The main aim of this research project was to compare the effects of a parietal lesion in brain tumour patients with effects of prefrontal and premotor lesions on a number of processes related to the ability to operate in near space. More specifically, we studied the effects of a brain tumour lesion on two basic processes such as the ability to (i) reach an object in space and (ii) to integrate spatiotemporal information in a prediction task. Then, two more cognitive processes were investigated, namely (iii) the ability to perform visuospatial transformations and (iv) to encode and retrieve the spatial relation between letters in a string. To that purpose, an anatomical group study approach was used. The method allowed us to better localize the relevant systems involved on the processes investigated..
