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Keywords: skeletal muscle
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Journal Articles
J Exp Biol (2022) 225 (12): jeb243730.
Published: 20 June 2022
... behavior even when levels of testosterone are low in the bloodstream. One idea is that select tissues make their own androgens from scratch to support behavioral performance. We first studied this phenomenon in the skeletal muscles that actuate elaborate sociosexual displays in downy woodpeckers and two...
Includes: Supplementary data
Journal Articles
J Exp Biol (2021) 224 (10): jeb242172.
Published: 24 May 2021
... remains unchanged. Passive force Skeletal muscle Rat Laser diffraction Medial gastrocnemius Sarcomerogenesis Ageing Elderly Muscle architecture In old age, there is a loss of muscle mass and alterations to the structural components of the neuromuscular system, impairing contractile...
Journal Articles
J Exp Biol (2021) 224 (2): jeb231639.
Published: 18 January 2021
...Shen-Hui Xu; Wei-Wei Fu; Jie Zhang; Hui-Ping Wang; Kai Dang; Hui Chang; Yun-Fang Gao ABSTRACT We previously showed that different skeletal muscles in Daurian ground squirrels ( Spermophilus dauricus ) possess different antioxidant strategies during hibernation; however, the reason for these varied...
Journal Articles
J Exp Biol (2021) 224 (2): jeb238634.
Published: 15 January 2021
... is less abundant in the skeletal muscles of FVB/N mice than in the C57BL/6J strain. The expression of Ca 2+ transporters in the mitochondrial membranes was also lower in FVB/N than in C57BL/6J mice. Similarly, electron transport chain proteins in the mitochondria were less abundant in FVB/N mice, which...
Journal Articles
J Exp Biol (2020) 223 (22): jeb230896.
Published: 23 November 2020
... anatomical features found in the myodural bridge indicated a shared functional role related to CSF flow, which is a hypothesis supported by the current study. Variations in the dural contact area, angle of skeletal muscle contact and even the contents of epidural space would yield subtle interspecific...
Journal Articles
J Exp Biol (2020) 223 (21): jeb225839.
Published: 12 November 2020
... on the mechanical power output of mouse skeletal muscles . J. Exp. Biol.   200 , 3119 - 3131 . Askew , G. N. and Marsh , R. L. ( 1998 ). Optimal shortening velocity (V/V(max)) of skeletal muscle during cyclical contractions: Length-force effects and velocity-dependent activation and deactivation...
Includes: Supplementary data
Journal Articles
J Exp Biol (2020) 223 (19): jeb224410.
Published: 7 October 2020
... 2020 http://www.biologists.com/user-licence-1-1/ Summary: Adding mass to rat plantaris muscle decreases mechanical work per cycle during cyclic contractions. Cyclic contractions Inertia Muscle mass Muscle mechanics Mechanical work Skeletal muscle The behaviour of whole...
Includes: Supplementary data
Journal Articles
J Exp Biol (2020) 223 (16): jeb228304.
Published: 26 August 2020
... Oxygen cascade Phenotypic plasticity Skeletal muscle Phenotypic plasticity is the ability of an organism with a given genotype to express environmentally mediated alternative phenotypes ( Travis, 1994 ; West-Eberhard, 2003 ). Alternative phenotypes can occur in response to different...
Includes: Supplementary data
Journal Articles
J Exp Biol (2020) 223 (2): jeb197038.
Published: 27 January 2020
... (muscular dystrophy with myositis) soleus muscles. Skeletal muscles from mdm mice have a small deletion in the N2A region of titin and show no increase in titin stiffness during active stretch. We found that: (1) force enhancement and depression were reduced in mdm soleus compared with wild-type muscles...
Journal Articles
J Exp Biol (2019) 222 (23): jeb200832.
Published: 29 November 2019
...Scott Medler ABSTRACT Skeletal muscle fibers are classified according to the myosin heavy chain (MHC) isoforms and other myofibrillar proteins expressed within these cells. In addition to ‘pure’ fibers expressing single MHC isoforms, many fibers are ‘hybrids’ that co-express two or more different...
