Dual-task repetition alters event-related brain potentials and task performance

Tetsuo Kida*, Takeshi Kaneda, Yoshiaki Nishihira


研究成果: Article査読

23 被引用数 (Scopus)


Objective: We examined the modulation of event-related brain potentials (ERPs) and the accuracy of sensori-motor coordination on short-term repetition of the concurrent performance of a somatosensory discrimination (oddball) task and a visuo-motor tracking task. Methods: The subjects concurrently performed visuomotor tracking and somatosensory oddball tasks. In the dual-task condition, the subjects performed the visuomotor tracking and somatosensory oddball tasks concurrently for about an hour. In the oddball-only condition, they performed just the oddball task for the same period. Results: Tracking performance improved with task repetition. The amplitude of the P300 elicited by somatosensory stimulation in the oddball-only condition decreased significantly with task repetition, whereas in the dual-task condition, it showed a complex pattern of change. The earlier responses were decreased in amplitude in the dual-task condition compared to the oddball-only condition, and gradually decreased with task repetition in both conditions. Conclusions: Dynamic changes in ERPs and task performance with dual-task repetition support the idea that dual-task repetition produces changes in resource allocation following the automation of stimulus processing in addition to so-called habituation. Significance: This study also provides evidence for use of ERP amplitudes as physiological indices of functionally different types of resources.

ジャーナルClinical Neurophysiology
出版ステータスPublished - 2012 6月

ASJC Scopus subject areas

  • 臨床神経学
  • 神経学
  • 生理学(医学)
  • 感覚系


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