Measuring ROM and MMT

Locating bone landmarks and positioning are very important when measuring range of motion.  Using the same location provides reliability and validity when repeating the measurement.  The bone landmarks provide a point to position the center of the goniometer and also where to position the stationary and moving arm of the goniometer.  Positioning the person is also important because it allows them to have full available range of motion without any unnecessary obstructions.  

The purpose of the test position for MMT is so that the muscles have optimal contraction. The position allows for the maximum amount of myosin and actin to be used in the muscle.  The MMT also allows the OT to position themselves in a position to apply force needed to test the person.  The gravity eliminated position is used when the person cannot produce much force against gravity itself.  Placing someone in the GE position allows them to move in a motion parallel to the ground which take gravity out of the equation.  This allows you to be able to rate the person based on their performance in this position.