Intra- and extra-cranial effects of transient blood pressure changes on brain near-infrared spectroscopy (NIRS) measurements

Minati, Ludovico; Kress, Inge U.; Visani, Elisa; Medford, Nick; Critchley, Hugo

doi:10.1016/j.jneumeth.2011.02.029

Cited by 83 publications

(63 citation statements)

References 26 publications

(22 reference statements)

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“…Task execution may also lead to significant changes in BP during certain experimental tasks such as arm-rising (Minati et al, 2011), anagram task (Tachtsidis et al, 2008a(Tachtsidis et al, ,c, 2009), word generation and constructional puzzle task (Moody et al, 2005), semantic continuous performance task (Jelzow et al, 2011), or emotional picture presentation (Minati et al, 2009). These BP changes affect hemodynamics in the extracerebral compartment, measured as stimulus/task-related changes in SBF and/or volume (SBV) (Kirilina et al, 2012;Takahashi et al, 2011), or even in the cerebral compartment itself (Minati et al, 2011 Another source of systemic component is the influence of the autonomic nervous system (ANS) on the cerebral vasculature (Hamel, 2006;Wahl and Schilling, 1993). For example, Giller et al (2000) showed that a rhythmic handgrip exercise causes a sympathetic-mediated modulation of the hemodynamics in the middle cerebral artery.…”

Section: Classification Of Signal Componentsmentioning

confidence: 99%

A review on continuous wave functional near-infrared spectroscopy and imaging instrumentation and methodology

Scholkmann¹,

Kleiser²,

Metz³

et al. 2014

NeuroImage

1,478

1,394

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This year marks the 20th anniversary of functional near-infrared spectroscopy and imaging (fNIRS/fNIRI). As the vast majority of commercial instruments developed until now are based on continuous wave technology, the aim of this publication is to review the current state of instrumentation and methodology of continuous wave fNIRI. For this purpose we provide an overview of the commercially available instruments and address instrumental aspects such as light sources, detectors and sensor arrangements. Methodological aspects, algorithms to calculate the concentrations of oxy-and deoxyhemoglobin and approaches for data analysis are also reviewed. From the single-location measurements of the early years, instrumentation has progressed to imaging initially in two dimensions (topography) and then three (tomography). The methods of analysis have also changed tremendously, from the simple modified Beer-Lambert law to sophisticated image reconstruction and data analysis methods used today. Due to these advances, fNIRI has become a modality that is widely used in neuroscience research and several manufacturers provide commercial instrumentation. It seems likely that fNIRI will become a clinical tool in the foreseeable future, which will enable diagnosis in single subjects. This year marks the 20th anniversary of functional near-infrared spectroscopy and imaging (fNIRS/fNIRI). As the vast majority of commercial instruments developed until now are based on continuous wave technology, the aim of this publication is to review the current state of instrumentation and methodology of continuous wave fNIRI. For this purpose we provide an overview of the commercially available instruments and address instrumental aspects such as light sources, detectors and sensor arrangements. Methodological aspects, algorithms to calculate the concentrations of oxy-and deoxyhemoglobin and approaches for data analysis are also reviewed. From the single-location measurements of the early years, instrumentation has progressed to imaging initially in two dimensions (topography) and then three (tomography). The methods of analysis have also changed tremendously, from the simple modified Beer-Lambert law to sophisticated image reconstruction and data analysis methods used today. Due to these advances, fNIRI has become a modality that is widely used in neuroscience research and several manufacturers provide commercial instrumentation. It seems likely that fNIRI will become a clinical tool in the foreseeable future, which will enable diagnosis in single subjects. Contents

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Section: Classification Of Signal Componentsmentioning

confidence: 99%

A review on continuous wave functional near-infrared spectroscopy and imaging instrumentation and methodology

Scholkmann¹,

Kleiser²,

Metz³

et al. 2014

NeuroImage

1,478

1,394

View full text Add to dashboard Cite

show abstract

“…Task-evoked change in mean arterial blood pressure (ΔMAP) has been demonstrated for a number of different experimental fNIRS protocols, e.g., arm-raising (ΔMAP ≈ 6 mm Hg), 9 visual stimulation (ΔMAP ≈ 2 mm Hg), 10 anagram solving (ΔMAP ≈ 3 to 5 mm Hg, 11,12 6 to 7 mm Hg), 13 or hypercapnia (ΔMAP ≈ 4 mm Hg), 14 hypocapnia (ΔMAP ≈ 4.5 mm Hg;…”

Section: What Factors Cause False Positives Andmentioning

confidence: 99%

False positives and false negatives in functional near-infrared spectroscopy: issues, challenges, and the way forward

2016

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“…Therefore NIRS measurements reflect changes in cortical hemodynamics, only. More importantly, NIRS signals contain extra-cortical contributions from shallower tissues (e.g., scalp) (Minati et al, 2011;Obrig et al, 2000;Oscillators, 2010;Tachtsidis et al, 2008). Superficial layers account for most of the NIRS signal, and removal of such contamination can be difficult, although possible (Gagnon et al, 2014(Gagnon et al, , 2012.…”

Section: Discussionmentioning

confidence: 99%

Use of near-infrared spectroscopy to probe occlusion severity in patients diagnosed with carotid atherosclerotic disease

Forero

Novi

Avelar

et al. 2017

MRAJ

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Abstract:Atherosclerotic disease has been associated with increased risk of severe neurovascular consequences including transient ischemic attacks, ischemic strokes, and even mortality. Following the onset of carotid stenosis, the brain undergoes different compensatory mechanisms to provide adequate perfusion in order to maintain brain metabolism. In this study, we employed near-infrared spectroscopy (NIRS) to better comprehend how carotid stenosis affects cerebral hemodynamics, both at rest and during activity. Eighteen patients diagnosed with atherosclerotic disease were recruited for a protocol consisting of resting state and vasoreactivity testing performed with breath holding. Although the breath holding challenge induced global vasodilation in all patients, the extent of dilation varied according to the level of stenosis. Patients diagnosed with carotid stenosis have impaired hemodynamic response, with a median 77% vasoreactivity in the hemisphere ipsilateral to the stenotic vessel when compared to the healthy hemisphere. Hemodynamics of these patients differed at rest, with 33% fewer network links in the hemisphere ipsilateral to the stenosis than the healthy hemisphere. On the other hand, hemodynamic patterns were more heterogeneous with patients diagnosed with a carotid occlusion, which correlates with the opening of collateral circulation. Overall, our results suggest that NIRS can open new directions to the investigation of the effects of cerebrovascular atherosclerotic disease.

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Intra- and extra-cranial effects of transient blood pressure changes on brain near-infrared spectroscopy (NIRS) measurements

Cited by 83 publications

References 26 publications

A review on continuous wave functional near-infrared spectroscopy and imaging instrumentation and methodology

A review on continuous wave functional near-infrared spectroscopy and imaging instrumentation and methodology

False positives and false negatives in functional near-infrared spectroscopy: issues, challenges, and the way forward

Use of near-infrared spectroscopy to probe occlusion severity in patients diagnosed with carotid atherosclerotic disease

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