Includes: Supplementary data
Journal Articles
J Exp Biol (2019) 222 (20): jeb213348.
Published: 24 October 2019
... that terrestrial exercise improves locomotion in amphibious fishes out of water as a result of skeletal muscle remodeling. We compared the jumping performance of Kryptolebias marmoratus before and after an exercise training regimen, and assessed the muscle phenotype of control and exercise-trained fish. We found...
Journal Articles
J Exp Biol (2019) 222 (18): jeb204925.
Published: 23 September 2019
... relative telomere length (RTL) in DNA extracted from liver, heart, skeletal muscle (SM) and BAT of 45 juvenile and adult animals sampled either at mid- or late hibernation. Age did not have a significant effect on RTL in any tissue. At mid-hibernation, RTL of juvenile females was longer in BAT and SM than...
Includes: Supplementary data
Journal Articles
J Exp Biol (2019) 222 (4): jeb196188.
Published: 27 February 2019
..., it was shown that mitochondrial metabolism must decrease by 60–70% before oxidative stress occurs in skeletal muscle. Whether the ROS generation threshold varies between tissues and how it differs in other species or physiological conditions remains to be determined, to better understand the oxidative stress...
Journal Articles
J Exp Biol (2018) 221 (15): jeb180190.
Published: 1 August 2018
.... To study this issue, we examined gene expression profiles in select skeletal muscles that actuate woodpecker drum displays. This remarkable whole-body signal is produced when individuals rapidly hammer their bill against trees. We found that, compared with muscles that play no part in producing...
Includes: Supplementary data
Journal Articles
J Exp Biol (2018) 221 (13): jeb173146.
Published: 4 July 2018
... of the insulin-like growth factor (IGF) system – an endocrine pathway downstream of growth hormone (GH). Skeletal muscle is the main target for growth and energetic storage in fish, yet little is known about how its growth is regulated during an immune response. We addressed this knowledge gap by characterising...
Includes: Supplementary data
Journal Articles
J Exp Biol (2018) 221 (12): jeb177758.
Published: 22 June 2018
... activity during routine swimming. References Acevedo , L. M. and Rivero , J.-L. L. ( 2006 ). New insights into skeletal muscle fibre types in the dog with particular focus towards hybrid myosin phenotypes . Cell Tissue Res.   323 , 283 - 303 . 10.1007/s00441-005-0057-4 Agüera...
Includes: Supplementary data
Journal Articles
J Exp Biol (2018) 221 (10): jeb172478.
Published: 22 May 2018
... in skeletal muscle was not supported by any statistical model ( Fig. 3 A and Table S3 ). However, the subset of HR mice with the mini-muscle phenotype had significantly lower buffering capacity than normal-muscled mice ( Fig. 3 and Table S3 ). The mini-muscle phenotype has been favored (unintentionally...
Includes: Supplementary data
Journal Articles
J Exp Biol (2018) 221 (4): jeb171819.
Published: 19 February 2018
...Oliver Baum; Carole Sollberger; Andrea Raaflaub; Adolfo Odriozola; Gunnar Spohr; Sebastian Frese; Stefan A. Tschanz ABSTRACT To work out which microvascular remodeling processes occur in murine skeletal muscle during endurance exercise, we subjected C57BL/6 mice to voluntary running wheel training...
Journal Articles
J Exp Biol (2017) 220 (24): 4681–4688.
Published: 15 December 2017
...://www.biologists.com/user-licence-1-1/ Summary: We pinpoint the main skeletal muscles associated with the production of an elaborate gestural courtship display in a tropical bird, the golden-collared manakin. Skeletal muscle Electromyography Courtship behavior Social signal Biomechanics Golden...
Journal Articles
J Exp Biol (2017) 220 (17): 3110–3118.
Published: 1 September 2017
...Krysta Powers; Venus Joumaa; Azim Jinha; Eng Kuan Moo; Ian Curtis Smith; Kiisa Nishikawa; Walter Herzog ABSTRACT In actively stretched skeletal muscle sarcomeres, titin-based force is enhanced, increasing the stiffness of active sarcomeres. Titin force enhancement in sarcomeres is vastly reduced...