In order to generate skilled and efficient actions, the motor system must find solutions to
several problems inherent in sensorimotor control, including nonlinearity, nonstationarity …

A stiffness control model for the stabilization of sway has been proposed recently. This paper
discusses two inadequacies of the model: modeling and empiric consistency. First, we show …

An active ankle-foot orthoses (AAFO) is presented where the impedance of the orthotic joint
is modulated throughout the walking cycle to treat drop-foot gait. During controlled plantar …

The notion of joint stiffness as commonly studied in biomechanics and motor control is
compared with the physical definition of stiffness. The importance of elastic deformation and …

When humans hop in place or run forward, they adjust leg stiffness to accommodate
changes in stride frequency or surface stiffness. The goal of the present study was to …

When humans hop in place or run forward, leg stiffness is increased to offset reductions in
surface stiffness, allowing the global kinematics and mechanics to remain the same on all …

Methods Ten male sprinters ran at the constant relative speeds of 70, 80, 90, and 100% over
a force platform, and ground reaction forces, kinematic, and EMG parameters were …

In order to identify useful guidelines for the clinical practitioner as regards the use of static
posturographic analysis, we collected a set of posrurograms from 3 groups of participants …

The non-disabled human ankle joint was examined during walking in an attempt to
determine overall system characteristics for use in the design of ankle prostheses. The …

Ferris, Daniel P., and Claire T. Farley. Interaction of leg stiffness and surface stiffness during
human hopping. J. Appl. Physiol. 82 (1): 15–22, 1997.—When mammals run, the overall …