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The term "high-functioning autism" was used in a manner similar to Asperger syndrome, another outdated classification.The defining characteristic recognized by psychologists was a significant delay in the development of early speech and language skills, before the age of three years. [12]
Gastrointestinal symptoms are a common comorbidity in patients with autism spectrum disorders (ASD), even though the underlying mechanisms are largely unknown. The most common gastrointestinal symptoms reported by proprietary tool developed and administered by Mayer, Padua, and Tillisch (2014) are abdominal pain, constipation, diarrhea and ...
Autism spectrum disorder [a] (ASD), or simply autism, is a neurodevelopmental disorder "characterized by persistent deficits in social communication and social interaction across multiple contexts" and "restricted, repetitive patterns of behavior, interests, or activities". [11] Sensory abnormalities are also included in the diagnostic manuals ...
Classic autism, also known as childhood autism, autistic disorder, or Kanner's syndrome, is a formerly diagnosed neurodevelopmental disorder first described by Leo Kanner in 1943. It is characterized by atypical and impaired development in social interaction and communication as well as restricted, repetitive behaviors, activities, and interests.
The Autism – Tics, ADHD, and other Comorbidities Inventory (A–TAC) is a psychological measure used to screen for other conditions occurring with tics. [ 1 ] [ 2 ] Along with tic disorders , it screens for autism spectrum disorders, attention deficit hyperactivity disorder (ADHD) and other conditions with onset in childhood. [ 1 ]
Typical autism, the best-known; Asperger syndrome (9% of autism diagnoses); Rett syndrome; and; Childhood disintegrative disorder (CDD). The first three of these disorders are commonly called the autism spectrum disorders; the last two disorders are much rarer, and are sometimes placed in the autism spectrum and sometimes not. [2] [3]
Among individuals with TS studied in clinics, between 2.9% and 20% had autism spectrum disorders, [59] but one study indicates that a high association of autism and TS may be partly due to difficulties distinguishing between tics and tic-like behaviors or OCD symptoms seen in autistic people. [60]
Echolalia and echopraxia are distinguishing tics of Tourette syndrome (TS); [1] the echolalic repetitions of individuals with TS are mainly echoes from within their own "tic repertoire". [1] Evidence points to a healthy mirror neuron system (MNS), but "inadequate imitation-control mechanism, which make them vulnerable to interferences".