During quiet standing the human ‘inverted pendulum’ sways irregularly. In previous work where subjects balanced a real inverted pendulum, we investigated what contribution the intrinsic mechanical ankle stiffness makes to achieve stability. Using the results of a plausible model, we suggested that intrinsic ankle stiffness is inadequate for providing stability. Here, using a piezo-electric translator we applied small, unobtrusive mechanical perturbations to the foot while the subject was standing freely. These short duration perturbations had a similar size and velocity to movements which occur naturally during quiet standing, and they produced no evidence of any stretch reflex response in soleus, or gastrocnemius. Direct measurement confir...
When standing, intrinsic ankle stiffness is smaller when measured using large perturbations, when sw...
Using short duration perturbations, previous attempts to measure the intrinsic ankle stiffness durin...
Using short duration perturbations, previous attempts to measure the intrinsic ankle stiffness durin...
During quiet standing the human ‘inverted pendulum’ sways irregularly. In previous work where subjec...
Ankle stiffness contributes to standing balance, counteracting the destabilizing effect of gravity. ...
In this study, we describe a device for the direct measurement of intrinsic ankle stiffness in quiet...
These experiments were prompted by the recent discovery that the intrinsic stiffness of the ankle is...
BACKGROUND AND AIM: To ensure upright balance the ankle joint stiffness must be sufficient to resist...
During human standing, tonic ankle extensor torque is required to support the centre of mass (CoM) f...
A stiffness control model for the stabilization of sway has been proposed recently. This paper discu...
A stiffness control model for the stabilization of sway has been proposed recently. This paper discu...
From a biomechanical point of view quiet standing can be described as the motion of a human inverted...
A stiffness control model for the stabilization of sway has been proposed recently. This paper discu...
Ankle stiffness is a nonlinear, time-varying system which contributes to the control of human uprigh...
Maintenance of upright, human balance is neurologically and biomechanically a complex process, thoug...
When standing, intrinsic ankle stiffness is smaller when measured using large perturbations, when sw...
Using short duration perturbations, previous attempts to measure the intrinsic ankle stiffness durin...
Using short duration perturbations, previous attempts to measure the intrinsic ankle stiffness durin...
During quiet standing the human ‘inverted pendulum’ sways irregularly. In previous work where subjec...
Ankle stiffness contributes to standing balance, counteracting the destabilizing effect of gravity. ...
In this study, we describe a device for the direct measurement of intrinsic ankle stiffness in quiet...
These experiments were prompted by the recent discovery that the intrinsic stiffness of the ankle is...
BACKGROUND AND AIM: To ensure upright balance the ankle joint stiffness must be sufficient to resist...
During human standing, tonic ankle extensor torque is required to support the centre of mass (CoM) f...
A stiffness control model for the stabilization of sway has been proposed recently. This paper discu...
A stiffness control model for the stabilization of sway has been proposed recently. This paper discu...
From a biomechanical point of view quiet standing can be described as the motion of a human inverted...
A stiffness control model for the stabilization of sway has been proposed recently. This paper discu...
Ankle stiffness is a nonlinear, time-varying system which contributes to the control of human uprigh...
Maintenance of upright, human balance is neurologically and biomechanically a complex process, thoug...
When standing, intrinsic ankle stiffness is smaller when measured using large perturbations, when sw...
Using short duration perturbations, previous attempts to measure the intrinsic ankle stiffness durin...
Using short duration perturbations, previous attempts to measure the intrinsic ankle stiffness durin...