Simultaneous functional near-infrared brain imaging and event-related potential studies of Stroop effect

Jiahuan Zhai; Ting Li; Zhongxing Zhang; Hui Gong

doi:10.1117/12.811242

23 February 2009 Simultaneous functional near-infrared brain imaging and event-related potential studies of Stroop effect

Jiahuan Zhai, Ting Li, Zhongxing Zhang, Hui Gong

Author Affiliations +

Proceedings Volume 7161, Photonic Therapeutics and Diagnostics V; 71613D (2009) https://doi.org/10.1117/12.811242
Event: SPIE BiOS, 2009, San Jose, California, United States

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.

Citation Download Citation

Jiahuan Zhai, Ting Li, Zhongxing Zhang, and Hui Gong "Simultaneous functional near-infrared brain imaging and event-related potential studies of Stroop effect", Proc. SPIE 7161, Photonic Therapeutics and Diagnostics V, 71613D (23 February 2009); https://doi.org/10.1117/12.811242

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KEYWORDS

Hemodynamics

Brain imaging

Electrodes

Brain

Electrophysiology

Neurovascular coupling

Prefrontal cortex

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