Score: Gilbert shoulder classification
Use: Brachial plexus injury
Grade 0
Complete flail shoulder
Grade 1 (poor)
Abduction equal to 45°, with no active external rotation
Grade 2 (fair)
Abduction of less than 90°, with no external rotation
Grade 3 (satisfactory)
Abduction equal to 90°, with weak external rotation
Grade 4 (good)
Abduction of less than 120°, with incomplete external rotation
Grade 5 (excellent)
Abduction of greater than 120°, with active external rotationReference
http://emedicine.medscape.com/article/317057-treatment