Localization of Sensorimotor Cortex Using Navigated Transcranial Magnetic Stimulation and Magnetoencephalography

Show full item record



Permalink

http://hdl.handle.net/10138/305775

Citation

Pitkanen , M , ShogoYazawa , , Airaksinen , K , Lioumis , P , Nurminen , J , Pekkonen , E & Makela , J P 2019 , ' Localization of Sensorimotor Cortex Using Navigated Transcranial Magnetic Stimulation and Magnetoencephalography ' , Brain Topography , vol. 32 , no. 5 , pp. 873-881 . https://doi.org/10.1007/s10548-019-00716-w

Title: Localization of Sensorimotor Cortex Using Navigated Transcranial Magnetic Stimulation and Magnetoencephalography
Author: Pitkanen, Minna; ShogoYazawa,; Airaksinen, Katja; Lioumis, Pantelis; Nurminen, Jussi; Pekkonen, Eero; Makela, Jyrki P.
Other contributor: University of Helsinki, HUS Neurocenter
University of Helsinki, HUS Medical Imaging Center
University of Helsinki, HUS Medical Imaging Center
University of Helsinki, HUS Neurocenter
University of Helsinki, HUS Medical Imaging Center






Date: 2019-09
Language: eng
Number of pages: 9
Belongs to series: Brain Topography
ISSN: 0896-0267
DOI: https://doi.org/10.1007/s10548-019-00716-w
URI: http://hdl.handle.net/10138/305775
Abstract: The mapping of the sensorimotor cortex gives information about the cortical motor and sensory functions. Typical mapping methods are navigated transcranial magnetic stimulation (TMS) and magnetoencephalography (MEG). The differences between these mapping methods are, however, not fully known. TMS center of gravities (CoGs), MEG somatosensory evoked fields (SEFs), corticomuscular coherence (CMC), and corticokinematic coherence (CKC) were mapped in ten healthy adults. TMS mapping was performed for first dorsal interosseous (FDI) and extensor carpi radialis (ECR) muscles. SEFs were induced by tactile stimulation of the index finger. CMC and CKC were determined as the coherence between MEG signals and the electromyography or accelerometer signals, respectively, during voluntary muscle activity. CMC was mapped during the activation of FDI and ECR muscles separately, whereas CKC was measured during the waving of the index finger at a rate of 3-4 Hz. The maximum CMC was found at beta frequency range, whereas maximum CKC was found at the movement frequency. The mean Euclidean distances between different localizations were within 20 mm. The smallest distance was found between TMS FDI and TMS ECR CoGs and longest between CMC FDI and CMC ECR sites. TMS-inferred localizations (CoGs) were less variable across participants than MEG-inferred localizations (CMC, CKC). On average, SEF locations were 8 mm lateral to the TMS CoGs (p <0.01). No differences between hemispheres were found. Based on the results, TMS appears to be more viable than MEG in locating motor cortical areas.
Subject: Navigated transcranial magnetic stimulation
Magnetoencephalography
Motor evoked potential
Corticomuscular coherence
Corticokinematic coherence
Somatosensory evoked field
CORTICO-MUSCULAR COHERENCE
SIGNAL SPACE SEPARATION
MOTOR-CORTEX
CORTICOKINEMATIC COHERENCE
HAND
MEG
BRAIN
REPRESENTATION
TMS
FIELDS
3112 Neurosciences
3124 Neurology and psychiatry
Rights:


Files in this item

Total number of downloads: Loading...

Files Size Format View
Localization_of_Sensorimotor_Cortex.pdf 738.8Kb PDF View/Open

This item appears in the following Collection(s)

Show full item record