Negative motor networks: Electric cortical stimulation and diffusion tensor imaging - 14/09/20
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Abstract |
Introduction |
This study investigated the networks of Negative motor areas (NMAs) using electric cortical stimulation and diffusion tensor imaging (DTI).
Methods |
Twelve patients with intractable focal epilepsy, in which NMAs were identified by electrical cortical stimulation, were enrolled in this study. Electric stimulation at 50Hz was applied to the electrodes during motor tasks to identify the NMAs. DTI was used to identify the subcortical fibers originating from the NMAs found by electrical stimulation.
Results |
NMAs were found in lateral frontal areas (premotor area (PM) and precentral gyrus) in all 12 patients, in pre-supplementary motor areas (pre-SMAs) in four patients, and in posterior parietal cortices (PPCs) in four. DTI detected fibers connecting to the ipsilateral PMs, PPCs and temporal regions via U-fibers, superior longitudinal fasciculus (SLF), and arcuate fasciculus (AF) from the lateral frontal NMAs. Pre-SMA-NMAs had connections with ipsilateral PMs and contralateral pre-SMAs via the frontal aslant tract and transcallosal commissural fibers, and PPC-NMAs with ipsilateral PMs via SLF and AF.
Conclusion |
This study found the characteristic cortical network of each NMA, and especially revealed new insight of pre-SMA-NMA and PPC NMA. These NMAs might be associated with different mechanism of negative motor response.
Le texte complet de cet article est disponible en PDF.Keywords : Negative motor area, Electric cortical stimulation, Motor processing, Diffusion tensor imaging
Abbreviations : AF, CCEP, CT, DTI, FA, NMA, NMR, PCL, PM, PMA, PPC, ROI, SLF, SMA, VAC, VPC
Plan
Vol 176 - N° 7-8
P. 592-600 - septembre 2020 Retour au numéro
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