Cortical stimulation mapping (CSM) techniques are routinely used to identify regions of language function in patients undergoing neurosurgical procedures. The use of MR technologies holds promise for the development of less invasive assessments of cortical function. However, the relationship between sites of language function identified by CSM and fMRI is not well understood. The present study makes use of visualization and integration tools recently developed by the University of Washington Brain Project for understanding the spatial relationships between sites of language function assessed via CSM and fMRI. Data obtained during tasks of object naming in six patients are presented. Our findings indicate only a moderate spatial correspondence between regions of language distruption identified by CSM and peaks of fMRI activation in temporal language areas.