Tumor Resection with Brain Mapping

Surgeon: Kyle Kim, MD



Surgeons rely on intraoperative monitoring to evade irreparable damage to the patient's sensory, auditory, and visual structures, as well as injury to the nerves that control movement and reflexes. Cortical mapping allows the surgeon to safely navigate the brain by identifying the central sulcus and localizing specific motor and sensory regions. Although pre-operative localization of both motor and sensory cortex can be done non-invasively with the use of MRI, PET, MEG, or SPECT technology, surgical resection of the brain often requires direct recording from the surface of the brain. Grid electrodes placed on the brain surface generate responses that set spatial limits for the surgeon by indicating which zones of the brain must be avoided so as to eliminate post-operative deficits. The objective of the cortical mapping procedure is to minimize operative risk and morbidity while maximizing the extent of resection.

Intraoperative monitoring (IOM) has become an essential tool during this procedure because of the invasive nature of a craniectomy and the specific location of the surgical exposure, putting structures at risk.