keyword
MENU ▼
Read by QxMD icon Read
search

skate

keyword
https://www.readbyqxmd.com/read/29425489/the-ancient-origins-of-neural-substrates-for-land-walking
#1
Heekyung Jung, Myungin Baek, Kristen P D'Elia, Catherine Boisvert, Peter D Currie, Boon-Hui Tay, Byrappa Venkatesh, Stuart M Brown, Adriana Heguy, David Schoppik, Jeremy S Dasen
Walking is the predominant locomotor behavior expressed by land-dwelling vertebrates, but it is unknown when the neural circuits that are essential for limb control first appeared. Certain fish species display walking-like behaviors, raising the possibility that the underlying circuitry originated in primitive marine vertebrates. We show that the neural substrates of bipedalism are present in the little skate Leucoraja erinacea, whose common ancestor with tetrapods existed ∼420 million years ago. Leucoraja exhibits core features of tetrapod locomotor gaits, including left-right alternation and reciprocal extension-flexion of the pelvic fins...
February 8, 2018: Cell
https://www.readbyqxmd.com/read/29422624/deep-sea-hydrothermal-vents-as-natural-egg-case-incubators-at-the-galapagos-rift
#2
Pelayo Salinas-de-León, Brennan Phillips, David Ebert, Mahmood Shivji, Florencia Cerutti-Pereyra, Cassandra Ruck, Charles R Fisher, Leigh Marsh
The discovery of deep-sea hydrothermal vents in 1977 challenged our views of ecosystem functioning and yet, the research conducted at these extreme and logistically challenging environments still continues to reveal unique biological processes. Here, we report for the first time, a unique behavior where the deep-sea skate, Bathyraja spinosissima, appears to be actively using the elevated temperature of a hydrothermal vent environment to naturally "incubate" developing egg-cases. We hypothesize that this behavior is directly targeted to accelerate embryo development time given that deep-sea skates have some of the longest egg incubation times reported for the animal kingdom...
February 8, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29395229/getting-in-shape-reconstructing-three-dimensional-long-track-speed-skating-kinematics-by-comparing-several-body-pose-reconstruction-techniques
#3
E van der Kruk, A L Schwab, F C T van der Helm, H E J Veeger
In gait studies body pose reconstruction (BPR) techniques have been widely explored, but no previous protocols have been developed for speed skating, while the peculiarities of the skating posture and technique do not automatically allow for the transfer of the results of those explorations to kinematic skating data. The aim of this paper is to determine the best procedure for body pose reconstruction and inverse dynamics of speed skating, and to what extend this choice influences the estimation of joint power...
January 17, 2018: Journal of Biomechanics
https://www.readbyqxmd.com/read/29383744/comparative-anatomy-of-the-clasper-of-the-subfamily-potamotrygoninae-chondrichthyes-myliobatiformes
#4
Renan A de Moreira, Thiago S Loboda, Marcelo R de Carvalho
Claspers of stingrays (Myliobatiformes) are poorly documented in comparison to claspers of skates, with our knowledge restricted mainly to external morphological characters and skeletal components included in descriptions of new species; more encompassing morphological comparative analyses are lacking. Concerning potamotrygonins, clasper morphology has been described for a handful of species, but without elucidating their variation and systematic potential. The present article analyzed clasper structures in all genera of the subfamily Potamotrygoninae (Potamotrygon, Paratrygon, Plesiotrygon, and Heliotrygon), which were compared to the clasper of Styracura and some dasyatid genera...
January 31, 2018: Journal of Morphology
https://www.readbyqxmd.com/read/29345552/preceding-race-efforts-affect-pacing-and-short-track-speed-skating-performance
#5
Marco J Konings, Florentina J Hettinga
PURPOSE: To examine whether preceding high-intensity race efforts in a competitive weekend affected pacing behaviour and performance in elite short-track speed skaters. METHODS: Finishing and intermediate lap times were gathered from 500, 1000 and 1500 m Short Track Speed Skating World Cups during the seasons 2011-2016. The effect of preceding races on pacing behaviour and performance was explored using two studies. Study I: the effect of competing in extra races due to the Repechage (Rep) system, leading to an increased number of high-intensity race efforts prior to the subsequent main tournament race, was explored (500m: N=32, 1000m: N=34; 1500m: N=47)...
