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Premotor programming and cortical processing in the cerebral cortex. Electrophysiological correlates of hemispheric dominance.

Authors
  • Altenmüller, E
  • Jung, R
  • Winker, T
  • Landwehrmeyer, B
Type
Published Article
Journal
Brain, behavior and evolution
Publication Date
Jan 01, 1989
Volume
33
Issue
2-3
Pages
141–146
Identifiers
PMID: 2758293
Source
Medline
License
Unknown

Abstract

Slow brain potentials were averaged from 12-15 EEG records (t = DC or 5 s) before and during voluntary hand movements and writing, spatial vision, language, and calculation tasks without vocalization and with visual fixation. EOG and writing pressure or EMG were recorded simultaneously. Skilled actions caused largest negative potentials in the contralateral sensorimotor hand area. Left-sided lateralization or bilaterally equal surface-negative potential shifts appeared during language and calculation tasks in 90% of the right-handers and in 75% of the left-handers. Right-sided lateralizations occurred during the viewing of perspective Necker figures or random-dot stereograms in the large majority of all subjects.

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