Biomechanics Blog 2

Proper positioning and bony landmarks are an essential piece to measuring ROM. Bony landmarks indicate where to place the goniometer which will measure the range of motion of the joint. As future clinicians, we want to be sure that we can palpate the bony landmarks and measure the ROM correctly to improve intrarater and interrater reliability. Not only do we want to provide accurate measurements if we are working with a client again the next time, but we want another therapist to get corresponding measurements if they are to do the same test. 

The purpose of the “test position” for manual muscle testing is to try and facilitate the greatest contraction against gravity or in the gravity eliminated state. Manual muscle testing measures muscle strength in mid-range. Manual muscle testing helps the therapist to determine the weak muscles that may cause the client trouble with posture, their daily schedule, and lead to compensatory movements.

The gravity eliminated position is important because it helps a client participate who may be too weak for manual muscle testing against gravity. The desired movement of the client is parallel to the ground and all resistance is removed. This is relevant to us as future clinicians because we want to be able to accurately test all clients, even if they do not score high enough to manual muscle test against gravity. This will help us to better treat them and form a treatment plan more tailored specifically for that client.