Results 81 to 90 of about 15,556 (297)

Estimating the distribution of dynamic invariants: Illustrated with an application to human photo-plethysmographic time series [PDF]

arXiv, 2003
Dynamic invariants are often estimated from experimental time series with the aim of differentiating between different physical states in the underlying system. The most popular schemes for estimating dynamic invariants are capable of estimating confidence intervals, however such confidence intervals do not reflect variability in the underlying ...
arxiv  

The impact of COVID‐19 severity on adult survivors: Is there a relationship between vascular reactivity and cardiorespiratory fitness?

Physiological Reports, Volume 13, Issue 5, March 2025.
Abstract The impact of COVID‐19 on cardiorespiratory fitness (CRF) is negative, increasing the likelihood of exertional symptoms such as fatigue and shortness of breath, and adversely affecting vascular function, impairing cardiovascular health. This study investigated endothelial function and its relationship with CRF in patients who have recovered ...
Guilherme Dionir Back, Murilo Rezende Oliveira, Guilherme Peixoto Tinoco Arêas, Patricia Faria Camargo, Cássia da Luz Goulart, Claudio Ricardo de Oliveira, José Carlos Bonjorno Junior, Flávia Rossi Caruso Bonjourno, Ross Arena, Audrey Borghi‐Silva   +9 more
wiley   +1 more source

Compromised dynamic cerebral autoregulation in patients with a right-to-left shunt: a potential mechanism of migraine and cryptogenic stroke. [PDF]

PLoS ONE, 2014
The relationship between right-to-left shunts (RLS) and migraine and cryptogenic stroke is not well understood. In this study, we investigated whether RLS are associated with impairment of dynamic cerebral autoregulation (dCA), which may play a role in ...
Zhen-Ni Guo, Yingqi Xing, Jia Liu, Shuang Wang, Shuo Yan, Hang Jin, Yi Yang   +6 more
doaj   +1 more source

Nicotinamide Phosphoribosyltransferase Acetylation Mediating Muscle Dysfunction Contributes to Sleep Apnoea in Obesity

Journal of Cachexia, Sarcopenia and Muscle, Volume 16, Issue 1, February 2025.
ABSTRACT Background Obstructive sleep apnoea (OSA) occurs frequently among individuals with obesity, which is attributed to upper airway muscle dysfunction. Muscle function is regulated by the dynamic balance of the nicotinamide adenine dinucleotide (NAD+) and its reduced form (NADH), which is controlled by the enzyme nicotinamide ...
Liu Zhang, Ya Ru Yan, Shi Qi Li, Ying Ni Lin, Yi Wang, Yu Qing Wang, Ning Li, Fang Ying Lu, Xian Wen Sun, Li Yue Zhang, Jian Ping Zhou, Yong Jie Ding, Qing Yun Li   +12 more
wiley   +1 more source

Respiratory component of the orienting reflex: a novel sensitive index of sensory-induced arousal in rats.

Frontiers in Physiology, 2012
In humans, the integrated response to a novel stimulus (orienting reflex) includes behavioral (head turning etc) and well-characterized physiological components (changes in heart rate, respiration, skin conductance, and EEG patterns).
Eugene eNalivaiko, Evgeny eBondarenko, Andreas eLidstrom, Robert J Barry   +3 more
doaj   +1 more source

Skin optical attenuation coefficient modulation with arterial pulsation [PDF]

arXiv, 2018
Video plethysmographic (vPPG) signals arise from subtle color modulations in reflected light. vPPG signals can be used to monitor vital signs remotely in a noninvasive manner. We have used optical coherence tomography (OCT) imaging to find whether vPPG signals may result from skin optical properties being modulated by arterial transmural pressure ...
arxiv  

Emotion Detection Using Noninvasive Low Cost Sensors

, 2017
Emotion recognition from biometrics is relevant to a wide range of application domains, including healthcare. Existing approaches usually adopt multi-electrodes sensors that could be expensive or uncomfortable to be used in real-life situations.
Girardi, Daniela, Lanubile, Filippo, Novielli, Nicole   +2 more
core   +1 more source

Ethanol reversal of tolerance to the respiratory depressant effects of morphine [PDF]

, 2015
Opioids are the most common drugs associated with unintentional drug overdose. Death results from respiratory depression. Prolonged use of opioids results in the development of tolerance but the degree of tolerance is thought to vary between different ...
A Fugelstad, A Fugelstad, Abi Lyndon, AJ Ruttenber, Anne Lingford-Hughes, AR Lingford-Hughes, B Levine, BM Mathers, CA Paronis, Chris Bailey, CK Kuo, CN Lessov, CP Bailey, CP Bailey, CP Bailey, E Kelly, E Valjent, Eamonn Kelly, EB Rex, EJ Waite, F Chen, FL Smith, FL Smith, Graeme Henderson, GS Ling, H Sakakibara, HW Matthes, HY Lin, I Rodriguez-Martin, J Llorente, J McPherson, J Reneau, JM White, Joanne Roberts, John MacLachlan, JT Williams, JW Lewis, KL McGilliard, L He, LC Hull, LC Saland, LJ Sim-Selley, LM Bohn, LQ Hong-Brown, M Aliczki, M Hickman, M Hickman, M Inoue, M Pierce, Matthew Hickman, N Quillinan, NG Shah, R Cornish, R Romberg, Rob Hill, S Darke, S Darke, S Kishioka, Sarah Withey, SJ Slater, SV Dighe, TC Green, Yvonne Kershaw   +62 more
core   +3 more sources

Effectiveness of peer‐delivered sleep health education and social support in increasing OSA evaluation among at‐risk blacks

Journal of Sleep Research, Volume 34, Issue 1, February 2025.
Summary To assess the effectiveness of culturally and linguistically tailored, peer‐delivered obstructive sleep apnea education and of social support to increase adherence to physician‐recommended obstructive sleep apnea evaluation among blacks. In a two‐arm randomised controlled trial, we ascertained the effectiveness of peer‐delivered obstructive ...
Girardin Jean‐Louis, P. Jin, R. Moise, J. Blanc, A. Rogers, O. M. Bubu, D. Chung, F. Zizi, A. A. Seixas   +8 more
wiley   +1 more source

The nuclear progesterone receptor reduces post-sigh apneas during sleep and increases the ventilatory response to hypercapnia in adult female mice. [PDF]

PLoS ONE, 2014
We tested the hypothesis that the nuclear progesterone receptor (nPR) is involved in respiratory control and mediates the respiratory stimulant effect of progesterone.
François Marcouiller, Ryma Boukari, Sofien Laouafa, Raphaël Lavoie, Vincent Joseph   +4 more
doaj   +1 more source