Article
Neurosciences
Leena N. Shoemaker, Daniel Milej, Jigneshkumar Mistry, Keith St. Lawrence
Summary: Combining DCS and NIRS allows simultaneous monitoring of cerebral hemodynamic parameters, but signal contamination from extracerebral tissue can affect interpretation. This study aimed to evaluate extracerebral signal contamination during transient hypotension and assess means of separating scalp and brain signals.
Article
Biochemical Research Methods
Benjamin Rinehart, Chien-Sing Poon, Ulas Sunar
Summary: The study found that the autistic group had significantly lower blood flow and oxidative metabolism compared to the control group. Combining DCS and fNIRS can provide hemodynamic and metabolic contrasts for noninvasive assessment of autism pathological conditions.
JOURNAL OF BIOPHOTONICS
(2021)
Article
Multidisciplinary Sciences
Daniel L. D. Freitas, Ana F. S. Peres, Lidiane G. Silva, Joao V. M. Mariz, Marcos G. Santos, Rayanne S. P. Morais, Camilo L. M. Morais, Francis L. Martin, Daniel A. Pascoal, Juliana D. de A. S. Camargo, Janaina C. O. Crispim, Kassio M. G. Lima
Summary: The prevention of mother-to-child transmission programs in Brazil have seen success, as access to antiretroviral therapy during pregnancy has led to a reduction in new infections among children. By utilizing near-infrared spectroscopy, pregnant women with and without HIV infection can be quickly and accurately differentiated, offering a new perspective on investigating vertical transmission and providing a potential low-cost screening tool for fast HIV detection.
SCIENTIFIC REPORTS
(2021)
Article
Neurosciences
Kuan Cheng Wu, Alyssa Martin, Marco Renna, Mitchell Robinson, Nisan Ozana, Stefan A. Carp, Maria Angela Franceschini
Summary: This study improves the signal-to-noise ratio of DCS cerebral blood flow using NIRS-PPG, allowing for higher temporal resolution and faster recovery of critical closing pressure and cerebrovascular resistance. It has been successfully demonstrated in healthy subjects and reduces the time needed to obtain relevant parameters.
Article
Computer Science, Software Engineering
Weiwei Jiang, Difeng Yu, Chaofan Wang, Zhanna Sarsenbayeva, Niels van Berkel, Jorge Goncalves, Vassilis Kostakos
Summary: This article introduces a low-cost and practical method for non-invasive inspection using a miniaturized near-infrared spectroscopy scanner and a computer-controlled 2D plotter. The method can successfully extract occluded text through a paper stack of up to 16 pages and improve image quality and decompose overlapping content using a deep-learning-based image enhancement model. It can also be applied to different inks and other layered materials. The approach enables various content embedding applications, including chipless information embedding, physical secret sharing, 3D print evaluations, and steganography.
ACM TRANSACTIONS ON GRAPHICS
(2023)
Article
Spectroscopy
Chen Yang, Xiaodan Ma, Haiou Guan, Bowen Fan
Summary: This study proposes a rapid detection method for different growth stages of Pleurotus eryngii mycelium based on the characteristics of near-infrared spectroscopy. The method uses multivariate scattering correction and competitive adaptive reweighted sampling algorithms to establish a mathematical model between the mycelium and the characteristic wave number. The results show a 99.67% accuracy in identifying different growth stages of Pleurotus eryngii mycelium.
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
(2022)
Article
Neurosciences
Kutlu Kaya, Alexander Zavriyev, Felipe Orihuela-Espina, Mirela Simon, Glenn M. LaMuraglia, Eric T. Pierce, Maria Angela Franceschini, John Sunwoo
Summary: This pilot study demonstrates the feasibility of noninvasively and in real-time monitoring cerebral hemodynamics during carotid endarterectomy using diffuse correlation spectroscopy (DCS) and near-infrared spectroscopy (NIRS). The results indicate that there is partial recovery of cerebral blood flow and an increase in blood volume during the surgery, with no significant changes in compensatory responses to different contralateral stenosis levels.
