Figure 1 in Tyrannosaurus was not a fast runner
| Main Authors: | Hutchinson, John R., Garcia, Mariano |
|---|---|
| Format: | info Image |
| Terbitan: |
, 2002
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| Subjects: | |
| Online Access: |
https://zenodo.org/record/3724613 |
Daftar Isi:
- Figure 1 Explanation of freebody diagram analysis of body segments. Skeletal illustration modified from ref. 6. The initial Tyrannosaurus model (Trex_1) is shown in right lateral view and (x, y)coordinate space, with the origin located at the toe joint. Pelvic pitch, hip, knee, ankle and toe joint angle definitions are shown (see Supplementary Information). One of the angles is redundant (four angles suffice). The ground reaction force (GRF) is vertical (typical for midstance12–14) and acts at a distance R from the toe joints. The body segment weights (Wb, Wt, Ws and Wm for the trunk, thigh, shank and metatarsus) are also shown. A freebody diagram was used to calculate the internal moments about each joint. For example, about the knee joint (see inset), the moment that knee extensor muscles must generate (Mk) is equal to the ankle contact force (Fa) times its respective moment arm, plus the gravitational moment of the shank segment and the ankle moment (Ma).
- Published as part of Hutchinson, John R. & Garcia, Mariano, 2002, Tyrannosaurus was not a fast runner, pp. 1018-1021 in Nature 415 on page 1018, DOI: 10.1038/4151018a, http://zenodo.org/record/3724611