Lateralization of movement-related potentials and the size of corpus callosum.
Using structural MRI and whole-head EEG recordings, we analyzed the correlations between the anatomical parameters of the corpus callosum and the hemispheric distribution of the cortical movement-related potentials during right finger and shoulder movements in nine right-handed men. Statistically significant correlation was found only in finger movements. A relatively large genu and the anterior part of the truncus of the corpus callosum correlated with enhanced pre-movement EEG potential over the ipsilateral M1/S1 area. The lateralization of the movement-related potentials correlates with the size of those callosal regions which connect the homologous areas of the primary sensorimotor and frontal cortices.
Stancák
A
A
Third Faculty of Medicine, Charles University, Department of Normal, Pathological and Clinical Physiology, Prague, Czech Republic.
Lücking
C H
CH
Kristeva-Feige
R
R
D000328:Adult; D003337:Corpus Callosum / Q000033:anatomy & histology* / Q000502:physiology*; D004569:Electroencephalography; D004576:Electromyography; D019054:Evoked Potentials, Motor / Q000502:physiology*; D005385:Fingers / Q000294:innervation; D005625:Frontal Lobe / Q000502:physiology; D007839:Functional Laterality / Q000502:physiology*; D006801:Humans; D008279:Magnetic Resonance Imaging; D008297:Male; D009044:Motor Cortex / Q000502:physiology; D009068:Movement / Q000502:physiology*; D012016:Reference Values; D012782:Shoulder / Q000294:innervation; D013003:Somatosensory Cortex / Q000502:physiology