painful shoulder and motor control

hi friends
i am planning to do a study on motor control dysfunction in painful shoulder subjects.thinking of using dynamic rotator stability test described by mark jones and mary e magarey in manal therap 2003,to detect motor control of g-h joint.i think there will be alterations in motor control both in acute and chronic cases.i need everybodys valuable suggestions and informations regarding the same.

Please keep this updated, I am very interested in seeing this progress..
What are you doing exactly, a projecT?

I weight lift. As a weightlifter and concurrent information provided by my instructor, weight lifters usually have massive instability in the GH joint due to incorrect muscle activation during heavy weight lifting.

Please provide more details