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2,952 results for “limb”
Data from: Fin ray patterns at the fin to limb transition
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Fluctuation of cellular differentiation in limb regeneration is regulated by Pde4b in urodele amphibians
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Data from: From limb to fin: an Eocene protocetid forelimb from Senegal sheds new light on the early locomotor evolution of cetaceans
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Data from: Rates of dinosaur limb evolution provide evidence for exceptional radiation in Mesozoic birds
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Data from: Adjunctive clindamycin for cellulitis: clinical trial comparing flucloxacillin with or without clindamycin for the treatment of limb cellulitis
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Data from: Cut your losses: self-amputation of injured limbs increases survival
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Patterns of fluctuating asymmetry in the limbs of freshwater turtles: are more functionally important limbs more symmetrical?
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Data from: Phylogenetic inference and divergence dating of snakes using molecules, morphology and fossils: new insights into convergent evolution of feeding morphology and limb reduction
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Different drivers of diversification for body elongation and limb reduction in convergently snake-like lizards
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The functional diversity of marsupial limbs is influenced by both ecology and developmental constraint
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Data from: Natural history of limb girdle muscular dystrophy R9 over 6 years: searching for trial endpoints
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A highly conserved ontogenetic limb allometry and its evolutionary significance in the adaptive radiation of Anolis lizards
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Data from: Fixational saccade inhibition and pupil dilation during self-paced limb movement preparation
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Data from: Weighing homoplasy against alternative scenarios with the help of macroevolutionary modeling: a case study on limb bones of fossorial sciuromorph rodents
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Data from: Exploring the effects of giraffe skin disease limb lesions on locomotion
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Thermal plasticity of setae of the second limb of Daphnia
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Sarcomere length non-uniformities dictate force production along the descending limb of the force-length relation
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Multiple sequence alignments and phylogenetic trees from: Co-option of the limb patterning program in cephalopod eye development
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Mechanics of walking and running up and downhill: A joint-level perspective to guide design of lower-limb exoskeletons
Lower-limb wearable robotic devices can improve clinical gait and reduce energetic demand in healthy populations. To help enable real-world use, we sought to examine how assistance should be applied in variable gait conditions and suggest an approach derived from knowledge of human locomotion mechanics to establish a 'roadmap' for wearable robot design. We characterized the changes in joint mechanics during walking and running across a range of incline/decline grades and then provide an analysis that informs the development of lower-limb exoskeletons capable of operating across a range of mechanical demands. We hypothesized that the distribution of limb-joint positive mechanical power would shift to the hip for incline walking and running and that the distribution of limb-joint negative mechanical power would shift to the knee for decline walking and running. Eight subjects (6M,2F) completed five walking (1.25 m s -1 ) trials at -8.53º, -5.71º, 0º, 5.71º, and 8.53º grade and five running (2.25 m s -1 ) trials at -5.71º, -2.86º, 0º, 2.86º, and 5.71º grade on a treadmill. We calculated time-varying joint moment and power output for the ankle, knee, and hip. For each gait, we examined how individual limb-joints contributed to total limb positive, negative and net power across grades. For both walking and running, changes in grade caused a redistribution of joint mechanical power generation and absorption. From level to incline walking, the ankle's contribution to limb positive power decreased from 44% on the level to 28% at 8.53º uphill grade ( p < 0.0001) while the hip's contribution increased from 27% to 52% ( p < 0.0001). In running, regardless of the surface gradient, the ankle was consistently the dominant source of lower-limb positive mechanical power (47-55%). In the context of our results, we outline three distinct use-modes that could be emphasized in future lower-limb exoskeleton designs 1) Energy injection: adding positive work into the gait cycle, 2) Energy extraction: removing negative work from the gait cycle, and 3) Energy transfer: extracting energy in one gait phase and then injecting it in another phase (i.e., regenerative braking).
PERMANOVA results from Principal component analysis of avian hind limb and foot morphometrics and the relationship between ecology and phylogeny
<p class="MsoNoSpacing">Principal component analysis has been used to test for similarities in ecology and life habit between modern and fossil birds, however, the two main portions of the hindlimb—the foot and the long bone elements—have not been examined separately. We examine the potential links between morphology, ecology, and phylogeny through a synthesis of phylogenetic paleoecological methods and morphospace analysis. Both hindlimb morphologies and species' ecologies exhibit extreme phylogenetic clumping, although these patterns are at least partially explainable by a Brownian motion style of evolution. Some morphologies are strongly correlated with particular ecologies, while some ecologies are occupied by a variety of morphologies. Within the morphospace analyses, the length of the hallux (toe I) is the most defining characteristic of the entire hindlimb. The foot and hindlimb are represented on different axes when all measurements are considered in an analysis, suggesting that these structures undergo morphological change separately from each other. Early birds tend to cluster together, representing an unspecialized basal foot morphotype and a hindlimb reliant on hip-driven, not knee-driven, locomotion. Direct links between morphology, ecology, and phylogeny are unclear and complicated, and may be biased due to sample size (~60 species). This study should be treated as a preliminary analysis that further studies, especially those examining the vast diversity of modern birds, can build upon.</p>
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Allen Brain Atlas
Allen Brain Atlas is an Allen Institute collection of brain map atlases, datasets, APIs, and analysis tools covering mouse, human, and non-human primate brain resources.
Annotated Behaviour and Observability Dataset (ABODe)
ABODe is a University of Edinburgh DataShare dataset for behavior classification in group-housed mice using home-cage video, identities, bounding boxes, ground-plate positions, and annotator labels.
DANDI Archive for NWB datasets
DANDI is a BRAIN Initiative archive for publishing and sharing neurophysiology data, including electrophysiology, optophysiology, and behavioral data packaged as NWB and related standards.
International Brain Laboratory public data
The International Brain Laboratory public data releases expose standardized mouse decision-making experiments, including Neuropixels recordings, widefield calcium imaging, behavior, and session metadata accessed through the ONE API.
OpenNeuro
OpenNeuro is a free, open platform for sharing neuroimaging datasets, with public search, dataset pages, and download paths for web, S3, DataLad, and the OpenNeuro CLI.