Tyrannosaurus Leg Musculature Literature

[Adrian Boeye]

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]

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.

https://onlinelibrary.wiley.com/doi/abs/10.1002/jmor.10018

Unrelated, but also kinda related, Burch 2017 (myology of Majungasaurus forelimb) offers another useful insight into inferring muscle mass based on homologous landmarks.

https://onlinelibrary.wiley.com/doi/full/10.1111/joa.12660

Cheers,

Jason

[Adrian Boeye]

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]

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.