Blood flow affects light transmission but its impact on NIRS remains unclear

Research output: Contribution to journalComment/debatepeer-review

1 Scopus citations


While most investigators that use near infrared spectroscopy (NIRS)-based techniques do not believe that changes in light transmission are exclusively attributable to hemoglobin changes, most only consider the various hemoglobin moieties when decomposing the source signal. In their commentary, Tomita and colleagues challenge this assumption and speculate that the majority of the NIRS signal is due to flow effects rather than changes in hemoglobin. While the authors present convincing preliminary evidence that flow can affect light transmission, the authors stop short of providing conclusive evidence that the flow effect is indeed significant when using spectroscopic techniques. Nevertheless, the authors raise sufficient concern regarding the potential contribution of the "flow-effect" to warrant further investigations.

Original languageEnglish (US)
Pages (from-to)11-12
Number of pages2
Issue number1
StatePublished - Oct 15 2006
Externally publishedYes

ASJC Scopus subject areas

  • Neurology
  • Cognitive Neuroscience


Dive into the research topics of 'Blood flow affects light transmission but its impact on NIRS remains unclear'. Together they form a unique fingerprint.

Cite this