The biped is to maintain stance and postural stability under support platform disturbance [14].
Ten non obese adults (BMI = 22.4±1.3, age = 42.4±15.1) and 10 obese adult patients (BMI = 35.2±2.8, age = 46.2±19.6) maintained postural stability on a force platform in two postural tasks (seated and unipedal).
Our objective is to concentrate on the sensory and control aspects of the biped and, specifically, its postural stability in reaction to the platform disturbance.
In this research three measurement protocols were used: the Postural Stability Test (PST) under two different conditions (stable platform, unstable platform level 8) and the Fall Risk Test (FRT) with eyes closed.
The postural stability was measured with a force platform, and general HRQoL measures were used.
The Biodex Balance System, used to assess postural stability, consists of a movable balance platform that provides up to 20° of surface tilt over a 360° range of motion.
For example, in the medical platform case, the platform is independently moved, and the objective of the human or patient on the platform is to achieve postural stability, even though the exact mechanisms of such control by the central nervous system (CNS) are not well understood.
Relevant postural stability parameters were measured on force platforms when patients were OFF and ON, either in quiet standing or when performing leaning tasks designed to stress postural stability.
To date, center of pressure (CoP) trajectories, as the vector of total force applied to the center of the supporting surface [9, 60], are measured by laboratory-based force or pressure-sensitive platforms in order to assess postural stability [12, 30, 47, 48].
The mean velocity of center-of-pressure time series obtained from the force platform was used to assess static postural stability.
Postural stability was evaluated with the help of a force platform (AMTI OR6-5-1 model).
