Figure 1: Preoperative MRI scans showing an enhancing tumor with a surface projection to the dominant supramarginal gyrus (A, top panel) and postoperative MRI sequences demonstrating T1 shortening with no additional enhancement (A, bottom panel). (B) Positive stimulation sites employing advanced cognitive mapping of praxis and reverse digit span allowed a narrow but safe surgical corridor. (C) Translation of the positive stimulation sites into our evolving brain map, with the segmentation of the supramarginal gyrus. AD: Anterior dorsal, AG: Angular gyrus, AV: Anterior ventral, PD: Posterior dorsal, PV: Posterior ventral, MRI: Magnetic resonance imaging, DLPF: Dorsolateral prefrontal cortex, PMv: Ventral premotor cortex. ©George Samandouras 2022