Using subdural electrodes to assess the safety of resections

Subdural electrodes are frequently used to aid in the neurophysiological assessment of patients with intractable seizures. We review their use for localizing cortical regions supporting movement, sensation, and language.

Research Highlights► Afterdischarge and functional thresholds stimulation vary over time and from site to site ► Maps of responses to cortical stimulation vary from the idealized homunculi in textbooks ► When afterdischarges occur, additional stimulation can abort them about half the time