Biomechanical capabilities influence postural control strategies in the cat hindlimb
| Autor: | J. Lucas McKay, Thomas J. Burkholder, Lena H. Ting |
|---|---|
| Rok vydání: | 2007 |
| Předmět: |
Physics
Posture Physics::Medical Physics Rehabilitation Mathematical analysis Biomedical Engineering Biophysics Hindlimb Horizontal plane Right hindlimb Models Biological Article Biomechanical Phenomena Postural control Computer Science::Robotics Maxima and minima Control theory Hindlimb structure Cats Animals Orthopedics and Sports Medicine Maxima Locomotion |
| Zdroj: | Journal of Biomechanics. 40:2254-2260 |
| ISSN: | 0021-9290 |
| DOI: | 10.1016/j.jbiomech.2006.10.013 |
| Popis: | During postural responses to perturbations, horizontal plane forces generated by the cat hindlimb are stereotypically directed either towards or away from the animal's center of mass, independent of perturbation direction. We used a static, three-dimensional musculoskeletal model of the hindlimb to investigate possible biomechanical determinants of this "force constraint strategy." We hypothesized that directions in which the hindlimb can produce large forces are preferentially used in postural control. We computed feasible force sets (FFSs) based on hindlimb configurations of three cats during postural equilibrium tasks and compared them to horizontal plane postural force directions. The grand mean FFS was bimodal, with maxima near the posterior-anterior axis (-86+/-8 degrees and 71+/-4 degrees ), and minima near the medial-lateral axis (177+/-8 degrees and 8+/-8 degrees ). Experimental postural force directions clustered near both maxima; there were no medial postural forces near the absolute minimum. However, the medians of the anterior and posterior postural force direction histograms in the right hindlimb were rotated counter-clockwise from the FFS maxima (p |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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