Transient increase in systemic interferences in the superficial layer and its influence on event-related motor tasks: A functional near-infrared spectroscopy study

Isao Nambu, Takuya Ozawa, Takanori Sato, Takatsugu Aihara, Yusuke Fujiwara, Yohei Otaka, Rieko Osu, Jun Izawa, Yasuhiro Wada

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

Functional near-infrared spectroscopy (fNIRS) is a widely utilized neuroimaging tool in fundamental neuroscience research and clinical investigation. Previous research has revealed that task-evoked systemic artifacts mainly originating from the superficial-tissue may preclude the identification of cerebral activation during a given task. We examined the influence of such artifacts on event-related brain activity during a brisk squeezing movement. We estimated task-evoked superficial-tissue hemodynamics from short source-detector distance channels (15 mm) by applying principal component analysis. The estimated superficial-tissue hemodynamics exhibited temporal profiles similar to the canonical cerebral hemodynamic model. Importantly, this task-evoked profile was also observed in data from a block design motor experiment, suggesting a transient increase in superficial-tissue hemodynamics occurs following motor behavior, irrespective of task design. We also confirmed that estimation of event-related cerebral hemodynamics was improved by a simple superficial-tissue hemodynamic artifact removal process using 15-mm short distance channels, compared to the results when no artifact removal was applied. Thus, our results elucidate task design-independent characteristics of superficial- tissue hemodynamics and highlight the need for the application of superficial-tissue hemodynamic artifact removal methods when analyzing fNIRS data obtained during event-related motor tasks.

Original languageEnglish
Article number035008
JournalJournal of Biomedical Optics
Volume22
Issue number3
DOIs
Publication statusPublished - 01-03-2017

Fingerprint

hemodynamics
Near infrared spectroscopy
Hemodynamics
infrared spectroscopy
interference
Tissue
artifacts
Neuroimaging
neurology
profiles
principal components analysis
compressing
Principal component analysis
brain
Brain
Chemical activation
activation
Detectors
detectors

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Biomaterials
  • Atomic and Molecular Physics, and Optics
  • Biomedical Engineering

Cite this

Nambu, Isao ; Ozawa, Takuya ; Sato, Takanori ; Aihara, Takatsugu ; Fujiwara, Yusuke ; Otaka, Yohei ; Osu, Rieko ; Izawa, Jun ; Wada, Yasuhiro. / Transient increase in systemic interferences in the superficial layer and its influence on event-related motor tasks : A functional near-infrared spectroscopy study. In: Journal of Biomedical Optics. 2017 ; Vol. 22, No. 3.
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Transient increase in systemic interferences in the superficial layer and its influence on event-related motor tasks : A functional near-infrared spectroscopy study. / Nambu, Isao; Ozawa, Takuya; Sato, Takanori; Aihara, Takatsugu; Fujiwara, Yusuke; Otaka, Yohei; Osu, Rieko; Izawa, Jun; Wada, Yasuhiro.

In: Journal of Biomedical Optics, Vol. 22, No. 3, 035008, 01.03.2017.

Research output: Contribution to journalArticle

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AU - Nambu, Isao

AU - Ozawa, Takuya

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AU - Aihara, Takatsugu

AU - Fujiwara, Yusuke

AU - Otaka, Yohei

AU - Osu, Rieko

AU - Izawa, Jun

AU - Wada, Yasuhiro

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