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This is largely a shot in the dark, but is there any material on the sizes and dimensions individual muscles of the leg of Tyrannosaurus? I tried to look at the data from Sellers et al. 2017 but unfortunately I am not fluent in the source code of gaitsym (although if someone knows the material and how to read said source code, having that information shared would be greatly appreciated). I am largely interested in this to try and calculate individual PCSAs and see how varying fiber lengths and degrees of pennation can change force generation (if it is of interest, I am also happy to share whatever I come across that may be somewhat interesting).
Best,
Adrian
Jura
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Sep 17, 2024, 6:16:39 PMSep 17
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Carrano and Hutchinson 2002 are a good reference here. They go over all the individual hindlimb musculature based on scarring patterns on the bone, and inferred homology based on bird and crocodylian dissections.
Unrelated, but also kinda related, Burch 2017 (myology of Majungasaurus forelimb) offers another useful insight into inferring muscle mass based on homologous landmarks.
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This is indeed a good reference! I am largely able to work out the length of individual muscles now (although radius, volume, and PCSA will take some time).
Also quite interesting, I will be giving this a more thorough read over it deserves but it does seem reasonably intuitive. Thank you again for sharing both of these, it makes the process significantly more do-able.
Best,
Adrian
Martin Bäker
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7:01 AM (2 hours ago) 7:01 AM
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Late to the part,y but there is also a huge table with muscle and segment in our 2009-paper
Constraint-Based Exclusion of Limb Poses for Reconstructing Theropod Dinosaur Locomotion Authors: Gatesy, Stephen M., Bäker, Martin, and Hutchinson, John R.