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Keywords: Gastrocnemius
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Journal Articles
J Exp Biol jeb.242694.
Published: 15 September 2021
... prevented growing guinea fowl ( Numida Meleagris ) from jumping. At maturity, we compared the jump performance of our treatment group to that of controls and measured the morphology of the gastrocnemius elastic system. We found that restricted birds jumped with lower jump power and work, yet there were...
Journal Articles
J Exp Biol (2019) 222 (24): jeb205559.
Published: 18 December 2019
... hindlimb muscles (medial gastrocnemius and plantaris) across a range of gait (walk, trot and gallop) and grade (level and incline) conditions. We use these data to explore how the pattern of force production, muscle activation and muscle length changes across conditions in a small quadrupedal mammal...
Includes: Supplementary data
Journal Articles
J Exp Biol (2019) 222 (4): jeb187815.
Published: 27 February 2019
... had 17% longer r than RFS runners, but all runners had similarly sized medial and lateral gastrocnemius (MG and LG) muscles. Because muscle size also depends on activation pattern ( Ahn et al., 2011 ), we compared MG:LG activation bias during walking in 24 runners and 23 sedentary subjects. Half...
Journal Articles
J Exp Biol (2018) 221 (15): jeb175794.
Published: 01 August 2018
... understanding of the underlying structural mechanisms that have functional implications. The medial and lateral gastrocnemius muscles from 12 subjects were imaged during plantarflexion movements on a dynamometer. The muscle belly was simultaneously scanned from two orthogonal directions using two ultrasound...
Journal Articles
J Exp Biol (2017) 220 (9): 1634–1642.
Published: 01 May 2017
... during contraction from the resting condition were assumed to be proportional to the longitudinal elongations within those regions (Poisson's ratio). Rather than tendon regions of smallest CSA undergoing the greatest deformations, the outcome was region specific, with the proximal (gastrocnemius) tendon...
Journal Articles
J Exp Biol (2016) 219 (4): 470–473.
Published: 15 February 2016
... aerobic metabolism (A) and unselected, control lines (C). We investigated putative adaptations that result in the increased performance of the hindlimb muscle (gastrocnemius joined with plantaris). The body mass-adjusted muscle mass was higher in A-lines (0.093 g) than in C-lines (0.083 g; P =0.01...
Includes: Supplementary data
Journal Articles
J Exp Biol (2015) 218 (18): 2935–2941.
Published: 01 September 2015
...Chris Tijs; Jaap H. van Dieën; Huub Maas ABSTRACT Triceps surae muscles are mechanically connected by the shared Achilles tendon and by epimuscular myofascial connections. We aimed to assess the effects of proximal lengthening of gastrocnemius and plantaris muscles, imposed by changes in knee angle...
Journal Articles
J Exp Biol (2015) 218 (3): 451–457.
Published: 01 February 2015
... experimentally investigated the contributions of visual perception (visual feedback), proprioceptive feedback and feed-forward patterns to the muscle activity responsible for these adaptations. The activity of three bilateral lower limb muscles (m. gastrocnemius medialis, m. tibialis anterior and m. vastus...
Journal Articles
J Exp Biol (2014) 217 (6): 896–907.
Published: 15 March 2014
... Reciprocal inhibition Electromyography Restraint Tibialis anterior Gastrocnemius Chicks are precocious walkers. Within hours of hatching they can be trained to walk down darkened corridors ( Sindhurakar and Bradley, 2010 ) and to negotiate dynamic postural challenges ( Rácz et al., 2011...
Journal Articles
J Exp Biol (2013) 216 (4): 594–600.
Published: 15 February 2013
... transverse strain triceps surae gastrocnemius elastic The human Achilles tendon (AT) exhibits elastic properties and acts in series with the triceps surae muscle group that acts to plantar-flex the ankle. The AT’s elasticity allows it to store and return elastic energy during locomotion ( Ishikawa...
Journal Articles
J Exp Biol (2012) 215 (21): 3711–3722.
Published: 01 November 2012
.... ( 1982a ). Anatomy and innervation patterns of cat lateral gastrocnemius and plantaris muscles . Am. J. Anat.   164 , 67 - 77 . English   A. W. , Letbetter   W. D. ( 1982b ). A histochemical analysis of identified compartments of cat lateral gastrocnemius muscle . Anat. Rec.   204 , 123...
Journal Articles
J Exp Biol (2011) 214 (9): 1523–1532.
Published: 01 May 2011
... that regulates the actin–myosin interaction during contraction and modulates force output. In response to normal growth and experimental body weight increases, alternative splicing of Tnnt3 in rat gastrocnemius muscle was adjusted in a quantitative fashion. The response depended on weight per se, as externally...
Includes: Supplementary data
Journal Articles
J Exp Biol (2007) 210 (23): 4159–4168.
Published: 01 December 2007
... gastrocnemius muscle–tendon units from measures of ankle stiffness obtained at a range of knee angles. Passive length–tension curves of the muscle–tendon unit were then combined with ultrasonographic measures of muscle fascicle length and pennation to determine passive length–tension curves of the muscle...
Journal Articles
J Exp Biol (2003) 206 (17): 2941–2958.
Published: 01 September 2003
... fowl Numida meleagris lateral gastrocnemius (LG) and digital flexor-IV (DF-IV), during level and incline locomotion. During level locomotion, the LG and DF-IV exhibit differing muscle fascicle strain patterns: the LG shortens by 10-15% while developing force,whereas the DF-IV undergoes a stretch...