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Keywords: Muscle
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Journal Articles
J Exp Biol (2024) 227 (8): jeb247042.
Published: 22 April 2024
... prey (30–37% body mass), all Boa constrictor tested could perform rectilinear locomotion in the region with the food bolus despite a greatly increased distance between the ribs and the ventral skin that likely lengthens muscles relevant to propulsion. Unexpectedly, out of 11 kinematic variables, only...
Includes: Supplementary data
Journal Articles
J Exp Biol (2023) 226 (19): jeb245805.
Published: 12 October 2023
...Elizabeth Mendoza; Maya Martinez; Jeffrey P. Olberding; Emanuel Azizi ABSTRACT Changes in temperature alter muscle kinetics and in turn affect whole-organism performance. Some organisms use the elastic recoil of biological springs, structures which are far less temperature sensitive, to power...
Journal Articles
J Exp Biol (2023) 226 (14): jeb244863.
Published: 27 July 2023
... an imposed displacement and the torque generated in response. Ankle impedance in the sagittal plane depends strongly on the triceps surae and Achilles tendon, but their relative contributions remain unknown. It is commonly assumed that ankle impedance is controlled by changing muscle activation and, thereby...
Journal Articles
J Exp Biol (2023) 226 (10): jeb245113.
Published: 18 May 2023
...Nikolaos Papachatzis; Samuel F. Ray; Kota Z. Takahashi ABSTRACT Foot structures define the leverage in which the ankle muscles push off against the ground during locomotion. While prior studies have indicated that inter-individual variation in anthropometry (e.g. heel and hallux lengths) can...
Includes: Supplementary data
Journal Articles
JEB: 100 years of discovery
J Exp Biol (2023) 226 (Suppl_1): jeb245132.
Published: 22 February 2023
... for the study of tetrapod locomotor biomechanics have matured in recent decades. Here, we summarise their progress, relevance and potential. Animation Bone Dynamics Gait Muscle Optimization Horizon 2020 http://dx.doi.org/10.13039/100010661 695517 The Royal Veterinary College...
Journal Articles
JEB: 100 years of discovery
J Exp Biol (2023) 226 (Suppl_1): jeb245109.
Published: 13 February 2023
... and behaviour. More specifically, in light of current literature, this Review focuses on evaluating the acute and chronic effects of temperature on the mechanical function of muscle tissues. For ectotherms, maximal muscle performance typically occurs at temperatures approximating the natural environment...
Journal Articles
J Exp Biol (2022) 225 (15): jeb243646.
Published: 9 August 2022
... between individuals within species and across species. Differences in morphology affect COT, but the physiological mechanisms underlying variation in COT remain unresolved. Candidates include mitochondrial efficiency and the efficiency of muscle contraction–relaxation dynamics. Animals can offset...
Journal Articles
Journal Articles
J Exp Biol (2022) 225 (Suppl_1): jeb243351.
Published: 8 March 2022
... and contract muscle, sometimes at the expense of other activities or expression of traits. Nevertheless, convergent pathways have also evolved to deal with critical trade-offs that are necessary to survive ubiquitous environmental challenges. We discuss how whole-animal performance traits, such as locomotion...
Journal Articles
J Exp Biol (2022) 225 (4): jeb243572.
Published: 21 February 2022
... and resistance to oxidative stress during fasting. However, the cellular mechanisms that regulate these adaptations are still not fully understood. To examine how metabolic coordination is achieved during prolonged fasting, we profiled changes in blubber, skeletal muscle and plasma proteomes of adult female NES...
Includes: Supplementary data
Journal Articles
J Exp Biol (2022) 225 (1): jeb242567.
Published: 6 January 2022
...Ignacio Simó; Mariano Faggiani; Daniel A. Fernandez; Andrés A. Sciara; Silvia E. Arranz ABSTRACT This study evaluates white muscle growth and in vivo cell proliferation during a fasting and refeeding trial, using pejerrey ( Odontesthes bonariensis ) as animal model, in order to better understand...
Includes: Supplementary data
Journal Articles
J Exp Biol (2021) 224 (21): jeb243075.
Published: 4 November 2021
...Christopher J. Mayerl; Kendall E. Steer; Almasi M. Chava; Laura E. Bond; Chloe E. Edmonds; Francois D. H. Gould; Tobin L. Hieronymous; Christopher J. Vinyard; Rebecca Z. German ABSTRACT The function of a muscle is impacted by its line of action, activity timing and contractile characteristics when...
Includes: Supplementary data
Journal Articles
J Exp Biol (2021) 224 (21): jeb242698.
Published: 4 November 2021
...David S. Brooks; Kumar Vishal; Simranjot Bawa; Adrienne Alder; Erika R. Geisbrecht ABSTRACT Muscle atrophy, or a decline in muscle protein mass, is a significant problem in the aging population and in numerous disease states. Unraveling molecular signals that trigger and promote atrophy may lead...
Includes: Supplementary data
Journal Articles
J Exp Biol (2021) 224 (11): jeb217463.
Published: 8 June 2021
..., 1974 ; Dagg, 1973 ; Garland, 1983 ). Yet it is unclear whether bone strength can explain why rhinos are so athletic even at ∼3000 kg, or whether bone strength is a side effect of other adaptations that are more closely linked to maximal speed capacity, such as muscle or tendon strength. Intriguingly...
Includes: Supplementary data
Journal Articles
J Exp Biol (2021) 224 (1): jeb228973.
Published: 4 January 2021
... of elevating tissue temperature to increase the rate of chemical processes. Yet, movement performance that is robust to changes in body temperature has been observed in numerous species. This thermally robust performance appears exceptional in light of the well-documented effects of temperature on muscle...
Journal Articles
J Exp Biol (2020) 223 (24): jeb236109.
Published: 21 December 2020
..., showed altered migratory behaviour (daily activity and Zugunruhe onset), and enhanced muscle growth and plasma testosterone levels, but showed no effect on testis growth. Temperature was perceived at both peripheral and central levels, and affected multiple molecular drivers culminating...
Includes: Supplementary data
Journal Articles
J Exp Biol (2020) 223 (17): jeb227736.
Published: 11 September 2020
... Metabolism Muscle Oxygen stores Pinniped Sonar The lifestyles of marine mammals, and the habitats in which they reside, are diverse, resulting in a range of diving capabilities as measured by maximal achieved dive depth or duration. For example, Pacific white-sided dolphins ( Lagenorhynchus...
Journal Articles
J Exp Biol (2020) 223 (15): jeb218776.
Published: 13 August 2020
...Jackey Chen; Parastoo Mashouri; Stephanie Fontyn; Mikella Valvano; Shakeap Elliott-Mohamed; Alex M. Noonan; Stephen H. M. Brown; Geoffrey A. Power ABSTRACT The increase or decrease in isometric force following active muscle lengthening or shortening, relative to a reference isometric contraction...
Journal Articles
J Exp Biol (2020) 223 (14): jeb218370.
Published: 27 July 2020
... from the limb flexors; however, skeletal muscle mass of sloths is reduced compared with other arboreal mammals. Although suspensory locomotion demands that muscles are active to counteract the pull of gravity, it is possible that sloths minimize muscle activation and/or selectively recruit slow motor...
Includes: Supplementary data
Journal Articles
J Exp Biol (2020) 223 (1): jeb199018.
Published: 6 January 2020
...Thomas Libby; Chidinma Chukwueke; Simon Sponberg ABSTRACT Muscle mediates movement but movement is typically unsteady and perturbed. Muscle is known to behave non-linearly and with history-dependent properties during steady locomotion, but the importance of history dependence in mediating muscle...