Changes of functional response in sensorimotor cortex of preterm and full-term infants during the first year: An fNIRS study

Oliveira, Suelen Rosa de; Machado, Ana Carolina C.P.; Paula, Jonas Jardim de; Novi, Sérgio L.; Mesquita, Rickson C.; Miranda, Débora Marques de; Bouzada, Maria Cândida Ferrarez

doi:10.1016/j.earlhumdev.2019.04.007

Cited by 14 publications

(15 citation statements)

References 34 publications

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“…After the fNIRS data collection, we first removed channels with a low signal-to-noise ratio (SNR), defined as SNR < 8. We computed the SNR as the mean intensity of each channel divided by the standard deviation of the same channel, and the threshold was chosen based on previous works ( de Oliveira et al, 2017 , 2019 ; Forero et al, 2017 ; Novi et al, 2018 ). Next, we converted light intensity at each wavelength of each channel to optical density (OD) and removed motion artifacts with spline interpolation followed by wavelet decomposition ( Scholkmann et al, 2010 ; Molavi and Dumont, 2012 ; Di Lorenzo et al, 2019 ; Novi et al, 2020 ).…”

Section: Methodsmentioning

confidence: 99%

“…where A s_i is the number of activated channels of session i and

is the number of common activated channels in sessions i and j . To verify the channel-wise within-subject reproducibility, we created frequency vectors that show the number of times that each channel was activated over different sessions for a given subject ( de Oliveira et al, 2017 , 2019 ; Novi et al, 2020 ). A high frequency of a given channel means that this channel was recruited over different sessions repeatedly.…”

Section: Methodsmentioning

confidence: 99%

“…In the brain, changes in HbO and HbR reflect (at least partially) neural activity due to neurovascular coupling ( Obrig et al, 2002 ; Devor et al, 2005 ; Rovati et al, 2007 ; Mesquita et al, 2009 ; Ou et al, 2009 ; Phillips et al, 2015 ). Due to its high temporal resolution, portability, and versatility, fNIRS has become a suitable choice to investigate brain function non-invasively over a variety of populations, ranging from neonates to adults, both in the healthy and in the diseased brain ( Tsuji et al, 2000 ; Brown et al, 2002 ; Terborg et al, 2004 ; Kim et al, 2010 , 2014 ; Dehaes et al, 2015 ; de Oliveira et al, 2017 , 2019 ; Forero et al, 2017 ; He et al, 2018 ; Forti et al, 2019 ). More recently, wearable technologies have expanded fNIRS protocols to study activities in natural and unconstrained environments ( Piper et al, 2014 ; McKendrick et al, 2016 ; Pinti et al, 2018 ).…”

Section: Introductionmentioning

confidence: 99%

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Integration of Spatial Information Increases Reproducibility in Functional Near-Infrared Spectroscopy

et al. 2020

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As functional near-infrared spectroscopy (fNIRS) is developed as a neuroimaging technique and becomes an option to study a variety of populations and tasks, the reproducibility of the fNIRS signal is still subject of debate. By performing test-retest protocols over different functional tasks, several studies agree that the fNIRS signal is reproducible over group analysis, but the inter-subject and within-subject reproducibility is poor. The high variability at the first statistical level is often attributed to global systemic physiology. In the present work, we revisited the reproducibility of the fNIRS signal during a finger-tapping task across multiple sessions on the same and different days. We expanded on previous studies by hypothesizing that the lack of spatial information of the optodes contributes to the low reproducibility in fNIRS, and we incorporated a realtime neuronavigation protocol to provide accurate cortical localization of the optodes. Our proposed approach was validated in 10 healthy volunteers, and our results suggest that the addition of neuronavigation can increase the within-subject reproducibility of the fNIRS data, particularly in the region of interest. Unlike traditional approaches to positioning the optodes, in which low intra-subject reproducibility has been found, we were able to obtain consistent and robust activation of the contralateral primary motor cortex at the intra-subject level using a neuronavigation protocol. Overall, our findings support the hypothesis that at least part of the variability in fNIRS cannot be only attributed to global systemic physiology. The use of neuronavigation to guide probe positioning, as proposed in this work, has impacts to longitudinal protocols performed with fNIRS.

