Comparison of Decoding Accuracies from Electrocorticogram (ECoG) and Local Filed Potentials (LFPs) During Monkey Arm Movements

摘要

We compared decoding accuracies of arm movement kinematics and electromyography (EMG) activities from intracortical local field potentials (LFPs) and electrocorticogram (ECoG) on the motor cortex of a monkey performing reach-and-grasp movements. Best decoding accuracies from a LFP channel were comparable to ones from a single ECoG in the nearby LFP (decoding of arm movemnts; LFP: R=0.79-0.43, ECoG: R=0.79-0.58, decoding of EMG; LFP: R=0.79-0.48, ECoG: R=0.83-0.45). Most ECoG signals for advantage over a best LFP were recorded from the primary motor cortex and somatosensory area. Our result suggested the ECoG was available for decoding both of arm movement and EMG activities.