January 18, 2018: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/29324580/the-relationship-between-skating-economy-and-performance-during-a-repeated-shift-test-in-elite-and-sub-elite-ice-hockey-players
#6
Nicholas R Lamoureux, Grant R Tomkinson, Benjamin J Peterson, John S Fitzgerald
The purpose of this study was to determine the importance of skating economy to fatigue during repeated high-intensity efforts of a simulated ice hockey shift. Forty-five collegiate and Junior A male ice hockey players (aged 18-24 years) performed a continuous graded exercise test using a skate treadmill. Breath-by-breath data for oxygen consumption (V[Combining Dot Above]O2) and respiratory exchange ratio were collected and used to derive energy expenditure (EE) averaged over the final 10 seconds of each stage...
January 5, 2018: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/29315031/osmolyte-adjustments-as-a-pressure-adaptation-in-deep-sea-chondrichthyan-fishes-an-intraspecific-test-in-arctic-skates-amblyraja-hyperborea-along-a-depth-gradient
#7
Paul H Yancey, Ben Speers-Roesch, Sheila Atchinson, James D Reist, Andrew R Majewski, Jason R Treberg
Accumulation of trimethylamine N-oxide (TMAO) by deep-sea animals is proposed to protect proteins against the destabilizing effects of high hydrostatic pressure (the piezolyte hypothesis). Chondrichthyan fishes (sharks, rays, and chimaeras) provide a unique test of this hypothesis because shallow-living species have elevated TMAO levels to counteract the destabilizing effects of high urea levels accumulated for osmoregulation. Limited interspecific studies of chondrichthyans reveal that increasing depth correlates with decreased urea and increased TMAO levels, suggesting a dynamic balance between destabilizing forces on proteins (high urea, hydrostatic pressure) and TMAO to counteract these forces...
March 2018: Physiological and Biochemical Zoology: PBZ
https://www.readbyqxmd.com/read/29288962/assessing-dynamic-postural-control-during-exergaming-in-older-adults-a-probabilistic-approach
#8
V Soancatl Aguilar, C J C Lamoth, N M Maurits, J B T M Roerdink
Digital games controlled by body movements (exergames) have been proposed as a way to improve postural control among older adults. Exergames are meant to be played at home in an unsupervised way. However, only few studies have investigated the effect of unsupervised home-exergaming on postural control. Moreover, suitable methods to dynamically assess postural control during exergaming are still scarce. Dynamic postural control (DPC) assessment could be used to provide both meaningful feedback and automatic adjustment of exergame difficulty...
December 16, 2017: Gait & Posture
https://www.readbyqxmd.com/read/29277002/distribution-of-anisakid-nematodes-parasitizing-rajiform-skates-under-commercial-exploitation-in-the-southwestern-atlantic
#9
Manuel Marcial Irigoitia, Paola Elizabeth Braicovich, Ana Laura Lanfranchi, Marisa Diana Farber, Juan Tomás Timi
In order to evaluate the infestation by anisakids present in elasmobranchs and their distribution in the Argentine Sea, this study was carried at a regional scale with the following aims: 1) to identify those anisakid species present in skates under exploitation; 2) to characterize quantitatively these infestations and 3) to determine those factors driving the variability in parasite burdens across skate species. A total of 351 skates, belonging to 3 species (218 Sympterygia bonapartii, 86 Zearaja chilensis and 47 Atlantoraja castelnaui) and from different localities of the Argentine Sea were examined for anisakids...
December 19, 2017: International Journal of Food Microbiology
https://www.readbyqxmd.com/read/29250342/hip-dysplasia-in-wrestlers-three-lessons-learned
#10
J W Thomas Byrd, John C Clohisy, Young-Jo Kim, F Winston Gwathmey, Kay S Jones, Michael B Millis
Hip problems due to dysplasia are commonly associated with female athletes in sports demanding supraphysiologic motion, such as ballet, gymnastics and figure skating. However, hip problems are rarely mentioned among wrestlers, a male sport in which flexibility is advantageous. Dysplasia may have a mostly unrecognized prevalence among wrestlers that can lead to problems and benefit from reorientation periacetabular osteotomy (PAO). Study design in this research is Level 4 evidence case reports. Three consecutive intercollegiate wrestlers ages 20, 21 and 22 years underwent PAO for dysplasia and are reported...
