Abstract
Objective: To study spatiotemporal patterns of event-related desynchronization (ERD) preceding voluntary sequential finger movements performed with dominant right hand and nondominant left hand. Methods: Nine subjects performed self-paced movements consisting of three key strokes with either hand. Subjects randomized the laterality and timing of movements. Electroencephalogram (EEG) was recorded from 122 channels. Reference-free EEG power measurements in the beta band were calculated off-line. Results: During motor preparation (-2 to -0.5 s with respect to movement onset), contralateral preponderance of event-related desynchronization (ERD) (lateralized power) was only observed during right hand finger movements, whereas ERD during left hand finger movements was bilateral. Conclusions: For right-handers, activation on the left hemisphere during left hand movements is greater than that on the right hemisphere during right hand movements. Significance: We provide further evidence for motor dominance of the left hemisphere in early period of motor preparation for complex sequential finger movements.
Original language | English (US) |
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Pages (from-to) | 1213-1221 |
Number of pages | 9 |
Journal | Clinical Neurophysiology |
Volume | 116 |
Issue number | 5 |
DOIs | |
State | Published - May 2005 |
Externally published | Yes |
Keywords
- Dominance
- Event-related desynchronization/synchronization (ERD/ERS)
- Handedness
- Hemispheric asymmetry
ASJC Scopus subject areas
- Clinical Neurology
- Radiology Nuclear Medicine and imaging
- Neurology
- Sensory Systems
- Physiology (medical)