Anticipatory locomotor adjustments for accommodating versus avoiding level changes in humans

作者: B. J. McFadyen , H. Carnahan

DOI: 10.1007/PL00005659

关键词:

摘要: The control of locomotion has been studied from various perspectives related to the tasks pattern generation, equilibrium or adaptation environment. last these locomotor components received comparably less attention, specifically pertaining anticipatory adjustments. Continuing work which conducted on both humans and cats, present paper explores nature differences in adjustments for obstacle avoidance versus accommodation level changes. Six subjects walked six different environments including no obstructions, a simple obstacle, two changes (a platform stairs), combination an with each respective change. Full dynamic analyses allowed comparison muscle torques as well power generated absorbed at lower limb joints across conditions. It was found that previously shown robust reorganization characterized by knee flexor generation strategy upheld all conditions when present. Pure involved augmentation ongoing hip inherent normal walking. In compound environment obstructed changes, chose combine active flexion. results are discussed point view general principles mechanical coordination exploitation intersegmental dynamics foot transport.

参考文章(27)
V E Belen'kiĭ, V S Gurfinkel, E I Pal'tsev, Control elements of voluntary movements Biofizika. ,vol. 12, pp. 135- 141 ,(1967)
Aftab E. Patla, Visual Control of Human Locomotion Adaptability of Human Gait - Implications for the Control of Locomotion. ,vol. 78, pp. 55- 97 ,(1991) , 10.1016/S0166-4115(08)60738-4
Otto Fischer, Wilhelm Braune, The Human Gait ,(1987)
L. M. Nashner, Balance adjustments of humans perturbed while walking Journal of Neurophysiology. ,vol. 44, pp. 650- 664 ,(1980) , 10.1152/JN.1980.44.4.650
H. FORSSBERG, S. GRILLNER, J. HALBERTSMA, The locomotion of the low spinal cat. I. Coordination within a hindlimb. Acta Physiologica Scandinavica. ,vol. 108, pp. 269- 281 ,(1980) , 10.1111/J.1748-1716.1980.TB06533.X
B.J. McFadyen, G.A. Magnan, J.P. Boucher, Anticipatory locomotor adjustments for avoiding visible, fixed obstacles of varying proximity ☆ Human Movement Science. ,vol. 12, pp. 259- 272 ,(1993) , 10.1016/0167-9457(93)90019-L