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RESEARCH PRODUCT

Comparing MEG and EEG in detecting the ~20-Hz rhythm modulation to tactile and proprioceptive stimulation

Mia LiljeströmKristina LaaksonenMia IllmanMia IllmanVeikko JousmäkiHarri PiitulainenNina Forss

subject

MaleFINGERAudiologyElectroencephalographySomatosensory system0302 clinical medicineBeta RhythmEEGsensorimotor cortexPassive movementHZTactile stimulationMEGSensory stimulation therapyliikeaistimedicine.diagnostic_test05 social sciencesMagnetoencephalographyElectroencephalographySensorimotor cortexTouch PerceptionNeurologyEXCITABILITYtactile stimulationpassive movementstimulointiFemaleSENSITIVITYAdultmedicine.medical_specialtyBeta rhythmCognitive NeuroscienceBeta reboundStimulus (physiology)MOVEMENT BETA-SYNCHRONIZATIONbeta suppressiontuntoaisti050105 experimental psychologybeta rhythmlcsh:RC321-571FingersYoung Adult03 medical and health sciencesRhythmCORTICAL RHYTHMSPhysical StimulationOSCILLATIONSmedicineHumans0501 psychology and cognitive scienceslcsh:Neurosciences. Biological psychiatry. NeuropsychiatrymotoriikkaProprioceptionbusiness.industryPRIMARY MOTOR CORTEXEVENT-RELATED SYNCHRONIZATIONDESYNCHRONIZATIONbeta rebound3112 NeurosciencesSomatosensory CortexMagnetoencephalographyBeta suppressionProprioceptionbusiness030217 neurology & neurosurgery

description

Abstract Modulation of the ~20-Hz brain rhythm has been used to evaluate the functional state of the sensorimotor cortex both in healthy subjects and patients, such as stroke patients. The ~20-Hz brain rhythm can be detected by both magnetoencephalography (MEG) and electroencephalography (EEG), but the comparability of these methods has not been evaluated. Here, we compare these two methods in the evaluating of ~20-Hz activity modulation to somatosensory stimuli. Rhythmic ~20-Hz activity during separate tactile and proprioceptive stimulation of the right and left index finger was recorded simultaneously with MEG and EEG in twenty-four healthy participants. Both tactile and proprioceptive stimulus produced a clear suppression at 300–350 ​ms followed by a subsequent rebound at 700–900 ​ms after stimulus onset, detected at similar latencies both with MEG and EEG. The relative amplitudes of suppression and rebound correlated strongly between MEG and EEG recordings. However, the relative strength of suppression and rebound in the contralateral hemisphere (with respect to the stimulated hand) was significantly stronger in MEG than in EEG recordings. Our results indicate that MEG recordings produced signals with higher signal-to-noise ratio than EEG, favoring MEG as an optimal tool for studies evaluating sensorimotor cortical functions. However, the strong correlation between MEG and EEG results encourages the use of EEG when translating studies to clinical practice. The clear advantage of EEG is the availability of the method in hospitals and bed-side measurements at the acute phase.

10.1016/j.neuroimage.2020.116804http://www.sciencedirect.com/science/article/pii/S1053811920302913