Behavioral reaction times are correlated with frequency shift in optical imaging signals

Ata Akin; Scott Bunce

doi:10.1117/12.586673

25 April 2005 Behavioral reaction times are correlated with frequency shift in optical imaging signals

Ata Akin, Scott Bunce

Proceedings Volume 5686, Photonic Therapeutics and Diagnostics; (2005) https://doi.org/10.1117/12.586673
Event: SPIE BiOS, 2005, San Jose, CA, United States

Abstract

Previous research has examined the relationships between physiological parameters and frequency oscillations in hemodynamic activity of brain. The current study used functional near infrared spectroscopy (fNIRS) to examine the relationship between oscillatory hemodynamics and performance measures during a standard cognitive task. fNIR data (n=7) were collected from 16 optodes distributed over dorsolateral prefrontal and inferior frontal cortex during a standard visual "oddball" task while behavioral reaction times to each stimulus were recorded. A frequency analysis of the fNIRS data revealed that the ratio of the power at 0-30 mHz to the power at 30-150 mHz was correlated with the number of mistakes a subject made as, well as their reaction times. Relatively greater low-frequency oscillations were associated with more mistakes and increased behavioral reaction times.

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Ata Akin and Scott Bunce "Behavioral reaction times are correlated with frequency shift in optical imaging signals", Proc. SPIE 5686, Photonic Therapeutics and Diagnostics, (25 April 2005); https://doi.org/10.1117/12.586673

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KEYWORDS

Hemodynamics

Sensors

Brain

Optical imaging

Signal attenuation

Light emitting diodes

Photodetectors

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