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Functional brain monitoring via NIR based optical spectroscopy
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.
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NIRS has been validated for measuring blood flow changes following cerebral activation, including following nutritional interventions.
“The ability of NIRS to measure blood flow changes following cerebral activation has been validated by its use in a number of studies (Fallgatter and Strik 1998; Izzetoglu et al. 2003, 2004; Schroeter et al. 2002; Shibuya-Tayoshi et al. 2007) including following different nutritional interventions (Jackson et al. 2012a, b; Kennedy and Haskell 2011; Kennedy et al. 2010b; Wightman et al. 2014).”
From A Double-Blind, Placebo-Controlled Study Evaluating the Effects of Caffeine and L-Theanine Both Alone and in Combination on Cerebral Blood Flow, Cognition and Mood (2015) · cites this paper as Izzetoglu et al. 2003
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Research works printed but not linked: 6
- 10.1073/pnas.90.8.3770 · DOI
- 10.1364/OE.2.000411 · DOI
- mccarthy, 1997, Infrequent Events Transiently Activate Human Prefrontal and Parietal Cortex as Measured by Functional MRI, Amer Phys Soc, 1630
- 10.1016/S0166-2236(97)01132-6 · DOI
- 10.1016/0959-4388(95)80029-8 · DOI
- 10.1162/08989290051137585 · DOI · Paper page
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Dodd, F. L., Kennedy, D. O., Riby, L. M., & Haskell-Ramsay, C. F. (2015) · Psychopharmacology · doi:10.1007/s00213-015-3895-0 · Cited by 102
“…of NIRS to measure blood flow changes following cerebral activation has been validated by its use in a number of studies (Fallgatter and Strik 1998; Izzetoglu et al. 2003, 2004; Schroeter et al. 2002; ShibuyaTayoshi et al. 2007) including following different nutritional interventions (Jackson et…”
BackgroundMethodInfluential
Metadata
- Authors
- Izzetoglu, K., Yurtsever, G., Bozkurt, A., & Bunce, S.
- Affiliations
- Drexel University (US)
- Venue
- 2003 IEEE 29th Annual Proceedings of Bioengineering Conference
- Publisher
- IEEE
- Published
- 2003-11-04
- Pages
- 335-336
- ISSN
- 1071-121X (ISSN-L)
- OpenAlex
- W2169834812
- Cited by
- 13
- References
- 0
- Citations by year
- 2021: 1 · 2018: 1 · 2016: 1 · 2015: 2 · 2014: 2 · 2013: 1
- FWCI
- 3.95
- Type
- conference paper
- Language
- en
- Open access
- closed
- Locations
- IEEE Annual Northeast Bioengineering Conference (NEBEC) (publishedVersion)
- Topics
- Health Sciences › Medicine › Radiology, Nuclear Medicine and Imaging › Optical Imaging and Spectroscopy Techniques
- Life Sciences › Biochemistry, Genetics and Molecular Biology › Biophysics › Spectroscopy Techniques in Biomedical and Chemical Research
- Physical Sciences › Engineering › Biomedical Engineering › Non-Invasive Vital Sign Monitoring
- Keywords
- functional near-infrared spectroscopy, cerebral hemodynamics, blood oxygenation, blood volume, cognitive tasks, attention, working memory load, n-back task, sustained attention, cognitive slowing, non-invasive brain monitoring
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