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Keywords: Work loop
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Journal Articles
Journal Articles
J Exp Biol jeb.248051.
Published: 4 October 2024
...Roger W. P. Kissane; Graham N. Askew The work loop technique was developed to assess muscle performance during cyclical length changes with phasic activation, simulating the in vivo conditions of many muscles, particularly during locomotion. To estimate muscle function in vivo , the standard...
Journal Articles
J Exp Biol (2024) 227 (18): jeb249238.
Published: 19 September 2024
... work. Through a combination of X-ray reconstruction of moving morphology (XROMM), electromyography and fluoromicrometry, we characterised the 3D kinematics of the jaw and digastric muscle during feeding in rabbits. Subsequently, the work loop technique was used to simulate in vivo muscle behaviour...
Includes: Supplementary data
Journal Articles
Journal Articles
J Exp Biol (2023) 226 (13): jeb244721.
Published: 13 July 2023
...Nicole Rice; Caitlin M. Bemis; Monica A. Daley; Kiisa Nishikawa ABSTRACT The work loop technique has provided key insights into in vivo muscle work and power during steady locomotion. However, for many animals and muscles, ex vivo experiments are not feasible. In addition, purely sinusoidal strain...
Journal Articles
J Exp Biol (2022) 225 (9): jeb243285.
Published: 11 May 2022
...Sharn P. Shelley; Rob S. James; Steven J. Eustace; Emma Eyre; Jason Tallis ABSTRACT This study examined the effect of stimulation frequency (140, 200, 230 and 260 Hz) on isometric force, work loop (WL) power and the fatigue resistance of extensor digitorum longus (EDL) muscle ( n =32), isolated...
Includes: Supplementary data
Journal Articles
Journal Articles
J Exp Biol (2020) 223 (21): jeb225839.
Published: 12 November 2020
... amplitude over frequency may instead derive from limitations of muscle physiology at high frequency. We tested this hypothesis by developing a novel in situ work loop approach to measure muscle force and power output from the whole pectoralis major of zebra finches. This method allowed for multiple...
Includes: Supplementary data
Journal Articles
J Exp Biol (2020) 223 (1): jeb199018.
Published: 6 January 2020
... strain perturbations is history dependent, but is captured by a viscoelastic model with memory; the data and model show that the muscle perturbation response depends on locomotor frequency. Muscle Work loop Force Running Cockroach Viscoelastic Muscle produces, dissipates, stores...
Journal Articles
Journal Articles
Journal Articles
J Exp Biol (2016) 219 (2): 183–188.
Published: 1 January 2016
... in vivo . Robert Josephson incorporated lengthening contractions into a work loop analysis that shifted the focus to dynamic muscle function, varying force, length and work done both by and on muscle during a single muscle work cycle. It became apparent that muscle is both a force generator and a spring...
Journal Articles
Journal Articles
J Exp Biol (2015) 218 (19): 3150–3159.
Published: 1 October 2015
... elements (CEs) within a compliant muscle–tendon unit (MTU), we used a novel work loop approach that included implanted sonomicrometry crystals along muscle fascicles. This enabled us to decouple CE and SEE length trajectories when cyclic strain patterns were applied to an isolated plantaris MTU from...
Journal Articles
Journal Articles
Journal Articles
J Exp Biol (2012) 215 (2): 324–330.
Published: 15 January 2012
... (C,D) and heat (E,F) traces and work loops (G,H) for mouse soleus muscles subjected to Saw25% (A,C,E,G) and Saw50% (B,D,F,H) cycles at 5 Hz. The dashed lines highlight the end of shortening. Fig. 4. Example strain (A,B), stress (C,D) and heat (E,F) traces and work loops (G,H) for mouse soleus...
Journal Articles
J Exp Biol (2008) 211 (10): 1603–1611.
Published: 15 May 2008
... and power production were measured in isolated bundles of red fibres from 0.5 L by the work loop technique. Power was maximal at 3–4 Hz and fell to less than 50% of maximum after 6 Hz. Based on the timing of activation, muscle strain, tail beat frequencies and forces in the caudal tendon while swimming, we...
Journal Articles
Journal Articles