ECoG refers to the invasive technique of recording brain electrical field potentials with electrodes placed directly on the cortical surface. ECoG electrodes are typically placed subdurally, above the pia mater. In humans, ECoG is often conducted in patients with medically intractable epilepsy in order to monitor their seizures. Because a craniotomy (a surgical incision into the skull) is required to implant the electrode grid, ECoG is an invasive procedure. Clinical ECoG offers a rare and invaluable research opportunity for obtaining invasive electrophysiological signals in awake, behaving humans. Another avenue of research that is beginning to be explored is cortical stimulation using ECoG electrodes (e.g., Parvizi et al. ( 2013)). The electrode grids often cover much wider areas than the epileptogenic zone, allowing recordings from healthy brain tissue. A postoperative CT...
KeywordsPower Spectrum Local Field Potential Electrode Grid Brain Oscillation Membrane Time Constant
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