Evaluation of Neural, Systemic and Extracerebral Activations During Active Walking Tasks in Older Adults using fNIRS DOI Creative Commons
Meltem İzzetoğlu, Roee Holtzer

IEEE Transactions on Neural Systems and Rehabilitation Engineering, Journal Year: 2025, Volume and Issue: 33, P. 807 - 817

Published: Jan. 1, 2025

Functional near infrared spectroscopy (fNIRS) is being increasingly used to assess brain hemodynamic responses during active walking in older adults due its wearability, and relative immunity motion artifacts. Specifically, fNIRS allows for continuous monitoring of activations that vary response experimental manipulations cognitive demands tasks. Studies using highlighted increased involvement the prefrontal cortex (PFC) dual compared single task walking, operationalized oxygenated hemoglobin (HbO), increasing attention inherent former condition aging clinical populations. However, current literature utilizing mobility research has not been uniform terms instrumentation characteristics accompanying signal processing methods separate various sources (i.e. neural activations, extracerebral signals, systemic responses) which can raise questions about prior findings. In our previous studies, we have a forehead fNIR sensor (fNIR Imager 1100 by Devices, LLC) with 2.5 cm source detector separation (SDS) at 2 Hz sampling rate allowed us reliably evaluate changes PFC walking. there exists other devices incorporating number different types light detectors allowing multiple channels long (3 SDS) short (0.8 distance measurements complex configurations on head locations depths higher rates ~5 NIRx sensor, NIR Sport2 Medizintechnik GmbH). Such involved designs further implementation advanced algorithms neural, contributions overall measurements. this study, collected imaging data sample healthy (n =15, age ) under (STW) (DTW) conditions; participants were evaluated twice one study visit, once wearing second time while sensor. This design address critical gaps extant concerning fNIRS-derived potential effects penetration depth as defined SDS device, skin blood flow) signals heart rate) observed HbO increases from STW DTW. Our findings suggested activation differences between DTW conditions consistent across instrumentations materially influenced scalp or changes. Nevertheless, efforts optimize extraction should continue taking advantage technological advancement.

Language: Английский

A comprehensive overview of diffuse correlation spectroscopy: theoretical framework, recent advances in hardware, analysis, and applications DOI Creative Commons
Quan Wang, Mingliang Pan, Lucas Kreiß

et al.

NeuroImage, Journal Year: 2024, Volume and Issue: 298, P. 120793 - 120793

Published: Aug. 15, 2024

Diffuse correlation spectroscopy (DCS) is a powerful tool for assessing microvascular hemodynamic in deep tissues. Recent advances sensors, lasers, and learning have further boosted the development of new DCS methods. However, newcomers might feel overwhelmed, not only by already-complex theoretical framework but also broad range component options system architectures. To facilitate entry to this exciting field, we present comprehensive review hardware architectures (continuous-wave, frequency-domain, time-domain) summarize corresponding models. Further, discuss applications highly integrated silicon single-photon avalanche diode (SPAD) sensors DCS, compare SPADs with existing other components (lasers, correlators), as well data analysis tools, including learning. Potential medical diagnosis are discussed an outlook future directions provided, offer effective guidance embark on research.

Language: Английский

Citations

4
Functional near-infrared spectroscopy: A novel tool for detecting consciousness after acute severe brain injury DOI Creative Commons
Karnig Kazazian, Androu Abdalmalak, Sergio L. Novi

et al.

Proceedings of the National Academy of Sciences, Journal Year: 2024, Volume and Issue: 121(36)

Published: Aug. 26, 2024

Recent advancements in functional neuroimaging have demonstrated that some unresponsive patients the intensive care unit retain a level of consciousness is inconsistent with their behavioral diagnosis awareness. Functional near-infrared spectroscopy (fNIRS) portable optical method can be used to measure neural activity good temporal and spatial resolution. However, reliability fNIRS for detecting correlates remains established. In series studies, we evaluated whether record sensory, perceptual, command-driven processing healthy participants behaviorally nonresponsive patients. At individual subject level, demonstrate detect commonly studied resting state networks, sensorimotor processing, speech-specific auditory volitional brain motor imagery task. We then tested three acutely injured found one could willfully modulate when instructed imagine playing game tennis—providing evidence preserved despite no observable signs The successful application awareness among highlights its potential as valuable tool uncovering hidden cognitive states critical settings.

Language: Английский

Citations

4
A case study on artifical intelligence based data processing in passive brain–computer interface DOI

Parveen Kumar Sekharamantry,

S. Usama, Umer Farooq

et al.

Elsevier eBooks, Journal Year: 2025, Volume and Issue: unknown, P. 227 - 250

Published: Jan. 1, 2025

Language: Английский

Citations

0
Insights into Psychosis Risk: Unveiling Impaired Reinforcement Learning through a Behavioral and Functional Near-Infrared Spectroscopy-based Optical Neuroimaging Study DOI Creative Commons

Arndt-Lukas Klaassen,

Chantal Michel,

Miriam Stüble

et al.

Journal of Psychiatric Research, Journal Year: 2025, Volume and Issue: 184, P. 187 - 197

Published: Feb. 1, 2025

Language: Английский

Citations

0
Evaluation of Neural, Systemic and Extracerebral Activations During Active Walking Tasks in Older Adults using fNIRS DOI Creative Commons
Meltem İzzetoğlu, Roee Holtzer

IEEE Transactions on Neural Systems and Rehabilitation Engineering, Journal Year: 2025, Volume and Issue: 33, P. 807 - 817

Published: Jan. 1, 2025

Functional near infrared spectroscopy (fNIRS) is being increasingly used to assess brain hemodynamic responses during active walking in older adults due its wearability, and relative immunity motion artifacts. Specifically, fNIRS allows for continuous monitoring of activations that vary response experimental manipulations cognitive demands tasks. Studies using highlighted increased involvement the prefrontal cortex (PFC) dual compared single task walking, operationalized oxygenated hemoglobin (HbO), increasing attention inherent former condition aging clinical populations. However, current literature utilizing mobility research has not been uniform terms instrumentation characteristics accompanying signal processing methods separate various sources (i.e. neural activations, extracerebral signals, systemic responses) which can raise questions about prior findings. In our previous studies, we have a forehead fNIR sensor (fNIR Imager 1100 by Devices, LLC) with 2.5 cm source detector separation (SDS) at 2 Hz sampling rate allowed us reliably evaluate changes PFC walking. there exists other devices incorporating number different types light detectors allowing multiple channels long (3 SDS) short (0.8 distance measurements complex configurations on head locations depths higher rates ~5 NIRx sensor, NIR Sport2 Medizintechnik GmbH). Such involved designs further implementation advanced algorithms neural, contributions overall measurements. this study, collected imaging data sample healthy (n =15, age ) under (STW) (DTW) conditions; participants were evaluated twice one study visit, once wearing second time while sensor. This design address critical gaps extant concerning fNIRS-derived potential effects penetration depth as defined SDS device, skin blood flow) signals heart rate) observed HbO increases from STW DTW. Our findings suggested activation differences between DTW conditions consistent across instrumentations materially influenced scalp or changes. Nevertheless, efforts optimize extraction should continue taking advantage technological advancement.

Language: Английский

Citations

0