The Motor Control Screen(MCS) is a stability test that gives you vital information on how you stabilize, balance and control your movement through single limb competency. The MCS is part of the Fundamental Capacity Screen.

The Motor Control Screen Slide Box is a critical piece of equipment that is needed in order to effectively collect the most accurate and reliable data. It was designed to be placed onto the FMS test kit for more efficient testing.

Slide Box Tutorial

https://www.functionalmovement.com/articles/Help/732/slide_box_tutorial