The area of neuropsychology that has received the most attention, both from the traditional localisationalist approach and in the more recent studies in which the disorders are considered from a psychological perspective, is language use. There are several reasons for this, including the marked cerebral asymmetries in the control of language which seem well suited to investigation in terms of the localisation of functions in particular areas of the brain. The structural properties of language itself also offer a ready choice of factors to manipulate and investigate in more psychologically oriented studies. In addition, disorders of language are commonly encountered in stroke patients and in other patients with cerebral injuries, and can take remarkably specifi c forms.