Results 101 to 110 of about 20,121 (213)

Profiling the sleep architecture of ageing adults using a seven‐state continuous‐time Markov model

Journal of Sleep Research, Volume 34, Issue 2, April 2025.
Summary Sleep is a complex biological process regulated by networks of neurons and environmental factors. As one falls asleep, neurotransmitters from sleep–wake regulating neurones work in synergy to control the switching of different sleep states throughout the night. As sleep disorders or underlying neuropathology can manifest as irregular switching,
Jonathon Jacobs, Caitlin E. Martin, Bernard Fuemmeler, Shanshan Chen   +3 more
wiley   +1 more source

Variation in the Photoplethysmogram Response to Arousal From Sleep Depending on the Cause of Arousal and the Presence of Desaturation

IEEE Journal of Translational Engineering in Health and Medicine
Objective: The aim of this study was to assess how the photoplethysmogram frequency and amplitude responses to arousals from sleep differ between arousals caused by apneas and hypopneas with and without blood oxygen desaturations, and spontaneous ...
Mieli Luukinen, Henna Pitkanen, Timo Leppanen, Juha Toyras, Anna Sigridur Islind, Samu Kainulainen, Henri Korkalainen   +6 more
doaj   +1 more source

Comparison of Actigraphy and Polysomnography in a Sleep Centre Cohort

Journal of Sleep Research, EarlyView.
MotionWatch 8 actigraphy correlated most strongly with PSG for total sleep time and showed modest group‐level bias, but wide individual limits of agreement precluded interchangeability. PLMS modified actigraphy‐PSG differences, while recording setting influenced actigraphy‐derived sleep continuity across home and inpatient recordings.
Panagis Drakatos, Iain Duncan, Laura Pérez‐Carbonell, Abidemi I. Otaiku, Fotis Kapsimalis, Sean Higgins, Meir H. Kryger, Adrian J. Williams, Guy D. Leschziner   +8 more
wiley   +1 more source

Reduced Complexity of Pulse Rate Is Associated With Faster Cognitive Decline in Older Adults

Journal of the American Heart Association: Cardiovascular and Cerebrovascular Disease
Background Cardiovascular diseases are closely linked to cognitive health. Subclinical cardiovascular functional changes, such as cardiac autonomic dysfunction, precede cardiovascular diseases and improve risk stratification.
Chenlu Gao, Andrew S. P. Lim, Shahab Haghayegh, Ruixue Cai, Jingyun Yang, Lei Yu, Agustin Ibanez, Aron S. Buchman, David A. Bennett, Lei Gao, Kun Hu, Peng Li   +11 more
doaj   +1 more source

Psychophysiological indicators of emotional arousal in sexual assault survivors: Evaluating ANS reactivity to therapeutic COPE cards within the SEE FAR CBT framework for PTSD treatment

Psychology and Psychotherapy: Theory, Research and Practice, EarlyView.
Abstract Objective SEE FAR CBT is an integrative treatment protocol for PTSD and anxiety disorders, utilizing imagery‐based (fantastic reality) methods through associative therapeutic COPE cards. Although preliminary evidence suggests potential impacts, further validation is necessary to confirm their efficacy in eliciting specific arousal‐affective ...
Sivan Raz, Noa Burchis, Mooli Lahad
wiley   +1 more source

Evaluation Model of Microhemodynamics in Finger Skin at Arterial Occlusion and Post-Occlusive Hyperemia

Fluids
The development of optical noninvasive methods for assessing the functional state of peripheral vessels, including the microcirculatory vascular bed, requires advances in modeling peripheral hemodynamics in order to interpret diagnostic data in terms of ...
Andrey P. Tarasov, Vasily N. Karpov, Dmitry A. Rogatkin   +2 more
doaj   +1 more source

An image-processing toolkit for remote photoplethysmography [PDF]

Objective. Image-processing-based remote photoplethysmography algorithms are usually composed of steps where different methods are used, and often, researchers perform these steps using methods that are not necessarily the best for their application ...
Martínez Sánchez, José María, García Martín, Álvaro, Montalvo Rodrigo, Javier   +2 more
core   +1 more source

Individuals with persisting post‐concussion symptoms with physiological subtype demonstrate altered cardiovascular and autonomic responses to face cooling

Experimental Physiology, EarlyView.
Abstract Individuals with persisting post‐concussion symptoms with physiological subtype (PPCS‐P) demonstrate exercise intolerance due to exacerbation of concussion‐like symptoms during incremental exercise. We tested the hypothesis that individuals with PPCS‐P (n = 12) would have a blunted cardiac autonomic response to face cooling compared to healthy
Phillip J. Wallace, Steve Lidstone, Josh G. Nowlan, Johnathan Ljubanovich, Brandon J. McKinlay, Stephen A. Klassen, Stephen S. Cheung   +6 more
wiley   +1 more source

Noninvasive Assessment of Arterial Stiffness Using Photoplethysmography: Feature Analysis and Machine Learning-Based Estimation of Carotid-Femoral Pulse Wave Velocity

IEEE Access
Cardiovascular diseases are the leading cause of mortality worldwide, underscoring the need for accessible, noninvasive risk assessment. Arterial stiffness, a hallmark of vascular aging, is an established independent predictor of cardiovascular events ...
Kiana Pilevar Abrisham, Khalil Alipour, Bahram Tarvirdizadeh, Mohammad Ghamari   +3 more
doaj   +1 more source

Optimizing cerebrovascular endothelial health through shear stress modulation

Experimental Physiology, EarlyView.
Abstract The endothelium plays a pivotal role in regulating cerebrovascular blood flow, and its dysfunction increases the risk of cerebrovascular disease. Endothelial shear stress, a primary mechanical stimulus for endothelial nitric oxide production, is a key modulator of vascular adaptation.
Erika Iwamoto, Rintaro Sakamoto, Darren P. Casey   +2 more
wiley   +1 more source