... unrestricted use, distribution and reproduction in any medium provided that the original work is properly attributed. Summary: The southern alligator lizard jaw muscles are used in mate-holding, and generally have slower contractile properties, yet retain somewhat faster activation kinetics...

... and distal wing muscles would be even more extreme in a temperate bat species that is capable of flight at variable environmental temperatures. We measured the contractile properties of the proximal pectoralis muscle and distal extensor carpi radialis muscle at a range of temperatures in the big brown bat...

... © 2014. Published by The Company of Biologists Ltd 2014 Feeding Tongue projection Electromyography Contractile properties Temperature effects Elastic The effect of temperature on movements powered by the recoil of elastic elements has been shown to be lower than the effect...

... and tongue projection was significantly affected by temperature ( Q 10 of 2.56), as were dynamic contractile properties of the tongue projector and retractor muscles ( Q 10 of 1.48–5.72), supporting our hypothesis that contractile rates slow with decreasing temperature and, as a result, activity durations...

...Jeanine M. Donley; Robert E. Shadwick; Chugey A. Sepulveda; Douglas A. Syme The work loop technique was used to examine contractile properties of the red aerobic locomotor muscle (RM) in the ectothermic leopard shark Triakis semifasciata and endothermic shortfin mako shark Isurus oxyrinchus...

... contractile properties and locomotor performance. In this study, we aimed to investigate the effect of aestivation on iliofibularis and sartorius muscle morphology and contractile function of C. alboguttata over a longer, more ecologically relevant time-frame of 9 months. We found that whole muscle mass...

... invertebrate groups seems to be coupled to the need to generate tension over large changes in muscle length and might be a more general solution for this problem. supercontraction lizard transmission electron microscopy contractile properties muscle Muscle mechanics, based on the sliding...

...) and extensor carpi radialis (ECR)] by testing their isometric contractile properties. One muscle that is not dimorphic, the extensor carpi ulnaris (ECU), was also studied as a control. In addition to being greater in wet mass and in cross-sectional area in the males, our data show that the dimorphic muscles...

... running. These muscles are hypothesized to play a key role in stability. * e-mail: [email protected] 16 08 1999 16 11 1999 © 1999 by Company of Biologists 1999 contractile properties power output work loop jumping running stability velocity-dependent activation...

... 1999 work loop external oblique muscle frequency sawtooth length trajectory power output vocalization force–velocity twitch contractile properties tree frog Hyla chrysoscelis Hyla versicolor Sound-producing muscles can provide a suitable model to study the limits of power...

... and that required during takeoff. The present study provides integrated data on muscle contractile properties, morphology and jumping performance that support this conclusion. We show here that the predicted power output during takeoff in Cuban tree frogs Osteopilus septentrionalis exceeds that available from...

...Ian A. Johnston; Craig E. Franklin; Timothy P. Johnson ABSTRACT Muscle action during swimming and the contractile properties of isolated muscle fibres were studied in the short-horned sculpin Myoxocephalus scorpius at 5 ° C. Semi-steady swimming, startle responses and prey-capture events were...

...John M. Olson; Richard L. Marsh ABSTRACT The isometric and isotonic contractile properties of the cross-striated adductor muscle of the bay scallop ( Argopecten irradians ) were measured in vitro at 10, 15 and 20°C. The length at which twitch force was maximal as a function of the closed length...

... & Johnston, 1987 ). The electrophysiological and contractile properties of these fibres have been little studied. Barets (1961) provided evidence that slow myotomal muscles in teleosts are activated by JPs, although Stanfield (1972) suggested that similar fibres in elasmobranchs may be capable...

...Richard L. Marsh ABSTRACT Ontogenetic allometries of running performance in 3-to 4-m burst runs (sprints) and of the contractile properties of the fast-twitch, glycolytic region of the iliofibularis muscle (FG-IF) were measured in Dipsosaurus dorsalis . This iguanid lizard hatches at a body mass...

... , C. A. ( 1938 ). A portable apparatus for the determination of oxygen dissolved in a small volume . J. exp. Biol . 15 , 437 – 445 . 10.1242/jeb.15.3.437 Granzier , H. L. M. , Wiersma , J. , Akster , H. A. & Osse , J. W. M. ( 1983 ). Contractile properties...

... of T b from 15 to 40°C. Lizards with a T b of 10°C were largely incapacitated, and V R , f and L s were all greatly reduced. Comparisons with measurements of the contractile properties of skeletal muscle of this species suggest that stride frequency is limited by the twitch contraction time...

...R. L. Marsh; A. F. Bennett ABSTRACT The isometric and isotonic contractile properties of fast-twitch glycolytic fibres of the iliofibularis muscle (FG-IF) in the lizard Sceloporus occidentalis were measured in vitro at 5°C intervals from 10 to 40°C. The mean isometric parameters at 35°C...

... maximally activated and force-velocity (P-V) characteristics determined by step tension releases using an isotonic lever. Unloaded shortening speed was independently determined using the slack-test method. The contractile properties of flounder skinned fibres are not altered by temperature acclimation...