Functional brain monitoring via NIR based optical spectroscopy

K. Izzetoglu, G. Yurtsever, A. Bozkurt, S. Bunce

Research output: Chapter in Book/Report/Conference proceedingConference contribution

6 Scopus citations

Abstract

Cognitive activity is associated with changes in optical properties of the brain tissue. Near infrared (NIR) based optical measurements during brain activation can assess the hemodynamic changes, namely blood oxygenation and blood volume. Furthermore, near infrared spectroscopy (NIRS) has recently attracted much interest, since the technology allows the design of portable, safe, affordable, non-invasive and negligibly intrusive monitoring systems. In this paper, we present experimental procedures and results of the functional near infrared (fNIR) measurements acquired from the forehead during cognitive tasks. The data is collected from subjects engaged in two standardized attention and working memory tasks, respectively, the 'target categorization' and the 'n-back memory' tests. In the case of target categorization, the aim is to study changes in blood oxygenation and volume level while participants are experiencing decrements in vigilance, increased lapses of attention and cognitive slowing. Data analysis results revealed that the level of oxygenation changes in missed targets is higher than the level in captured targets. The blood oxygenation and volume level changes during consistently varying "loads" on working memory were measured in participants performing the n-back test. The results show that the level of oxygenation rises with the increase of working memory load.

Original languageEnglish (US)
Title of host publicationProceedings of the IEEE 29th Annual Northeast Bioengineering Conference
EditorsStanley Reisman, Richard Foulds, Bruno Mantilla
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages335-336
Number of pages2
ISBN (Electronic)0780377672
DOIs
StatePublished - Jan 1 2003
Event29th IEEE Annual Northeast Bioengineering Conference, NEBC 2003 - Newark, United States
Duration: Mar 22 2003Mar 23 2003

Publication series

NameProceedings of the IEEE Annual Northeast Bioengineering Conference, NEBEC
Volume2003-January
ISSN (Print)1071-121X
ISSN (Electronic)2160-7001

Other

Other29th IEEE Annual Northeast Bioengineering Conference, NEBC 2003
CountryUnited States
CityNewark
Period3/22/033/23/03

All Science Journal Classification (ASJC) codes

  • Bioengineering

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    Izzetoglu, K., Yurtsever, G., Bozkurt, A., & Bunce, S. (2003). Functional brain monitoring via NIR based optical spectroscopy. In S. Reisman, R. Foulds, & B. Mantilla (Eds.), Proceedings of the IEEE 29th Annual Northeast Bioengineering Conference (pp. 335-336). [1216132] (Proceedings of the IEEE Annual Northeast Bioengineering Conference, NEBEC; Vol. 2003-January). Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/NEBC.2003.1216132