Results 31 to 40 of about 489,683 (360)

The efficiency of muscle contraction

open access: yesProgress in Biophysics and Molecular Biology, 2005
When a muscle contracts and shortens against a load, it performs work. The performance of work is fuelled by the expenditure of metabolic energy, more properly quantified as enthalpy (i.e., heat plus work). The ratio of work performed to enthalpy produced provides one measure of efficiency.
Smith, Nicholas P.   +2 more
openaire   +5 more sources

Monitoring muscle fatigue following continuous load changes [PDF]

open access: yes, 2020
Department of Human Factors EngineeringPrevious studies related to monitoring muscle fatigue during dynamic motion have focused on detecting the accumulation of muscle fatigue.
Yoon, Woojin
core  

Calcium and muscle contraction

open access: bronzeProgress in Biophysics and Molecular Biology, 1968
S Ebashi, Makoto Endo
openalex   +4 more sources

Three-dimensional geometrical changes of the human tibialis anterior muscle and its central aponeurosis measured with three-dimensional ultrasound during isometric contractions [PDF]

open access: yesPeerJ, 2016
Background. Muscles not only shorten during contraction to perform mechanical work, but they also bulge radially because of the isovolumetric constraint on muscle fibres.
Brent J. Raiteri   +2 more
doaj   +2 more sources

The coagulation of myosin in muscle [PDF]

open access: yes, 1937
The coagulation of myosin is one of the few changes in the proteins of muscle known to take place during contraction and rigor. Although under certain conditions as much as one-third of the total protein of muscle may become insoluble, the significance ...
Mirsky, A. E.
core   +2 more sources

How much dystrophin is enough: the physiological consequences of different levels of dystrophin in the mdx mouse [PDF]

open access: yes, 2015
Splice modulation therapy has shown great clinical promise in Duchenne muscular dystrophy, resulting in the production of dystrophin protein. Despite this, the relationship between restoring dystrophin to established dystrophic muscle and its ability to ...
Betts, C   +13 more
core   +1 more source

Structure of the Inhibited Smooth Muscle Myosin and Its Implications on the Regulation of Insect Striated Muscle Myosin

open access: yesLife
Class II myosin (myosin-2) is an actin-based motor protein found in nearly all eukaryotes. One critical question is how the motor function of myosin-2 is regulated. Vertebrate myosin-2 comprises non-muscle myosin, smooth muscle myosin and striated muscle
Shaopeng Sun, Yi-Ning Lu, Xiang-dong Li
doaj   +1 more source

Dynamics of PO2 and VO2 in resting and contracting rat spinotrapezius muscle

open access: yesFrontiers in Physiology, 2023
This study examined changes in interstitial PO2, which allowed calculation of VO2 during periods of rest, muscle contraction and recovery using an in situ rat spinotrapezius muscle preparation.
Aleksander S. Golub   +6 more
doaj   +1 more source

Dynamic muscle quality of the plantar flexors is impaired in claudicant patients with peripheral arterial disease and associated with poorer walking endurance [PDF]

open access: yes, 2015
Objective Peripheral arterial disease and intermittent claudication (PAD-IC) negatively affects physical activity and function. There is evidence for plantarflexor muscle dysfunction and weakness; however, the extent to which this dysfunction can be ...
King, Stephanie   +2 more
core   +1 more source

Identification of a third myosin-5a-melanophilin interaction that mediates the association of myosin-5a with melanosomes

open access: yeseLife
Transport and localization of melanosome at the periphery region of melanocyte are depended on myosin-5a (Myo5a), which associates with melanosome by interacting with its adaptor protein melanophilin (Mlph).
Jiabin Pan   +7 more
doaj   +1 more source

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