Abstract
The language production of a 23 year old patient with developmental aphasia caused by birth injury was analyzed in detail within the framework of Chomsky's generative grammar. It was shown that different stages of grammatical development occur simultaneously, without the predominance of those grammatical forms which are identical with or close to adult grammar. Thus the language of this patient with developmental aphasia is quite comparable to the language of children from 3 to 6, and shares many features with grammatical impairment well known from agrammatism and paragrammatism in adult aphasia. It was suggested that in developmental aphasia incomplete linguistic generalizations are related to an incomplete maturation of inhibitory functions during language acquisition, whereas in adult aphasia comparable forms of less advanced grammars are set free by dissolution of function.
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