Review
Physiology
Alwyn Gomez, Amanjyot Singh Sainbhi, Logan Froese, Carleen Batson, Trevor Slack, Kevin Y. Y. Stein, Dean M. M. Cordingley, Francois Mathieu, Frederick A. A. Zeiler
Summary: Cerebral blood flow is a vital physiologic parameter for proper cerebral function and recovery. Current methods of measuring CBF are cumbersome, invasive, or have poor spatial or temporal resolution. Near infrared spectroscopy may provide a non-invasive, topographic, and continuous means of measuring CBF.
FRONTIERS IN PHYSIOLOGY
(2022)
Article
Neurosciences
Yoo Hwan Kim, Youngmin Kim, Jaechul Yoon, Yong Suk Cho, Dohern Kym, Jun Hur, Wook Chun, Byung-Jo Kim
Summary: This study utilized fNIRS to analyze prefrontal cerebral hemodynamics in patients with acute electrical burns, revealing hemodynamic changes during the head-up tilt table test.
FRONTIERS IN HUMAN NEUROSCIENCE
(2022)
Review
Biochemistry & Molecular Biology
Charlotte Delrue, Sander De Bruyne, Marijn M. Speeckaert
Summary: Traditional renal biomarkers are insensitive for early detection of kidney disease. Infrared spectroscopy offers a label-free and non-destructive method for quick and inexpensive diagnosis of kidney disorders. This review provides an overview of the applications of near- and mid-infrared spectroscopy in patients with acute kidney injury and chronic kidney disease.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2023)
Article
Peripheral Vascular Disease
Jingting Yao, Justin D. Sprick, Jinhee Jeong, Jeanie Park, David A. Reiter
Summary: This study used time-frequency spectral analysis of resting near-infrared spectroscopy (NIRS) signals to evaluate the regulation of peripheral microvascular perfusion in CKD patients. The findings suggest that CKD patients have impaired neurogenic and endothelial functions, which may be associated with increased sympathetic activity and reduced endothelial function in CKD.
MICROVASCULAR RESEARCH
(2024)
Article
Multidisciplinary Sciences
Caterina Amendola, Michele Lacerenza, Ileana Pirovano, Davide Contini, Lorenzo Spinelli, Rinaldo Cubeddu, Alessandro Torricelli, Rebecca Re
Summary: The study compared the optical characteristics of PLA and ABS materials at different wavelengths, discussed their potential applications in diffuse optics, and identified the negative impact of material on measurement quality.
Article
Dentistry, Oral Surgery & Medicine
Shigemitsu Sakuma, Kyoko Inamoto, Yoshihiro Yamaguchi, Shinya Takagi, Naoya Higuchi
Summary: This study investigated the pain suppression system in healthy males using fNIRS technology. The results showed that oxy-Hb levels decreased after a gum pain stimulus and returned to baseline within one minute.
JOURNAL OF DENTAL SCIENCES
(2021)
Article
Instruments & Instrumentation
Haimin Hua, Yuan Yi, Huiling Li, Chao Chen
Summary: An analytical model based on near infrared spectroscopy was proposed to predict the main active ingredients of Poria cocos, acidic polysaccharides. Through careful comparison of various pretreatment methods and variable selection methods, a robust and optimal model was established, showing excellent prediction ability.
INFRARED PHYSICS & TECHNOLOGY
(2021)
Article
Spectroscopy
Yunjung Kim, Eunjin Jang, Ji Hyun Shin, Min Kim, Dongho Choi, Hoeil Chung
Summary: This study demonstrated a simple near-infrared spectroscopic scheme for direct measurement of organic phase from human bile, which can be used to identify gallbladder cancer. The proposed scheme allows for recognition of different lipid contents in bile samples using NIR spectroscopy, offering a simpler and faster alternative to previous infrared measurement approaches.
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
(2023)
Article
Hematology
Rogerio Nogueira Soares, Raylene A. Reimer, Patricia K. Doyle-Baker, Juan M. Murias
Summary: This study found that mild obesity affects the responses of arm micro- and macrovascular function, but does not impact the forearm skeletal muscle response to glucose ingestion. Obese individuals showed a significant reduction in brachial artery function after glucose ingestion, whereas no significant changes were observed in lean participants.