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Section: Methodsmentioning

confidence: 99%

“…where A s_i is the number of activated channels of session i and

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Integration of Spatial Information Increases Reproducibility in Functional Near-Infrared Spectroscopy

et al. 2020

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“…a given channel was considered as of appropriate quality if its mean intensity was at least 4 times greater than its standard deviation for both wavelengths. This choice of SNR was based on visual inspections of the raw time-series and on our previous experiences on adult and infant data acquired with the same fNIRS systems 59 – 61 . Since we wanted to investigate the evoked hemodynamic responses in different brain regions, we opted to exclude volunteers that did not have at least 40 channels with good SNR.…”

Section: Methodsmentioning

confidence: 99%

Hearing brain evaluated using near-infrared spectroscopy in congenital toxoplasmosis

Bertachini

Januário

Novi

et al. 2021

Sci Rep

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Congenital toxoplasmosis (CT) is a known cause of hearing loss directly caused by Toxoplasma gondii. Hearing loss might result from sensory, neural, or sensorineural lesions. Early treated infants rarely develop hearing loss, but retinochoroidal lesions, intracranial calcifications and hydrocephalus are common. In this study, we aimed to evaluate the brain evoked hemodynamic responses of CT and healthy infants during four auditory stimuli: mother infant directed speech, researcher infant directed speech, mother reading and researcher recorded. Children underwent Transitionally Evoked Otoacoustic Emission Auditory Testing and Automated Brainstem Auditory Response tests with normal auditory results, but with a tendency for greater latencies in the CT group compared to the control group. We assessed brain hemodynamics with functional near-infrared spectroscopy (fNIRS) measurements from 61 infants, and we present fNIRS results as frequency maps of activation and deactivation for each stimulus. By evaluating infants in the three first months of life, we observed an individual heterogeneous brain activation pattern in response to all auditory stimuli for both groups. Each channel was activated or deactivated in less than 30% of children for all stimuli. There is a need of prospective studies to evaluate if the neurologic or auditory changes course with compromise of children outcomes.

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“…This atlas was the first of its kind, and has been freely disseminated to researchers in a wide range of fields. It has been applied in neonatal atlas‐guided DOT (Chalia et al, 2016; de Oliveira et al, 2019; Singh et al, 2014; Verriotis et al, 2016), and photoacoustic modelling (Ranjbaran et al, 2019), and optical phantom construction (Dempsey, Persad, Powell, Chitnis, & Hebden, 2017).…”

Section: Introductionmentioning

confidence: 99%

Construction and validation of a database of head models for functional imaging of the neonatal brain

Collins-Jones

Poppe

Billing

et al. 2020

Human Brain Mapping

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The neonatal brain undergoes dramatic structural and functional changes over the last trimester of gestation. The accuracy of source localisation of brain activity recorded from the scalp therefore relies on accurate age‐specific head models. Although an age‐appropriate population‐level atlas could be used, detail is lost in the construction of such atlases, in particular with regard to the smoothing of the cortical surface, and so such a model is not representative of anatomy at an individual level. In this work, we describe the construction of a database of individual structural priors of the neonatal head using 215 individual‐level datasets at ages 29–44 weeks postmenstrual age from the Developing Human Connectome Project. We have validated a method to segment the extra‐cerebral tissue against manual segmentation. We have also conducted a leave‐one‐out analysis to quantify the expected spatial error incurred with regard to localising functional activation when using a best‐matching individual from the database in place of a subject‐specific model; the median error was calculated to be 8.3 mm (median absolute deviation 3.8 mm). The database can be applied for any functional neuroimaging modality which requires structural data whereby the physical parameters associated with that modality vary with tissue type and is freely available at http://www.ucl.ac.uk/dot-hub.

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Changes of functional response in sensorimotor cortex of preterm and full-term infants during the first year: An fNIRS study

Cited by 14 publications

References 34 publications

Integration of Spatial Information Increases Reproducibility in Functional Near-Infrared Spectroscopy

Integration of Spatial Information Increases Reproducibility in Functional Near-Infrared Spectroscopy

Hearing brain evaluated using near-infrared spectroscopy in congenital toxoplasmosis

Construction and validation of a database of head models for functional imaging of the neonatal brain

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