Fig. 2.
Penfield stimulation sites. Effects from stimulating human cerebral cortex. This figure summarizes effects reported by Penfield and Rasmussen (1950) in testing many patients. Points of different color mark the approximate locations where different patient responses were evoked, as indicated by the key. The authors did not plot the locations of somatosensory reports, so those data are not shown. Most responses were obtained in or around primary sensory or motor cortex, and large regions of cortex did not reliably produce movements or percepts.