Review
Food Science & Technology
Thiago Silveira Alvares, Gustavo Vieira de Oliveira, Monica Volino-Souza, Carlos Adam Conte-Junior, Juan Manuel Murias
Summary: Dietary nitrate ingestion has a positive effect on muscular strength and muscular endurance, with a more significant impact observed during isometric and isotonic contractions. Dosage, frequency of ingestion, training level, muscle group, and type of contraction do not appear to significantly affect the outcomes. Further experimental research is needed to explore this topic.
CRITICAL REVIEWS IN FOOD SCIENCE AND NUTRITION
(2022)
Article
Food Science & Technology
Cristina Rezende, Gustavo Vieira de Oliveira, Monica Volino-Souza, Patricia Castro, Juan Manuel Murias, Thiago Silveira Alvares
Summary: The study showed that turmeric supplementation could improve cerebral oxygenation and blood volume during dynamic handgrip exercise in older males and females. Changes in heart rate and blood pressure were not significant. The findings suggest the potential of curcumin as an intervention for improving cerebral oxygenation and blood volume in older individuals.
INTERNATIONAL JOURNAL OF FOOD SCIENCES AND NUTRITION
(2022)
Article
Physiology
Rafael de Almeida Azevedo, Daniel A. Keir, Jonas Forot, Danilo Iannetta, Guillaume Y. Millet, Juan M. Murias
Summary: This study investigates the relationship between the development of slow component of oxygen uptake and muscle fatigue, finding that they are correlated in a time- and intensity-dependent manner. The results suggest that the slow component of oxygen uptake may depend on muscle fatigue, even if the mechanisms of reduced contractile function differ among intensities.
Article
Physiology
Rafael de Almeida Azevedo, Jonas Forot, Guillaume Y. Millet, Juan M. Murias
Summary: This study investigated the relationship between pulmonary oxygen uptake and muscle oxygen uptake in females and males during cycling exercise at different intensities. The results showed a correlation between the two variables regardless of exercise intensity and sex of the participants.
JOURNAL OF APPLIED PHYSIOLOGY
(2022)
Review
Sport Sciences
Daniel A. Keir, Danilo Iannetta, Felipe Mattioni Maturana, John M. Kowalchuk, Juan M. Murias
Summary: This article highlights the importance of non-invasive identification of lactate threshold and respiratory compensation point during incremental exercise through pulmonary gas exchange and ventilatory variables. It also provides practical strategies for explaining the physiological mechanisms, identifying thresholds, and addressing related issues, as well as an online tool for practice and data analysis.
Article
Nutrition & Dietetics
Y. B. Somani, R. N. Soares, J. Gosalia, J. M. Delgado, M. Flanagan, S. Basu, D. B. Kim-Shapiro, J. M. Murias, D. N. Proctor
Summary: The onset of menopause and changes to ovarian hormones often lead to endothelial dysfunction in women. A study showed that acute dietary nitrate supplementation can improve endothelial function and reduce the magnitude of endothelial dysfunction caused by ischemia-reperfusion injury in healthy, early postmenopausal women.
APPLIED PHYSIOLOGY NUTRITION AND METABOLISM
(2022)
Article
Nutrition & Dietetics
Rafael A. Azevedo, Delbar Jazayeri, Samuel T. Yeung, Rojan Khoshreza, Guillaume Y. Millet, Juan Murias, Saied J. Aboodarda
Summary: Experiencing pain in one leg can decrease exercise tolerance and neuromuscular fatigue development in the contralateral leg. However, the effects of nonlocal experimental pain induced by blood flow occlusion on corticospinal modulation remain unknown. This study found that 25% maximal voluntary contraction (25%IMVC) duration was the shortest during blood flow occlusion, and the decline in maximal voluntary contraction was smaller compared to cycling exercise, indicating that pain reduces exercise performance. Additionally, transcranial magnetic stimulations revealed the modulation of the nervous system in response to pain stimulation.
APPLIED PHYSIOLOGY NUTRITION AND METABOLISM
(2022)
Article
Physiology
Danilo Iannetta, Jenny Zhang, Juan M. Murias, Saied Jalal Aboodarda
Summary: This study evaluated the extent of peripheral and central fatigue, and corresponding perceptual attributes, at task failure following cycling within different exercise intensity domains. The findings demonstrate that the extent of peripheral fatigue is highly domain-specific, whereas the extent of central fatigue is not. Sensations such as fatigue, pain, and dyspnea demonstrated intensity domain specificity and might have contributed to reaching maximal levels of perceived effort and, thus, task failure.
