Results 251 to 260 of about 6,169,517 (301)

Neuronal mechanisms of human locomotion

Journal of Neurophysiology, 1979
1. The surface electromyogram (EMG) of human leg muscles was recorded during running at different speeds; The EMG was compared with the simultaneously recorded vertical force exerted by the foot and with the angle of the ankle joint. 2. During running, the electrical activity of the gastrocnemius muscle increased sharply 35--45 ms after ground contact
V, Dietz, D, Schmidtbleicher, J, Noth
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Trunk movements in human locomotion

Acta Physiologica Scandinavica, 1984
Trunk movements in the frontal and sagittal planes were studied in 10 healthy males (18–35 yrs) during normal walking (1.0–2.5 m/s) and running (2.0–6.0 m/s) on a treadmill. Movements were recorded with a Selspot optoelectronic system. Directions, amplitudes and phase relationships to the stride cycle (defined by the leg movements) were analyzed for ...
A, Thorstensson, J, Nilsson, H, Carlson, M R, Zomlefer   +3 more
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Muscle Coordination and Locomotion in Humans

Current Pharmaceutical Design, 2017
Locomotion is a semi-automatic daily task. Several studies show that muscle activity is fairly stereotyped during normal walking. Nevertheless, each human leg contains over 50 muscles and locomotion requires flexibility in order to adapt to different conditions as, for instance, different speeds, gaits, turning, obstacle avoidance, altered gravity ...
Sylos Labini, F, Zago, M, Guertin, Pa, LACQUANITI, FRANCESCO, Ivanenko, Yp   +4 more
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Measurement of Human Locomotion

2000
The importance of measurements to properly assess human locomotion is increasingly recognized. Already well established as an experimental scientific research tool, human locomotion measurements are frequently a routine clinical application. Fields of application encompass both healthy and pathological locomotion encountered in rehabilitation medicine,
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Human locomotion

, 2010
Most purposeful, complex movements are programmed in the central nervous system (CNS) and adapted by proprioceptive feedback. The selection of and interaction between different sources of afferent input is task dependent.
V. Dietz, Dietz, V, Volker Dietz
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On the nonholonomic nature of human locomotion

Autonomous Robots, 2008
In the kinematic realm, wheeled robot's determining characteristic lies in its nonholonomic constraint. Indeed, the wheels of the robot unequivocally force the robot vehicle to move tangentially to its main axis. Here we test the hypothesis that human locomotion can also be partly described by such a nonholonomic system.
Gustavo Arechavaleta, Jean-Paul Laumond, Halim Hicheur, Alain Berthoz   +3 more
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Biomechanics of human locomotion in the wind

Journal of Applied Physiology
This is the first study to assess the biomechanical adaptations to a wide range of wind speeds inside a wind tunnel. Humans increase their mechanical work and alter their drag area ( Cd A) by adapting their posture when walking and running against increasing head and tailwinds.
Raphael M. Mesquita, Patrick A. Willems, Giovanna Catavitello, Giuseppe Gibertini, Valentina Natalucci, Francesco Luciano, Alberto Enrico Minetti, Gaspare Pavei, Arthur H. Dewolf   +8 more
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Modelling Human Locomotion

Sports Medicine, 2001
Mathematical models of performance in locomotor sports are reducible to functions of the sort y = f(x) where y is some performance variable, such as time, distance or speed, and x is a combination of predictor variables which may include expressions for power (or energy) supply and/or demand. The most valid and useful models are first-principles models
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Locomotion of human polymorphonuclear leucocytes

Experimental Cell Research, 1972
Abstract The locomotion of human polymorphonuclear leucocytes (PMN) cultured on glass slides in the presence and absence of chemotactic attractant was studied using high magnification cinemicrography. Views from above and the side indicate that PMN move by extending onto the substratum a lamellipodium into which the cellular contents flow.
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Adiabatic transformability hypothesis of human locomotion

Biological Cybernetics, 1996
It is hypothesized that metabolic and mechanical changes in human locomotion associated with changes in speed v are constrained by two attractive strategies: Qmetab = 1 and delta Qmetab/delta v = a positive definite constant. Qmetab = delta Eks-1/ml O2s-1 where delta Eks-1 is the summed increments and decrements per unit time in the translational and ...
Michael T. Turvey, Kenneth G. Holt, J. P. Obusek, A. Salo, Peter N. Kugler   +4 more
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