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Proceedings Paper

Simultaneous functional near-infrared brain imaging and event-related potential studies of Stroop effect
Author(s): Jiahuan Zhai; Ting Li; Zhongxing Zhang; Hui Gong
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Paper Abstract

Functional near-infrared brain imaging (fNIRI) and event-related potential (ERP) were used simultaneous to detect the prefrontal cortex (PFC) which is considered to execute cognitive control of the subjects while performing the Chinese characters color-word matching Stroop task with event-related design. The fNIRI instrument is a portable system operating at three wavelengths (735nm & 805nm &850nm) with continuous-wave. The event-related potentials were acquired by Neuroscan system. The locations of optodes corresponding to the electrodes were defined four areas symmetrically. In nine native Chinese-speaking fit volunteers, fNIRI measured the hemodynamic parameters (involving oxy-/deoxy- hemoglobin) changes when the characteristic waveforms (N500/P600) were recorded by ERP. The interference effect was obvious as a longer reaction time for incongruent than congruent and neutral stimulus. The responses of hemodynamic and electrophysiology were also stronger during incongruent compared to congruent and neutral trials, and these results are similar to those obtained with fNIRI or ERP separately. There are high correlations, even linear relationship, in the two kinds of signals. In conclusion, the multi-modality approach combining of fNIRI and ERP is feasible and could obtain more cognitive function information with hemodynamic and electrophysiology signals. It also provides a perspective to prove the neurovascular coupling mechanism.

Paper Details

Date Published: 23 February 2009
PDF: 8 pages
Proc. SPIE 7161, Photonic Therapeutics and Diagnostics V, 71613D (23 February 2009); doi: 10.1117/12.811242
Show Author Affiliations
Jiahuan Zhai, Huazhong Univ. of Science and Technology (China)
Ting Li, Huazhong Univ. of Science and Technology (China)
Zhongxing Zhang, Huazhong Univ. of Science and Technology (China)
Hui Gong, Huazhong Univ. of Science and Technology (China)

Published in SPIE Proceedings Vol. 7161:
Photonic Therapeutics and Diagnostics V
Henry Hirschberg M.D.; Brian Jet-Fei Wong M.D.; Kenton W. Gregory M.D.; Reza S. Malek; Nikiforos Kollias; Bernard Choi; Guillermo J. Tearney; Justus F. R. Ilgner; Steen J. Madsen; Laura Marcu; Haishan Zeng, Editor(s)

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