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5 - Autism and epilepsy

Published online by Cambridge University Press:  04 February 2011

By
Christopher Gillberg  and
Brian Neville
Edited by
Ilona Roth  and
Payam Rezaie
Ilona Roth
Affiliation:
The Open University, Milton Keynes
Payam Rezaie
Affiliation:
The Open University, Milton Keynes
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Summary

Epilepsy, autism and cognitive impairment are over-represented in all studies that take one of these major categories as the starting point. The rates of epilepsy and autism are related to the severity of cognitive impairment. Those with primary or early regressive autism show a steadily rising rate of epilepsy with age reaching 30–50% in some adult studies but without evidence of causative relationship. Seizures of all types occur with complex partial attacks being prominent but we have no convincing explanation for this relationship. However, in several particularly early onset epilepsies, autism and cognitive impairment develop with the epilepsy suggesting causation (i.e. an epileptic encephalopathy). This process seems to preferentially involve the temporal neocortex and medical or surgical treatment of the epilepsy may cause remission of autistic symptoms in these cases.

Introduction

In 1943, Kanner described 11 children with his then new ‘autistic disturbances of affective contact’ (Kanner, 1943). One of these 11 suffered from epilepsy. In 1971, Kanner reported on a follow-up of the 11 patients; by now, two patients – 18% of his original series – were suffering from epilepsy (Kanner, 1971). Thus, in this seminal report, which defined autism, the patients already formed a clinically heterogeneous group – those with and those without seizures.

What has become clear over the years since Kanner's writings is that patients with autism are, in fact, at greater risk of seizures than are children with other types of developmental problems, such as developmental dysphasia or Down syndrome (Wong, 1993).

Type
Chapter
Information
Researching the Autism Spectrum
Contemporary Perspectives
 , pp. 176 - 189
Publisher: Cambridge University Press
Print publication year: 2011

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