified (PDD-NOS); the fourth is Rett syndrome; and the fifth, childhood disintegrative disorder.