Citation

Kida T, Kaneda T, Nishihira Y. Clin. Neurophysiol. 2012; 123(6): 1123-1130.

Affiliation

Department of Neurobiology and Behavior, Graduate School of Biomedical Sciences, Nagasaki, Japan.

Copyright

(Copyright © 2012, Elsevier Publishing)

DOI

10.1016/j.clinph.2011.10.001

PMID

22030141

Abstract

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.

Language: en