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Total 1739 results found since Jan 2013.

Cardiorespiratory coupling in the bottlenose dolphin (Tursiops truncatus)
Discussion: These data provide improved understanding of the cardiorespiratory coupling in dolphins, and show how both exhalation and inhalation alters ifH.
Source: Frontiers in Physiology - September 21, 2023 Category: Physiology Source Type: research

Astrocytes in functional recovery following central nervous system injuries
J Physiol. 2023 Sep 13. doi: 10.1113/JP284197. Online ahead of print.ABSTRACTAstrocytes are increasingly recognised as partaking in complex homeostatic mechanisms critical for regulating neuronal plasticity following central nervous system (CNS) insults. Ischaemic stroke and traumatic brain injury are associated with high rates of disability and mortality. Depending on the context and type of injury, reactive astrocytes respond with diverse morphological, proliferative and functional changes collectively known as astrogliosis, which results in both pathogenic and protective effects. There is a large body of research on the...
Source: The Journal of Physiology - September 13, 2023 Category: Physiology Authors: Qasim M Alhadidi Ghaith A Bahader Oiva Arvola Philip Kitchen Zahoor A Shah Mootaz M Salman Source Type: research

Evidence of synergy coordination patterns of upper-limb motor control in stroke patients with mild and moderate impairment
Conclusion: This study concludes that stroke shows more synergy variability compared to the healthy group and the alterations of muscle synergies can be described as a combination of reference synergies by four synergy coordination patterns. These findings deepen the understanding of the underlying neurophysiological mechanisms and possible motor control strategies adopted by the CNS in post-stroke patients.
Source: Frontiers in Physiology - September 11, 2023 Category: Physiology Source Type: research

Quantification of cardiac pumping mechanics in TAVI patients: A pilot study utilizing minimally invasive method for pressure ‐volume analysis
Reconstructed pressure volume loop by LV pressure and cardiac output. AbstractThe ventriculo-arterial coupling (VAC) and left ventricle (LV) mechanics are crucial and play an important role in the pathophysiology of aortic stenosis (AS). The pressure-volume (PV) analysis is a powerful tool to study VAC and LV mechanics. We proposed a novel minimally-invasive method for PV analysis in patients with severe AS receiving transcatheter aortic valve implantation (TAVI). Patients with severe AS were prospectively enrolled in a single center. LV pressure and cardiac output were recorded before and after TAVI. We constructed the PV...
Source: Physiological Reports - September 9, 2023 Category: Physiology Authors: Tsung ‐Yu Ko, Chia‐Chuan Chuang, Mao‐Shin Lin, Yi‐Chang Chen, Ying‐Hsien Chen, Ching‐Chang Huang, Chih‐Fan Yeh, Ming‐Jiuh Wang, Kuo‐Chu Chang, Yi‐Lwun Ho, Hsien‐Li Kao Tags: ORIGINAL ARTICLE Source Type: research

Volume responsiveness revisited: an observational multicentre study of continuous versus binary outcomes combining echocardiography and venous return physiology
In conclusion, venous return physiology may enhance echocardiographic assessments of volume responsiveness, that should be based on continuous changes in stroke volume.PMID:37682234 | DOI:10.1152/ajpheart.00375.2023
Source: American Journal of Physiology. Heart and Circulatory Physiology - September 8, 2023 Category: Physiology Authors: Anders Aneman Luis Schulz Gwena ël Prat Michel Slama Philippe Vignon Antoine Vieillard-Baron Source Type: research

Temporal complexity in photoplethysmography and its influence on blood pressure
Conclusion: Temporal complexity patterns are essential to single-site PPG-based BP estimation. Understanding the physiological implications of these patterns can aid in the development of algorithms with clear interpretability and optimal structures.
Source: Frontiers in Physiology - August 31, 2023 Category: Physiology Source Type: research

Validity and reliability of a commercial wearable sensor system for measuring spatiotemporal gait parameters in a post-stroke population: the effects of walking speed and asymmetry
This study supports the general use of Opal wearable sensors to obtain quantitative meas ures of post-stroke gait impairment. These measures should be interpreted cautiously for individuals with moderate-severe asymmetry or walking speeds slower than 0.80 m s−1.
Source: Physiological Measurement - August 29, 2023 Category: Physiology Authors: Francesco Lanotte, Sung Yul Shin, Megan K O'Brien and Arun Jayaraman Source Type: research

Differential effect of gold nanoparticles on cerebrovascular function and biomechanical properties
This study provides the first evidence that GNPs affect the structure and function of the cerebrovasculature, which may be important for their development and use in biomedical applications.
Source: Physiological Reports - August 22, 2023 Category: Physiology Authors: Ryan D. Hunt, Omid Sedighi, Wayne M. Clark, Amber L. Doiron, Marilyn  J. Cipolla Tags: ORIGINAL ARTICLE Source Type: research

Stroke-GAN Painter: Learning to paint artworks using stroke-style generative adversarial networks
AbstractIt is a challenging task to teach machines to paint like human artists in a stroke-by-stroke fashion. Despite advances in stroke-based image rendering and deep learning-based image rendering, existing painting methods have limitations: they (i) lack flexibility to choose different art-style strokes, (ii) lose content details of images, and (iii) generate few artistic styles for paintings. In this paper, we propose a stroke-style generative adversarial network, called Stroke-GAN, to solve the first two limitations. Stroke-GAN learns styles of strokes from different stroke-style datasets, so can produce diverse strok...
Source: European Journal of Applied Physiology - August 17, 2023 Category: Physiology Source Type: research