The procedure is done under general anaesthesia and it usually takes 3-4 hours to complete.
Once the anaesthesia has taken effect and you are asleep, your head is fixed in a position and scalp will be prepared for the surgery. The surgeon then makes an incision on the scalp to expose the skull and a circular opening is drilled in the skull to expose the brain tissue.
Brain mapping is done using the intra-operative EEG monitoring and recording by stimulating the brain areas with the subdural electrodes. During mapping, the involved area is localized and with the help of operative microscope the surgeon resects and removes the area of the brain causing seizures.
All the structures are then sutured back and the bone flap is secured to skull with screws. Once this is done you are moved to Neuroscience Intensive Care Unit to monitor your vital signs.