December 2017: Journal of Hip Preservation Surgery
https://www.readbyqxmd.com/read/29248570/synthetic-capacity-does-not-predict-elasmobranchs-ability-to-maintain-trimethylamine-oxide-without-a-dietary-contribution
#11
Abigail B Bockus, Brad A Seibel
Trimethylamine oxide (TMAO) is an organic osmolyte and universal protein stabilizer. Its role as a cytoprotectant is particularly important in ureosmotic elasmobranchs that accumulate high levels of urea, a macromolecular perturbant. Feeding is a key component in the turnover and maintenance of these nitrogenous compounds. However, previous studies examining TMAO regulation have been largely completed using starved individuals, when nitrogen balance is altered. Here, under fed conditions, we test the importance of dietary TMAO on long-term maintenance in three elasmobranch species with differing endogenous synthetic capacities...
December 14, 2017: Comparative Biochemistry and Physiology. Part A, Molecular & Integrative Physiology
https://www.readbyqxmd.com/read/29214009/the-role-of-hoxa11-and-hoxa13-in-the-evolution-of-novel-fin-morphologies-in-a-representative-batoid-leucoraja-erinacea
#12
Shannon N Barry, Karen D Crow
Background: Batoids exhibit unique body plans with derived fin morphologies, such as the anteriorly expanded pectoral fins that fuse to the head, or distally extended anterior pelvic fin lobes used for a modified swimming technique utilized by skates (Rajidae). The little skate (Leucoraja erinacea), exhibits both of these unique fin morphologies. These fin modifications are not present in a typical shark body plan, and little is known regarding the mechanisms underlying their development...
2017: EvoDevo
https://www.readbyqxmd.com/read/29210955/comparison-between-power-off-ice-test-and-performance-on-ice-anaerobic-testing
#13
Vincent Gosselin Boucher, Andrée-Anne Parent, Fanie St-Jean Miron, Mario Leone, Alain Steve Comtois
The importance of specific testing has been shown in ice hockey performance and the understanding and connection between them may lead to adapting training and follow up in elite athletes. The aim of the present study was to compare two off-ice power tests with performances on ice with a complete professional hockey team. The broad jump test and the vertical jump test were used for the off-ice evaluations, while the SAS-40 and the repeated skate sprint modify (RSSm) tests were used as the performance variables...
November 27, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/29196236/berries-containing-anthocyanins-with-enhanced-methylation-profiles-are-more-effective-at-ameliorating-high-fat-diet-induced-metabolic-damage
#14
Emily Skates, John Overall, Katelyn Dezego, Mickey Wilson, Debora Esposito, Mary Ann Lila, Slavko Komarnytsky
Driven by the need for alternative whole food options to manage metabolic syndrome, multiple dietary interventions are suggested to achieve a better control of metabolic risk factors and molecular networks that regulate cellular energy metabolism. It is generally accepted that anthocyanin-rich diets are beneficial for maintaining healthy body weight, improving glucose and lipid metabolism, and determining inflammatory status of key metabolic tissues. However, anthocyanins are a structurally diverse group of phenolic compounds and their individual contributions to improving metabolic health are not clear...
November 28, 2017: Food and Chemical Toxicology
https://www.readbyqxmd.com/read/29167367/embryonic-origin-of-the-gnathostome-vertebral-skeleton
#15
Katharine E Criswell, Michael I Coates, J Andrew Gillis
The vertebral column is a key component of the jawed vertebrate (gnathostome) body plan, but the primitive embryonic origin of this skeleton remains unclear. In tetrapods, all vertebral components (neural arches, haemal arches and centra) derive from paraxial mesoderm (somites). However, in teleost fishes, vertebrae have a dual embryonic origin, with arches derived from somites, but centra formed, in part, by secretion of bone matrix from the notochord. Here, we test the embryonic origin of the vertebral skeleton in a cartilaginous fish (the skate, Leucoraja erinacea) which serves as an outgroup to tetrapods and teleosts...
