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Exp Brain Res. 2010 Mar;201(3):393-9. doi: 10.1007/s00221-009-2047-3. Epub 2009 Oct 23.

Adaptation to motor-visual and motor-auditory temporal lags transfer across modalities.

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  • 1Department of Psychology, Tilburg University, P.O. Box 90153, 5000 LE, Tilburg, The Netherlands.

Abstract

Previous research has shown that the timing of a sensor-motor event is recalibrated after a brief exposure to a delayed feedback of a voluntary action (Stetson et al. 2006). Here, we examined whether it is the sensory or motor event that is shifted in time. We compared lag adaption for action-feedback in visuo-motor pairs and audio-motor pairs using an adaptation-test paradigm. Participants were exposed to a constant lag (50 or 150 ms) between their voluntary action (finger tap) and its sensory feedback (flash or tone pip) during an adaptation period (approximately 3 min). Immediately after that, they performed a temporal order judgment (TOJ) task about the tap-feedback test stimulus pairings. The modality of the feedback stimulus was either the same as the adapted one (within-modal) or different (cross-modal). The results showed that the point of subjective simultaneity (PSS) was uniformly shifted in the direction of the exposed lag within and across modalities (motor-visual, motor-auditory). This suggests that the TRE of sensor-motor events is mainly caused by a shift in the motor component.

PMID:
19851760
[PubMed - indexed for MEDLINE]
PMCID:
PMC2832876
Free PMC Article
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