0000000001180435

AUTHOR

Nina Forss

showing 3 related works from this author

The effect of alertness and attention on the modulation of the beta rhythm to tactile stimulation

2021

Abstract Beta rhythm modulation has been used as a biomarker to reflect the functional state of the sensorimotor cortex in both healthy subjects and patients. Here, the effect of reduced alertness and active attention to the stimulus on beta rhythm modulation was investigated. Beta rhythm modulation to tactile stimulation of the index finger was recorded simultaneously with MEG and EEG in 23 healthy subjects (mean 23, range 19–35 years). The temporal spectral evolution method was used to obtain the peak amplitudes of beta suppression and rebound in three different conditions (neutral, snooze, and attention). Neither snooze nor attention to the stimulus affected significantly the strength of…

MalePhysiologyEvent related synchronization030204 cardiovascular system & hematology0302 clinical medicinevigilanceAttentionEEGkosketusevent-related synchronizationMEGneuropsykologiaEvent related desynchronization1184 Genetics developmental biology physiologyMagnetoencephalographyElectroencephalographyBAND OSCILLATIONSvireysstimulointiFemaleOriginal ArticleSensorimotor CortexPsychologyaivotArousalCORTICAL OSCILLATIONSevent‐related desynchronizationAdultFREQUENCY ACTIVITYMU RHYTHMMental fatigueELECTRICAL-ACTIVITYLibrary sciencesensomotoriikkatuntoaistibeta oscillation03 medical and health sciencesMOVEMENTYoung Adultevent‐related synchronizationSPACE SEPARATION METHODPhysiology (medical)Physical StimulationHumansMENTAL FATIGUEtarkkaavaisuusFunding AgencyPRIMARY MOTOR CORTEXOriginal ArticlesAlertnessaivokuoriTouchCortical oscillationsBeta Rhythm030217 neurology & neurosurgeryevent-related desynchronization
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Comparing MEG and EEG in detecting the ~20-Hz rhythm modulation to tactile and proprioceptive stimulation

2020

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 st…

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 & neurosurgeryNeuroImage
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Reproducibility of Rolandic beta rhythm modulation in MEG and EEG

2022

The Rolandic beta rhythm, at ∼20 Hz, is generated in the somatosensory and motor cortices and is modulated by motor activity and sensory stimuli, causing a short lasting suppression that is followed by a rebound of the beta rhythm. The rebound reflects inhibitory changes in the primary sensorimotor (SMI) cortex, and thus it has been used as a biomarker to follow the recovery of patients with acute stroke. The longitudinal stability of beta rhythm modulation is a prerequisite for its use in long-term follow-ups. We quantified the reproducibility of beta rhythm modulation in healthy subjects in a 1-year-longitudinal study both for MEG and EEG at T0, 1 month (T1-month, n = 8) and 1 year (T1-ye…

cortical oscillationevent-related synchronizationMEGliikeaistineurofysiologiabiomarkkeritpassive movementEEGcutaneous stimulusmotoriikkaevent-related desynchronization
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