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Broad similarities in shoulder muscle architecture and organization across two amniotes: Implications for reconstructing non-mammalian synapsids

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8 days ago
Broad similarities in shoulder muscle architecture and organization across two amniotes: Implications for reconstructing non-mammalian synapsids https://t.co/5hNd2jjQ3G https://t.co/zaAZzXFqY5
10 days ago
PJpreprint: Broad similarities in shoulder muscle architecture and organization across two amniotes: Implications for reconstructing non-mammalian synapsids https://t.co/hdsbjk1iwU
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Supplemental Information

Specimen treatment for contrast-enhanced µCT scanning

DOI: 10.7287/peerj.preprints.27950v1/supp-1

Specimen treatment for muscle architecture dissections

DOI: 10.7287/peerj.preprints.27950v1/supp-2

Full table of architecture, including functional ratios

Abbreviations and symbols: Mm, muscle mass; Mmtu, muscle-tendon unit mass; Lm, muscle length; Lmtu, muscle-tendon unit length; Lf, fascicle length; θ, pennation angle; PCSA, physiological cross-sectional area.

DOI: 10.7287/peerj.preprints.27950v1/supp-3

Measured and predicted body masses from humeral and femoral mid-diaphyseal circumferences

DOI: 10.7287/peerj.preprints.27950v1/supp-4

PCSA:Origin Area ratios for m. supracoracoideus

DOI: 10.7287/peerj.preprints.27950v1/supp-5

Homologies of m. deltoideus acromialis and m. scapulohumeralis anterior

DOI: 10.7287/peerj.preprints.27950v1/supp-6

High-contrast version of Figure 7

Functional morphospace comparing normalized PCSA against normalized fascicle length. Muscles tend to vary along either one axis or the other, consistent with a tradeoff between force production (y-axis) and working range (x-axis). Muscle abbreviations and color-coding follow Figure 1 legend.

DOI: 10.7287/peerj.preprints.27950v1/supp-7

Raw Muscle Architecture Measurements

DOI: 10.7287/peerj.preprints.27950v1/supp-8

Additional Information

Competing Interests

Stephanie E. Pierce is an Academic Editor for PeerJ.

Author Contributions

Philip Fahn-Lai conceived and designed the experiments, performed the experiments, analyzed the data, prepared figures and/or tables, authored or reviewed drafts of the paper, approved the final draft.

Andrew A Biewener conceived and designed the experiments, approved the final draft.

Stephanie E Pierce conceived and designed the experiments, analyzed the data, authored or reviewed drafts of the paper, approved the final draft.

Data Deposition

The following information was supplied regarding data availability:

Raw CT Data are available at Morphosource, accession numbers: S25440, S25439. URL: https://www.morphosource.org/Detail/ProjectDetail/Show/project_id/847

Funding

This project was supported by National Science Foundation grant no. DEB-1754459 (S.E.P.), the Department of Organismic and Evolutionary Biology at Harvard University (P.F.L.), and the Robert A. Chapman Fellowship (P.F.L.). The funders had no role in study design, data collection and analysis, decision to publish, or preparation of the manuscript.


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