ABSTRACT
Cerebrovascular diseases are, with degenerative disorders, those that most frequently affect brain functioning in adult patients. They are also those that better allow, together with focal surgical resections, analysing consequences of circumscribed brain lesions, therefore contributing to identifying neural systems underlying cognitive functions. These considerations apply to nonspatial attention. However, this remains rather poorly evaluated, despite many studies being presented in the last decade. One main problem is that the concept of attention and its different components remains controversial. Detecting and investigating such problems have become far more important since specific rehabilitation techniques have demonstrated a clear efficiency (Sturm and Willmes, 1991).
