Results 111 to 120 of about 79,406 (256)

Isometric training at longer muscle–tendon complex lengths: A potential countermeasure to impaired neuro‐muscle–tendon function during space travel

Experimental Physiology, EarlyView.
Abstract Manned space exploration to distant destinations, including Mars, continues to be an aspiration of humankind. Space travel does, however, present many challenges to the body, amongst which adaptation to microgravity is perhaps the largest. For instance, both short and long manned spaceflight missions have shown substantial deleterious effects ...
Gerard McMahon, Andy Sanderson, Hans Degens   +2 more
wiley   +1 more source

Modeling Catecholaminergic Polymorphic Ventricular Tachycardia using Induced Pluripotent Stem Cell-derived Cardiomyocytes

Rambam Maimonides Medical Journal, 2012
Catecholaminergic polymorphic ventricular tachycardia (CPVT) is an inherited arrhythmogenic cardiac disorder characterized by life-threatening arrhythmias induced by physical or emotional stress, in the absence structural heart abnormalities.
Atara Novak, Avraham Lorber, Joseph Itskovitz-Eldor, Ofer Binah   +3 more
doaj   +1 more source

Passive thigh heating improves peak force production in younger adults and early isokinetic force production in younger and older adults

Experimental Physiology, EarlyView.
Abstract Older adults often suffer from reduced physical capability relative to young adults, in part due to impaired muscle function. This study investigated the ergogenic effects of passive thigh heating on knee extensor torque production in healthy older versus younger adults.
Desmond Denny, Daniel C. Low, Oliver R. Gibson   +2 more
wiley   +1 more source

Changes in motor unit conduction velocity after unilateral lower‐limb suspension and active recovery are correlated with muscle ion channel gene expression

Experimental Physiology, EarlyView.
Abstract The effects of muscle disuse on the propagation of action potentials along motor unit (MU) muscle fibres, a key process for effective muscle activation and force generation, remain poorly understood. The aim of this study was to investigate changes in action potential propagation and to identify biological factors influencing these changes ...
Giacomo Valli, Fabio Sarto, Francesco Negro, Elena Monti, Giuseppe Sirago, Matteo Paganini, Sandra Zampieri, Martino V. Franchi, Andrea Casolo, Julián Candia, Luigi Ferrucci, Marco V. Narici, Giuseppe De Vito   +12 more
wiley   +1 more source

A computational model of spatio-temporal cardiac intracellular calcium handling with realistic structure and spatial flux distribution from sarcoplasmic reticulum and t-tubule reconstructions.

PLoS Computational Biology, 2017
Intracellular calcium cycling is a vital component of cardiac excitation-contraction coupling. The key structures responsible for controlling calcium dynamics are the cell membrane (comprising the surface sarcolemma and transverse-tubules), the ...
Michael A Colman, Christian Pinali, Andrew W Trafford, Henggui Zhang, Ashraf Kitmitto   +4 more
doaj   +1 more source

Effect of hypokinesia on contractile function of cardiac muscle [PDF]

Rats were subjected to hypokinesia for two months and the contractile function of isolated papillary muscle was studied. Hypokinesia reduced significantly the isotonic contraction rate which depended on the ATPase activity of the myofibrils; it also ...
Gorina, M. S., Kapelko, V. I., Meyerson, F. Z., Trikhpoyeva, A. M.   +3 more
core   +1 more source

The efficacy and physiological bases of small muscle mass exercise in health and disease

Experimental Physiology, EarlyView.
Abstract The conventional approach to aerobic exercise prescription involves large muscle mass exercise and the manipulation of variables such as training intensity, duration and frequency to promote desired adaptations. However, during whole‐body exercise, central limitations (i.e., neural, pulmonary and/or cardiac) constrain exercise tolerance and ...
Callum G. Brownstein
wiley   +1 more source

Safety and long-term efficacy of AAV1.SERCA2a using nebulizer delivery in a pig model of pulmonary hypertension

Pulmonary Circulation, 2018
Nebulization delivery of adeno-associated virus serotype 1 encoding sarcoplasmic reticulum Ca 2+ -ATPase2a (AAV1.SERCA2a) gene was examined in a Yukatan miniature swine model of chronic pulmonary hypertension (n = 13).
Shin Watanabe, Kiyotake Ishikawa, Maria Plataki, Olympia Bikou, Erik Kohlbrenner, Jaume Aguero, Lahouaria Hadri, Iratxe Zarragoikoetxea, Kenneth Fish, Jane A. Leopold, Roger J. Hajjar   +10 more
doaj   +1 more source

AKAP6 and phospholamban colocalize and interact in HEK‐293T cells and primary murine cardiomyocytes

Physiological Reports, 2019
Phospholamban (PLN) is an important Ca2+ modulator at the sarcoplasmic reticulum (SR) of striated muscles. It physically interacts and inhibits sarcoplasmic reticulum Ca2+ ATPase (SERCA2) function, whereas a protein kinase A (PKA)‐dependent ...
Farigol Hakem Zadeh, Allen C. T. Teng, Uros Kuzmanov, Paige J. Chambers, Allan R. Tupling, Anthony O. Gramolini   +5 more
doaj   +1 more source

Lifestyle modification in atrial fibrillation: Mechanisms, phenotypes and ablation outcomes

Experimental Physiology, EarlyView.
Abstract Atrial fibrillation (AF) is the most prevalent sustained cardiac arrhythmia and is associated with significant morbidity, mortality and healthcare utilization. Catheter ablation is increasingly used as a rhythm‐control intervention for patients with symptomatic paroxysmal and persistent AF, yet recurrence rates remain suboptimal.
Konstantinos Grigoriou, Paschalis Karakasis, Panagiotis Theofilis, Konstantinos Pamporis, Panayotis K. Vlachakis, Anastasios Apostolos, Nikolaos Ktenopoulos, Barbara Fyntanidou, Efstratios Karagiannidis, Dimitrios Patoulias, Antonios P Antoniadis, Nikolaos Fragakis   +11 more
wiley   +1 more source