Neuromotor Control and Modeling (Fach) / Motor Control (Lektion)
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M5
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- What is a reference system? A reference system is necessary to specify position of the body , segment or object. It consists of imaginary lines called axes. Common point of intersection is called origin. Origin of the reference frame is often placed at a designated location such as a joint center (but can also lie outside of the body). Position can be described by identifying the distance of the object along each of the axes. In two-dimensional or planar movement, two axes are require. In a three-dimensional movement, three axes are required.
- What is the difference between absolute and relative reference frame? An absolute reference frame: measures the segment angle with respect to the distal joint. A relative reference frame measures the relative angle formed by the two segments.