Comorbidities 70 with ASD have 1 40 have 2 other diagnoses Intellectual

Comorbidities 70 with asd have 1 40 have 2 other

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Comorbidities70% with ASD have 1+; 40% have 2+ other diagnosesIntellectual disability (intellectual developmental disorder)Language disorderADHDDevelopmental coordination disorderAnxiety disordersDepressionSpecific learning disability
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Intellectual FeaturesIQ varies70% are estimated to have co-occurring IDNo distinctive IQ profileSplinter skills (25%)Autistic savants (5%)Typically Information is not used to enhance everyday livingTheory of Mind: capacity to mindread/awareness of mental states in themselves and othersExecutive functioning deficitsWeak central coherence (parts instead of whole)
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Prevalence and Developmental CoursePrevalence1-2% of populationOccurs in all social classes and culturesMany causes for the apparent dramatic increase have been proposed… but none scientifically substantiated4-5 times more common in boyswhen girls are affected they tend to have more severe intellectual impairmentsbias in diagnosis/in the absence of co-occurring intellectual or behavioural deficits, girls may be better able to cope with same level of ASD symptomsClinical manifestations are similar, but girls are better at pretend play
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Prevalence and Developmental CourseDevelopmental CourseMost often identified around age 2 (12 to 24 months)Studies show between 6-12 months of age, infants failed to gain new social skills or showed a loss of previously acquired skillsRecent findings shows that a gradual decline in eye contact over the first six months may precede the gradual loss of specific social skills that occurs between 6-12 monthsChildren with ASD develop along different pathways:Some show abnormal behaviour soon after birth25% or more show normal develop for first year or longer and then regressionsOthers show improvement over time. Usually a chronic and lifelong conditionMost show gradual improvement of symptoms with age, but continue to display social impairments compared to othersIQ and language development are the strongest predictors of adult outcomes
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CausesGenetic InfluencesHeritabilityGenetic disordersBrain abnormalitiesStructural abnormalitiesFunctional abnormalitiesBiochemical
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CausesASD is a biologically based neurodevelopmental disorder with multiple causes involving genetic and environmental risk factors.
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Problems in Early Development
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  • Winter '17
  • Paula Cerveny
  • early infantile autism

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