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Body sway can occur in all planes of motion, which make it an increasingly difficult ability to rehabilitate. There is strong evidence in research showing that deficits in postural balance is related to the control of medial-lateral stability and an increased risk of falling.
The Razer Hydra, a motion controller for PC, tracks position and rotation of two wired nunchucks, providing six degrees of freedom on each hand. The SpaceOrb 360 is a 6DOF computer input device released in 1996 originally manufactured and sold by the SpaceTec IMC company (first bought by Labtec , which itself was later bought by Logitech ).
A pitch motion is an up-or-down movement of the bow and stern of the ship. The longitudinal/X axis, or roll axis, is an imaginary line running horizontally through the length of the ship, through its centre of mass, and parallel to the waterline. A roll motion is a side-to-side or port-starboard tilting motion of the superstructure around this ...
The sway of quiet standing is often likened to the motion of an inverted pendulum. [7] There are many mechanisms in the body that are suggested to control this movement, e.g. a spring action in muscles, higher control from the nervous system or core muscles.
When motion involving large displacements is the main objective of study (e.g. for analyzing the motion of satellites), a deformable body may be approximated as a rigid body (or even a particle) in order to simplify the analysis. The degree of freedom of a system can be viewed as the minimum number of coordinates required to specify a ...
Sway may be an element of both stationary and moving dance figures. In moving figures, sway is commonly achieved as a natural result of body swing, but small amounts from other sources may be useful as an inflection. Sway comes primarily from an incline of the entire body, but a portion may also come from gradual bending of the trunk.
Motion platforms can only reproduce the sensation of actual motion in the initial acceleration. It cannot be sustained because of the physical limits of the size of the motion platform. However, the motion sensors of the human body respond to accelerations rather that sustained motion, and so a motion platform can produce motion cueing.
The thunder clap is a form of dance that incorporates clapping in the air with a sliding motion. [citation needed] To perform this dance one must raise one hand and then with the second hand meet the first one half way making a clapping sound; that hand must then fully extend. This motion is repeated to the beat of the music.