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angular motion is … motion about an …?
rotational, axis
what are the 3 units of measurements?
degrees, radians and rotations
what is a radian?
the size of the angle should subtended at the center of a circle by an arc equal to the radius
what are the two reference systems?
relative and absolute
what is a relevant joint angle?
measured relative to 2 adjacent segments
in anatomical position, all joint angles are …?
0 degrees
what are the three ways that we measure angles?
goniometer
inclinometer
video analysis
what are three reasons for abnormal readings on a joint angle graph?
injury
learning a new skill
chronic condition