Aphasia can take many forms; sometimes the ability to understand is impaired although speech production may be preserved. Other forms may have exactly the opposite effect. Some may affect functioning in both receptive and expressive domains. Sometimes reading and writing are affected, but sometimes not. Different types are associated with damage in different portions of the language dominant hemisphere. In short, we refer to these disorders not as a single entity, but rather in the plural—the aphasias—and specify which type we are referring to. In Harold's case, aphasia is certainly a far more
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