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One theory on the evolutionary and biological origins of autism traits in Homo sapiens that has gained recent attention in the 2010s and 2020s is that some genes linked to autism may have originated from early humans crossbreeding with Neanderthals, an extinct group of archaic humans (generally regarded as a distinct species, Homo ...
Identical twin studies put autism's heritability in a range between 36% and 95.7%, with concordance for a broader phenotype usually found at the higher end of the range. [28] Autism concordance in siblings and fraternal twins is anywhere between 0 and 23.5%. This is more likely 2–4% for classic autism and 10–20% for a broader spectrum.
Autism spectrum disorder (ASD) or simply autism is a neurodevelopmental disorder that begins in early childhood, persists throughout adulthood, and is characterized by difficulties in social communication and restricted, repetitive patterns of behavior. [1]
The term regressive autism refers to the appearance that neurological development has reversed; it is actually only the affected developmental skills, rather than the neurology as a whole, that regresses. Usually, the apparent onset of regressive autism can be surprising and distressing to parents, who often initially suspect severe hearing ...
Critical autism studies (CAS) is an interdisciplinary research field within autism studies led by autistic people. [1] [2] [3] This field is related to both disability studies and neurodiversity studies. [4] [5] [6] CAS as a discipline is led by autistic academics, and many autistic people engage with the discipline in nonacademic spaces.
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.
Autism Speaks – the world's largest autism advocacy organization that sponsors autism research and conducts awareness and outreach activities aimed at families, governments, and the public; some have argued that it is exploitative and unkind. Gluten-free, casein-free diet – diet that eliminates dietary intake of gluten and casein.
There have been six autism-related genes that are linked to the X chromosome when it comes to autistic spectrum disorder. 5 The first gene that has been linked to autism is the Fragile X mental retardation gene (Fmr1). For example, rodents with this gene exhibit elevated cortical spine densities that are similar to those found in autism as well ...