A neurobiological model of the recovery strategies from perturbed walking

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This paper proposes a human mimetic neuro-musculo-skeletal model to simulate the recovery reactions from perturbations during walking. The computational model incorporates nonlinear viscoelastic muscular mechanics, supraspinal control of the center-of-mass, spinal pattern generator including muscle synergy network, spinal reflexes, and long-loop reflexes. Especially the long-loop reflexes specify recovery strategies based on the experimental observations [Schillings, A.M., van Wezel, B.M.H., Mulder, T.H., Duysen, J., 2000. Muscular responses and movement strategies during stumbling over obstacles. J. Neurophysiol. 83, 2093-2102; Eng, J.J., Winter, D.A., Patla, A.E., 1994. Strategies for recovery from a trip in early and late swing during human walking. Exp. Brain Res. 102, 339-349]. The model demonstrates two typical recovery strategies, i.e., elevating and lowering strategies against pulling over a swing leg. Sensed perturbation triggers a simple tonic pulse from the cortex. Depending on the swing phase, the tonic pulse activates a different compound of muscles over lower limbs. The compound induces corresponding recovery strategies. The reproduction of principal recovery behaviors may support the model's proposed functional and/or anatomical correspondence. (c) 2007 Elsevier Ireland Ltd. All rights reserved.
Publisher
ELSEVIER SCI LTD
Issue Date
2007
Language
English
Article Type
Article
Keywords

CENTRAL PATTERN GENERATOR; SPINAL-CORD-INJURY; CUTANEOUS REFLEXES; LOCOMOTOR-ACTIVITY; PHASE RESET; HUMAN GAIT; MOVEMENT; JOINT; CEREBELLUM; POSTURE

Citation

BIOSYSTEMS, v.90, no.3, pp.750 - 768

ISSN
0303-2647
DOI
10.1016/j.biosystems.2007.03.003
URI
http://hdl.handle.net/10203/90603
Appears in Collection
CS-Journal Papers(저널논문)
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