Inter-Trial Consistency in Sensorimotor Cortex During Finger-Tapping Movements

Optically-pumped magnetometer magnetoencephalography (OPM-MEG) is a new technology to detect neural electrophysiological signals. Inter-trial consistency (ITC) is an important indicator to characterize functional connectivity. It also provides a reliable indicator for verifying the accuracy of OPM-MEG measurements. This paper adopts a finger tapping movement paradigm based on auditory cues, uses OPM-MEG and Electroencephalography (EEG) to measure the functional signals of the brain, and calculates and compares their ITC. The results show that the similarity ratio of ITC between OPM-MEG and EEG is greater than 0.92, which proves OPM-MEG can measure the ITC of the brain and characterize the functional connectivity of the brain. This study verifies the potential of OPM-MEG in motor-related paradigm research.