Importance of body sway velocity information in controlling ankle extensor activities during quiet stance.
- K. Masani, M. Popovic, K. Nakazawa, M. Kouzaki, D. Nozaki
- BiologyJournal of Neurophysiology
- 1 December 2003
The findings suggest that the actual postural control system during quiet stance adopts a control strategy that relies notably on velocity information and that such a controller can modulate muscle activity in anticipatory manner without using a feed-forward mechanism.
Controlling balance during quiet standing: proportional and derivative controller generates preceding motor command to body sway position observed in experiments.
- K. Masani, A. Vette, M. Popovic
- BiologyGait & Posture
- 1 February 2006
Alternate muscle activity observed between knee extensor synergists during low-level sustained contractions.
- M. Kouzaki, M. Shinohara, K. Masani, H. Kanehisa, T. Fukunaga
- BiologyJournal of applied physiology
- 1 August 2002
It is demonstrated that alternate muscle activity in the quadriceps muscle appears only between biarticular RF muscle and monoarticular vasti muscles (VL and VM), and its frequency of alternations progressively increases with time, and emerges under sustained contraction with force production levels < or =5.0% of MVC.
Spatially distributed sequential stimulation reduces fatigue in paralyzed triceps surae muscles: a case study.
- R. Nguyen, K. Masani, S. Micera, M. Morari, M. Popovic
- EngineeringArtificial Organs
- 1 December 2011
Reducing fatigue is investigated by sequentially changing, pulse by pulse, the area of stimulation using multiple surface electrodes that cover the same area as one electrode during conventional stimulation to address muscle fatigue.
Reciprocal angular acceleration of the ankle and hip joints during quiet standing in humans
- Y. Aramaki, D. Nozaki, K. Masani, Takeshi Sato, K. Nakazawa, H. Yano
- PhysicsExperimental Brain Research
- 1 February 2001
The angular displacement, velocity, and acceleration of the hip were found to be significantly greater than those of the ankle, confirming that hip-joint motion cannot be ignored, even during quiet standing.
Larger center of pressure minus center of gravity in the elderly induces larger body acceleration during quiet standing
- K. Masani, A. Vette, M. Kouzaki, H. Kanehisa, T. Fukunaga, M. Popovic
- EducationNeuroscience Letters
- 18 July 2007
Difference in aftereffects following prolonged Achilles tendon vibration on muscle activity during maximal voluntary contraction among plantar flexor synergists.
- J. Ushiyama, K. Masani, M. Kouzaki, H. Kanehisa, T. Fukunaga
- BiologyJournal of applied physiology
- 1 April 2005
Results demonstrated that prolonged vibration-induced MVC suppression was attributable mainly to the reduction of muscle activity in MG and LG, both of which have a larger proportion of fast-twitch muscle fibers than Sol, which suggests that Ia-afferent activity that reinforces the recruitment of high-threshold motor units is necessary to enhance force exertion during MVC.
Acute effects of whole body vibration during passive standing on soleus H-reflex in subjects with and without spinal cord injury
- D. Sayenko, K. Masani, M. Alizadeh-Meghrazi, M. Popovic, B. C. Craven
- Biology, MedicineNeuroscience Letters
- 20 September 2010
Variability of ground reaction forces during treadmill walking.
- K. Masani, M. Kouzaki, T. Fukunaga
- BiologyJournal of applied physiology
- 1 May 2002
The results suggest that there is "an optimum speed" for the neuromuscular locomotor system but only for the propulsion control mechanism.
Cardiovascular response to functional electrical stimulation and dynamic tilt table therapy to improve orthostatic tolerance.
- L. Chi, K. Masani, M. Popovic
- MedicineJournal of Electromyography & Kinesiology
- 1 December 2008
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