title: Neurologic abnormalities in infantile autism.
abstract: Neuroanatomic, pathologic, and neurobehavioral studies point to a cerebellar and parietal abnormality in autism. We used a standardized protocol to examine neurologic function in 28 pediatric autistic subjects and 24 pediatric normal healthy volunteer controls. As a group, the autistic subjects had quantitative measures from magnetic resonance imaging suggesting hypoplasia or hyperplasia of the cerebellar vermis, as well as measurements of posterior corpus callosum suggesting abnormalities of posterior cortex. In groups of tests that reflect cerebellar and parietal function, the neurologic abnormalities detectable by clinical examination were significantly greater for autistic subjects than for normal controls. These studies confirm that the structural and behavioral deficit in autism does lead to abnormalities that can be detected on the clinical neurologic examination.
authors.affiliation: Department of Neurosciences, University of California San Diego, La Jolla, USA.
authors.forename: R H
authors.initials: RH
authors.lastname: Haas
authors.forename: J
authors.initials: J
authors.lastname: Townsend
authors.forename: E
authors.initials: E
authors.lastname: Courchesne
authors.forename: A J
authors.initials: AJ
authors.lastname: Lincoln
authors.forename: L
authors.initials: L
authors.lastname: Schreibman
authors.forename: R
authors.initials: R
authors.lastname: Yeung-Courchesne
mesh_terms: D000293:Adolescent; D000328:Adult; D001321:Autistic Disorder / Q000150:complications / Q000175:diagnosis / Q000503:physiopathology*; D002531:Cerebellum / Q000002:abnormalities* / Q000503:physiopathology*; D002648:Child; D005260:Female; D005684:Gait; D006801:Humans; D008607:Intellectual Disability / Q000150:complications; D008279:Magnetic Resonance Imaging; D008297:Male; D009123:Muscle Hypotonia / Q000150:complications; D010296:Parietal Lobe / Q000002:abnormalities* / Q000503:physiopathology*; D012720:Severity of Illness Index