November 29, 2017: Proceedings. Biological Sciences
https://www.readbyqxmd.com/read/29160140/the-effects-of-weighted-skates-on-ice-skating-kinematics-kinetics-and-muscular-activity
#16
Matthew P Mavor, Dean C Hay, Ryan B Graham
Sport-specific resistance training, through limb loading, can be a complimentary training method to traditional resistance training by loading the working muscles during all phases of a specific movement. The purpose of this study was to examine the acute effects of skating with an additional load on the skate, using a skate weight prototype, on kinematics, kinetics, and muscle activation during the acceleration phase while skating on a synthetic ice surface. 10 male hockey skaters accelerated from rest (standing erect with knees slightly bent) under four non-randomized load conditions: baseline 1 (no weight), light (0...
November 21, 2017: Journal of Sports Sciences
https://www.readbyqxmd.com/read/29158392/high-postural-costs-and-anaerobic-metabolism-during-swimming-support-the-hypothesis-of-a-u-shaped-metabolism-speed-curve-in-fishes
#17
Valentina Di Santo, Christopher P Kenaley, George V Lauder
Swimming performance is considered a key trait determining the ability of fish to survive. Hydrodynamic theory predicts that the energetic costs required for fishes to swim should vary with speed according to a U-shaped curve, with an expected energetic minimum at intermediate cruising speeds and increasing expenditure at low and high speeds. However, to date no complete datasets have shown an energetic minimum for swimming fish at intermediate speeds rather than low speeds. To address this knowledge gap, we used a negatively buoyant fish, the clearnose skate Raja eglanteria, and took two approaches: a classic critical swimming speed protocol and a single-speed exercise and recovery procedure...
November 20, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/29158384/trunk-neural-crest-origin-of-dermal-denticles-in-a-cartilaginous-fish
#18
J Andrew Gillis, Els C Alsema, Katharine E Criswell
Cartilaginous fishes (e.g., sharks and skates) possess a postcranial dermal skeleton consisting of tooth-like "denticles" embedded within their skin. As with teeth, the principal skeletal tissue of dermal denticles is dentine. In the head, cranial neural crest cells give rise to the dentine-producing cells (odontoblasts) of teeth. However, trunk neural crest cells are generally regarded as nonskeletogenic, and so the embryonic origin of trunk denticle odontoblasts remains unresolved. Here, we use expression of FoxD3 to pinpoint the specification and emigration of trunk neural crest cells in embryos of a cartilaginous fish, the little skate (Leucoraja erinacea)...
November 20, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/29140137/v%C3%AC-o2-and-muscle-deoxygenation-kinetics-during-skating-comparison-between-slide-board-and-treadmill-skating
#19
Tatiane Piucco, Rogério Soares, Fernando Diefenthaeler, Guillaume Millet, Juan Murias
PURPOSE: this study aimed to compare the oxygen uptake (V̇O2) kinetics during skating on a treadmill and skating on a slide board and discuss potential mechanisms that might control the V̇O2 kinetics responses during skating. METHODS: breath-by-breath pulmonary V̇O2 and near-infrared spectroscopy-derived muscle deoxygenation ([HHbMb]) were monitored continuously in 12 well-trained young long track speed skaters. On-transient V̇O2 and [HHbMb] responses to skating on a treadmill and skating on a slide board at 80% of the estimated gas exchange threshold were fitted as mono-exponential function...
November 15, 2017: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/29127930/indoor-air-quality-of-environments-used-for-physical-exercise-and-sports-practice-systematic-review
#20
REVIEW
Alexandro Andrade, Fábio Hech Dominski
BACKGROUND: Systematic reviews have the potential to contribute substantially to environmental health and risk assessment. OBJECTIVE: This study aimed to investigate indoor air quality of environments used for physical exercise and sports practice through a systematic review. METHODS: The systematic review followed the PRISMA guidelines and was recorded in the PROSPERO registry (CRD42016036057). The search was performed using the SciELO, Science Direct, Scopus, LILACS, MEDLINE via PubMed, and SPORTDiscus databases, from their inception through April 2017...
November 8, 2017: Journal of Environmental Management
keyword
keyword
82503
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"