elaboration of affective and communicative reactions and knowledge would not necessarily lead to their regression or loss.
Structures other than the cerebellum (e.g., limbic, cerebral) and neural functions other than attentional are undoubtedly involved in the social, language, and cognitive deficits seen in autism. These considerations are the topic of future discussions (e.g., Townsend, 1992).
Supported by funds from National Institute of Mental Health Grant 1-RO1- MH36840 and National Institute or Neurological Disorders and Stroke Grant 5-ROI-NS19855 awarded to Eric Courchesne. We thank Lynne Lord for her technical assistance with magnetic resonance imaging, and Robert Elmasian and Kristina Ciesielski for assistance with ERP studies preliminary to those presented herein. Portions of this work and the theory described were presented at the National Conference of the Autism Society of America ( 1989, 1990, & 1991) and at the National Institute of Mental Health ( 1985).
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