Why is it important to use bony landmarks and proper positioning for measuring ROM? What is the purpose of the "test position" for MMT? What is the relevance of the gravity eliminated position?
It is important to use bony landmarks for measuring ROM in order to line goniometer up at correct joint. You want to make sure this is correct also for other therapists who may have to complete ROM for accuracy. Proper positioning is important for measuring ROM because you want the position that is going to allow for the most adequate and accurate measurement. Due to some people's physical incapabilities, positions are going to have to be modified for that individual. The purpose of the "test position" for MMT is due to the fact that most of our ADLs are completed in the direction against gravity. The test is done with the joint placed in midrange because the allows for the greatest contraction due to the greatest amount of cross-bridges forming here. The relevance of the gravity eliminated position is that it allows the movement to be parallel to the ground for individuals who cannot reach full ROM due to weakness, injury, etc.
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