Key result
Helical muscle fibres are suggested as evolutionary adaptations generating high active tensions during superelongation.
Helical muscle fibers likely evolved as an adaptation to hydroskeletons, allowing high active tension during superelongation via unique thick and thin filament interactions.
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Hypothesis-generating for hydrostatic muscle mechanics; leaves open experimental validation across taxa.
Giulio Lanzavecchia (1981) conducted a review in Helical and cross-striated muscles. Helical muscle fibres are suggested to be an evolutionary adaptation to the hydroskeleton, capable of developing high active tensions during superelongation via changes in filament relationships.
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