Design: We will test if inhibitory transcranial magnetic stimulation (TMS) of right-hemispheric cortical areas (inferior frontal gyrus - IFG, superior temporal gyrus - STG, middle temporal gyrus - MTG) that are activated during picture naming will result in a decrease in task performance (picture naming latency) in chronic stroke patients, in comparison to stimulation of left hemispheric areas in aphasics, and right-hemispheric homologue areas in healthy controls. The TMS experiment is necessary to identify a cause-effect link between right hemispheric activation and recovery of language functions after chronic stroke. Stereotactic applications of TMS during the picture naming task will be implemented over six cortical sites in both groups: left IFG, left STG, left MTG, and right IFG, right STG, and right MTG.