ArticleAnimals : an open access journal from MDPI2026
Preliminary Immunohistochemical Assessment of Slow-Fiber Distribution and Clustering in Skeletal Muscles of 4-Week- and 6-Month-Old Pigs.
Article in Animals : an open access journal from MDPI, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
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Abstract
Type I (slow-twitch) muscle fibers differ in proportion among skeletal muscles, but their local spatial organization remains poorly characterized. This preliminary cross-sectional study investigated whether muscle-specific characteristics were reflected not only in the proportion of slow myosin-positive fibers but also in their clustering architecture. The longissimus, psoas major, semitendinosus, and triceps brachii muscles were collected from pigs at 4 weeks and 6 months of age. All six pigs were female, and live body-weight records were unavailable. Slow myosin-positive muscle fibers (slow fibers) were identified by immunohistochemistry, and adjacent positive fibers were defined as clusters. In pairwise tests at 6 months, the proportion of slow fibers was significantly higher in the psoas major than in the other three muscles, although the main effect of muscle across both ages was not significant (
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