Title :
Trial-to-trial variability differs between low versus high responders in motor imagery: Near-infrared spectroscopy study
Author :
Holper, Lisa ; Wolf, Martin ; Kobashi, Nagisa ; Kiper, Daniel ; Eng, Kynan
Author_Institution :
Biomedical Optics Research Laboratory (BORL), Division of Neonatology, Department of Obstetrics and Gynecology, University Hospital Zurich, Frauenklinikstrasse 10, 8091, Switzerland
Abstract :
Trial-to-trial variability is a well-known issue in brain signals measured by functional near-infrared spectroscopy (fNIRS) and other modalities. The aim of this study was to quantitatively characterize the variations from trial-to-trial. We recorded fNIRS during motor imagery (MI) and motor execution (ME) in a virtual reality (VR) system. The results of the averaged Δ[O2Hb] fNIRS responses during the two tasks showed that two distinct groups could be differentiated: low responders (LR) and high responders (HR). Within these groups, distinct oxygenation pattern of trial-to-trial variability were identified. Our findings show a relationship of trial-to-trial variability to individual performance in MI, which may be of significance for applications of MI in neurorehabilitation.
Keywords :
Head; Mirrors; Spectroscopy; Virtual reality; Wireless communication; Wireless sensor networks; motor imagery (MI); trial-to-trial variability; wireless functional near-infrared spectroscopy (fNIRS);
Conference_Titel :
Virtual Rehabilitation (ICVR), 2011 International Conference on
Conference_Location :
Zurich, Switzerland
Print_ISBN :
978-1-61284-475-6
Electronic_ISBN :
978-1-61284-473-2
DOI :
10.1109/ICVR.2011.5971832