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Journal of Biomedical Optics

Correlation between electrical and hemodynamic responses during visual stimulation with graded contrasts
Author(s): Juanning Si; Xin Zhang; Yuejun Li; Yujin Zhang; Nianming Zuo; Tianzi Jiang
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Paper Abstract

Brain functional activity involves complex cellular, metabolic, and vascular chain reactions, making it difficult to comprehend. Electroencephalography (EEG) and functional near infrared spectroscopy (fNIRS) have been combined into a multimodal neuroimaging method that captures both electrophysiological and hemodynamic information to explore the spatiotemporal characteristics of brain activity. Because of the significance of visually evoked functional activity in clinical applications, numerous studies have explored the amplitude of the visual evoked potential (VEP) to clarify its relationship with the hemodynamic response. However, relatively few studies have investigated the influence of latency, which has been frequently used to diagnose visual diseases, on the hemodynamic response. Moreover, because the latency and the amplitude of VEPs have different roles in coding visual information, investigating the relationship between latency and the hemodynamic response should be helpful. In this study, checkerboard reversal tasks with graded contrasts were used to evoke visual functional activity. Both EEG and fNIRS were employed to investigate the relationship between neuronal electrophysiological activities and the hemodynamic responses. The VEP amplitudes were linearly correlated with the hemodynamic response, but the VEP latency showed a negative linear correlation with the hemodynamic response.

Paper Details

Date Published: 5 August 2016
PDF: 10 pages
J. Biomed. Opt. 21(9) 091315 doi: 10.1117/1.JBO.21.9.091315
Published in: Journal of Biomedical Optics Volume 21, Issue 9
Show Author Affiliations
Juanning Si, Institute of Automation (China)
Chinese Academy of Sciences (China)
Xin Zhang, Institute of Automation (China)
Chinese Academy of Sciences (China)
Yuejun Li, Univ. of Electronic Science and Technology of China (China)
Yujin Zhang, Institute of Automation (China)
Chinese Academy of Sciences (China)
Nianming Zuo, Institute of Automation (China)
Chinese Academy of Sciences (China)
Tianzi Jiang, Institute of Automation (China)
Chinese Academy of Sciences (China)
Univ. of Electronic Science and Technology of China (China)


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