Biomechanical simulations of hindlimb function in Alligator provide insights into postural shifts and body size evolution
文献类型：期刊论文
| 作者 | Iijima, Masaya1,2,3; Blob, Richard W.4; Hutchinson, John R.2 |
| 刊名 | SCIENCE ADVANCES
 |
| 出版日期 | 2025-10-22 |
| 卷号 | 11期号:43页码:12 |
| DOI | 10.1126/sciadv.adx3811 |
| 英文摘要 | The shift from sprawling to erect limb postures in archosaurs during the Triassic represents a major evolutionary transformation in vertebrates. One unresolved question regarding the limb posture transition is its association with body size evolution. If adopting more erect limb postures reduces mass-specific muscle forces and bone stresses, it would enable the evolution of larger body sizes. We tested this prediction using computational modeling and simulation of hindlimb muscle activations and femoral stresses across limb postures and body sizes in juvenile to adult American alligators and a scaled model of the extinct giant alligatoroid Deinosuchus riograndensis. We showed that larger alligators and D. riograndensis encounter challenges in generating sufficient muscle forces to support their bodies and maintain bone stresses, whereas adopting more erect hindlimb postures helps mitigate bone stresses among individuals of similar sizes. These results show how the shift from sprawling to erect limb posture relaxed biomechanical constraints, potentially facilitating the evolution of larger body sizes in terrestrial tetrapods. |
| WOS关键词 | IN-VIVO STRAINS ; TERRESTRIAL LOCOMOTION ; IGUANA-IGUANA ; LIMB POSTURE ; BONE STRAIN ; MECHANICS ; MISSISSIPPIENSIS ; MUSCLE ; DINOSAURS ; STRESSES |
| 资助项目 | National Natural Science Foundation of China[W2532029] ; JSPS Grant-in-Aid for Scientific Research[25K18518] |
| WOS研究方向 | Science & Technology - Other Topics |
| 语种 | 英语 |
| WOS记录号 | WOS:001598753100002 |
| 出版者 | AMER ASSOC ADVANCEMENT SCIENCE |
| 源URL | [http://119.78.100.205/handle/311034/24852]  |
| 专题 | 中国科学院古脊椎动物与古人类研究所 |
| 通讯作者 | Iijima, Masaya |
| 作者单位 | 1.Chinese Acad Sci, Inst Vertebrate Paleontol & Paleoanthropol, Key Lab Vertebrate Evolut & Human Origins, Beijing 100044, Peoples R China 2.Royal Vet Coll, Dept Comparat Biomed Sci, Struct & Mot Lab, Hawkshead Lane, N Mymms AL9 7TA, England 3.Univ Tokyo, Grad Sch Frontier Sci, Dept Nat Environm Studies, Kashiwa 2770882, Japan 4.Clemson Univ, Dept Biol Sci, Clemson, SC 29634 USA |
| 推荐引用方式 GB/T 7714 | Iijima, Masaya,Blob, Richard W.,Hutchinson, John R.. Biomechanical simulations of hindlimb function in Alligator provide insights into postural shifts and body size evolution[J]. SCIENCE ADVANCES,2025,11(43):12. |
| APA | Iijima, Masaya,Blob, Richard W.,&Hutchinson, John R..(2025).Biomechanical simulations of hindlimb function in Alligator provide insights into postural shifts and body size evolution.SCIENCE ADVANCES,11(43),12. |
| MLA | Iijima, Masaya,et al."Biomechanical simulations of hindlimb function in Alligator provide insights into postural shifts and body size evolution".SCIENCE ADVANCES 11.43(2025):12. |
入库方式： OAI收割
来源：古脊椎动物与古人类研究所
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