NIMG-99. REAL-TIME DELINEATION OF THE CENTRAL SULCUS WITH THE SPATIAL PROFILE OF SSEPS CAPTURED WITH HIGH-DENSITY ECOG GRID

Abstract OBJECTIVE Cortical mapping during tumor resection is critical to reducing the risk of neurological complications. While somatosensory evoked potential (SSEPs) widely employed delineate central sulcus, response can be misconstrued from manual peak interpretation. This due poor spatial resolution strip electrode as well a result edema or infiltration overlying cortex. We present real-time computer-based visualization system that uses recorded SSEPs with subdural grid aid in cortical mapping. Method: The neural data electrical stimulation median nerve at 0.6Hz are picked up bio-amplifier. artifact bipolar electromyogram (EMG) used onset. ECoG assessed online MATLAB Simulink process and visualize waveform. programmed display SSEP's activation heat map on 2D projected onto screen, showcasing nature activities over contact surface area real-time. RESULTS were 3 patients their awake craniotomies. occupied large where heatmap delineated sulcus. color-coding revealed anterior posterior channels, providing consistently high separation accuracy each patient (accuracy = 98%). could viewed any time point along SSEP trace without CONCLUSION believe this will rapid definition sensorimotor surgical planning provide additional information facilitate interpreting data.