JOURNAL OF APPLIED PHYSIOLOGY
(2022)
Article
Nutrition & Dietetics
Austin T. Beever, Andrea Y. Zhuang, Saied Jalal Aboodarda, Juan M. Murias, Martin J. MacInnis
Summary: Hypoxia has a negative impact on aerobic exercise, but exercise testing in hypoxic conditions has not been extensively studied. This research investigated the effects of simulated altitude on gas exchange threshold, respiratory compensation point, and maximal oxygen uptake. The findings suggest that mild simulated altitude affects maximal oxygen uptake and peak power output significantly, while gas exchange threshold and respiratory compensation point remain unchanged. Moderate altitude decreases all four variables.
APPLIED PHYSIOLOGY NUTRITION AND METABOLISM
(2022)
Article
Physiology
Hilkka Kontro, Craig Bertagnolli, Juan M. Murias, Martin J. MacInnis
Summary: The study found that an elevated COHb concentration intensified physiological responses to exercise at the MLSS and reduced the MLSS in trained individuals. Lower effective [Hb] due to CO inhalation decreased V?O2peak and MLSS performance, with higher aerobic fitness associated with greater impairments.
EXPERIMENTAL PHYSIOLOGY
(2022)
Article
Education, Scientific Disciplines
Serena Trang, Felipe Mattioni Maturana, Juan M. Murias, Michael R. Herbert, Daniel A. Keir
Summary: In exercise physiology, laboratory components are crucial for applying theoretical concepts to personal exercise experiences and introducing data collection and analysis. The gas exchange threshold (GET) and the respiratory compensation point (RCP) are key exercise thresholds that require proper identification. However, the processing and preparation of data have been time-consuming and challenging for students. This article presents a blended laboratory model featuring the Exercise Thresholds App, which provides immediate feedback and eliminates the need for data postprocessing, allowing students to practice threshold identification skills.
ADVANCES IN PHYSIOLOGY EDUCATION
(2023)
Article
Physiology
Rafael de Almeida Azevedo, Pablo R. Fleitas-Paniagua, Mackenzie Trpcic, Danilo Iannetta, Guillaume Y. Millet, Juan M. Murias
Summary: The aim of this study is to investigate the effects of different ramp-incremental (RI) slopes on fatigability and recovery in females and males. The results showed that gender had no significant effect on performance fatigability and recovery, and different RI slopes did not alter the level of performance fatigability at task failure.
JOURNAL OF APPLIED PHYSIOLOGY
(2023)
Article
Physiology
Pablo R. Fleitas-Paniagua, Rafael de Almeida Azevedo, Mackenzie Trpcic, Juan M. Murias, Bruce Rogers
Summary: Detrended fluctuation analysis (DFA a1), an index of heart rate variability (HRV), has been of interest as a surrogate marker for exercise intensity boundaries. This report examined the behavior of heart rate variability thresholds (HRVT) across different ramp incremental slopes. The study found that the cycling ramp slope did not have a significant effect on HRVT1 and HRVT2 in terms of heart rate (HR) or VO2.
PHYSIOLOGICAL REPORTS
(2023)
Article
Physiology
Alessandro Moura Zagatto, Vithor Hugo Fialho Lopes, Yago Medeiros Dutra, Rodrigo Araujo Bonetti de Poli, Eimear Dolan, Letizia Rasica, Juan M. Murias, Paulo Henrique Silva Marques de Azevedo
Summary: This study aimed to investigate the effects of sodium bicarbonate (NaHCO3) ingestion on constant load cycling performance and neuromuscular fatigue. The results showed that NaHCO3 ingestion did not affect performance or indicators of neuromuscular fatigue. However, participants performed better when they were informed that they were ingesting an ergogenic supplement, suggesting a placebo effect may contribute to the apparent ergogenic effect of NaHCO3.
EUROPEAN JOURNAL OF APPLIED PHYSIOLOGY
(2023)