Lancaster EPrints

Neurophysiological correlates of error correction in sensorimotor-synchronization.

Praamstra, P. and Turgeon, Martine and Hesse, C. W. and Wing, A. M. and Perryer, L. (2003) Neurophysiological correlates of error correction in sensorimotor-synchronization. NeuroImage, 20 (2). pp. 1283-1297. ISSN 1053-8119

Full text not available from this repository.

Abstract

In a sensorimotor synchronization task requiring subjects to tap in synchrony with an auditory stimulus, occasional perturbations (i.e., interval changes) in an otherwise isochronous sequence of auditory metronome stimuli are known to be compensated remarkably swift and with surprising precision, even when they are too small to be consciously perceived. To investigate the neural substrate and the informational basis of error correction in sensorimotor synchronization, we recorded movement-related, auditory-evoked, and error-related EEG potentials. Experiment 1 confirmed rapid adjustment to stimulus phase shifts, with faster correction of large (50 ms) compared to small (15 ms) shifts. In addition to being corrected faster, there was overcorrection of the 50 ms shifts, attributed to engagement of period correction mechanisms. For 50 ms shifts, a neural correlate of period correction was identified in the form of medial frontal cortex activation, preceded by an error-related brain potential (ERN). Auditory-evoked potential (AEP) amplitudes were sensitive to stimulus phase shifts of both large and small magnitude. Further experiments with a smaller magnitude 10 ms phase shift (Experiment 2) and passive auditory stimulation (Experiment 3) provided evidence that the modulation of AEP amplitudes is not due to metronome interval changes, but may represent auditory-somatosensory activation. Together, behavioral and neurophysiological data support the hypothesis that phase correction is a largely automatic process, not dependent on conscious perception of changes in timing. By contrast, perceivable phase shifts may invoke timekeeper adjustments accompanied by medial frontal cortex activity.

Item Type: Article
Journal or Publication Title: NeuroImage
Subjects: B Philosophy. Psychology. Religion > BF Psychology
Departments: Faculty of Science and Technology > Psychology
ID Code: 11412
Deposited By: Dr Martine Turgeon
Deposited On: 14 Aug 2008 11:20
Refereed?: Yes
Published?: Published
Last Modified: 18 Sep 2013 16:03
Identification Number:
URI: http://eprints.lancs.ac.uk/id/eprint/11412

Actions (login required)

View Item