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Linking cortex and contraction —Integrating models along the corticomuscular pathway
Computational models of the neuromusculoskeletal system provide a deterministic approach to investigate input-output relationships in the human motor system. Neuromusculoskeletal models are typically used to estimate muscle activations and forces that are consistent with observed motion under healthy and pathological conditions. However, many movement pathologies originate in the brain, including stroke, cerebral palsy, and Parkinson’s disease, while most neuromusculoskeletal models deal exclusively with the peripheral nervous system and do not incorporate models of the motor cortex, cerebellum, or spinal cord. An integr...
Source: Frontiers in Physiology - May 10, 2023 Category: Physiology Source Type: research

Periodontitis Is Associated With Heart Failure: A Population-Based Study (NHANES III)
Conclusion: According to data from this nationally representative sample from the United States, periodontitis is associated with an increased risk of heart failure.
Source: Frontiers in Physiology - April 20, 2022 Category: Physiology Source Type: research

Periodontal Disease Is Associated With Increased Risk of Hypertension: A Cross-Sectional Study
Conclusion: Periodontal disease is significantly and positively correlated with increased risk of hypertension in Chinese population, and exact mechanisms of this association should be explored in future. Introduction Periodontal disease is a complex polymicrobial inflammation, including gingivitis and periodontitis. According to the 2015 Global Burden of Disease (GBD) study, the prevalence of severe chronic periodontitis in 2015 has reached 616 million (Kassebaum et al., 2017). In China, the periodontal disease standardized DALYs rate has risen from 24.7 in 1990 to 25.7 in 2013 according to the data from 2013 GBD ...
Source: Frontiers in Physiology - April 24, 2019 Category: Physiology Source Type: research

A Genetic Variant of miR-34a Contributes to Susceptibility of Ischemic Stroke Among Chinese Population
This study was supported by National Natural Science Foundation of China (Nos. 81560552, 81260234), Natural Science Foundation of Guangxi Zhuang Autonomous Region (CN) (2017JJA180826), Innovation Project of Guangxi Graduate Education (CN) (201601009) and Key Laboratory Open Project Fund of Guangxi Zhuang Autonomous Region (CN) (kfkt20160064). Conflict of Interest Statement The authors declare that the research was conducted in the absence of any commercial or financial relationships that could be construed as a potential conflict of interest. Supplementary Material The Supplementary Material for this article can be fou...
Source: Frontiers in Physiology - April 23, 2019 Category: Physiology Source Type: research

Atrial Transcriptional Profiles of Molecular Targets Mediating Electrophysiological Function in Aging and Pgc-1 β Deficient Murine Hearts
Conclusion: These findings limit the possible roles of gene transcriptional changes in previously reported age-dependent pro-arrhythmic electrophysiologial changes observed in Pgc-1β-/- atria to an altered Ca2+-ATPase (Atp2a2) expression. This directly parallels previously reported arrhythmic mechanism associated with p21-activated kinase type 1 deficiency. This could add to contributions from the direct physiological outcomes of mitochondrial dysfunction, whether through reactive oxygen species (ROS) production or altered Ca2+ homeostasis. Introduction Atrial arrhythmias constitute a major public health pro...
Source: Frontiers in Physiology - April 23, 2019 Category: Physiology Source Type: research

Repeated Changes to the Gravitational Field Negatively Affect the Serum Concentration of Select Growth Factors and Cytokines
This study was carried out in accordance with the recommendations of the ethical committee of the Ruhr-Universität Bochum with written informed consent from all subjects. All subjects gave written informed consent in accordance with the Declaration of Helsinki. The protocol was approved by the ethical committee of the Ruhr-Universität Bochum (Register-Number 5158–14). Author Contributions US, FS, LG, and AK performed the experiments. US and TR analyzed the data, created the figures, and drafted the manuscript. TW, FS, and NB designed the study. All authors revised the manuscript and approved its fina...
Source: Frontiers in Physiology - April 16, 2019 Category: Physiology Source Type: research

Carotid {beta}-stiffness index is associated with slower processing speed but not working memory or white matter integrity in healthy middle-aged/older adults
This study adds to the field by demonstrating that the age-related increases in carotid artery stiffness, but not aortic stiffness, is independently and selectively associated with slower processing speed but not working memory among middle-aged/older adults with low cardiovascular disease risk factor burden.
Source: Journal of Applied Physiology - April 5, 2017 Category: Physiology Authors: DuBose, L. E., Voss, M. W., Weng, T. B., Kent, J. D., Dubishar, K. M., Lane-Cordova, A., Sigurdsson, G., Schmid, P., Barlow, P. B., Pierce, G. L. Tags: RESEARCH ARTICLE Source Type: research

Using stimulation of the diving reflex in humans to teach integrative physiology.
Abstract During underwater submersion, the body responds by conserving O2 and prioritizing blood flow to the brain and heart. These physiological adjustments, which involve the nervous, cardiovascular, and respiratory systems, are known as the diving response and provide an ideal example of integrative physiology. The diving reflex can be stimulated in the practical laboratory setting using breath holding and facial immersion in water. Our undergraduate physiology students complete a laboratory class in which they investigate the effects of stimulating the diving reflex on cardiovascular variables, which are recor...
Source: Advances in Physiology Education - December 1, 2014 Category: Physiology Authors: Choate JK, Denton KM, Evans RG, Hodgson Y Tags: Adv Physiol Educ Source Type: research

Genes count: attenuated cerebral vasodilator capacity in young African Americans
Compared to Caucasian Americans, African Americans present increased risk of cerebrovascular events such as stroke (Roger et al. 2011), even after controlling for age, insulin dependent diabetes, hypercholesterolemia, and education (Sacco et al. 1995). The mechanisms explaining this increased prevalence of cerebral vascular disease in African Americans therefore remain elusive, though African Americans do demonstrate impaired endothelial function of systemic conductance arteries (Perregaux et al. 2000). If similar dysfunction exists in the cerebral circulation of African Americans it could impair cerebral blood flow reg...
Source: Experimental Physiology - November 7, 2014 Category: Physiology Authors: Michael J. White Tags: Viewpoint Source Type: research