How to muscle test lower traps supine and prone?
Supine: Humerus is abducted135d with elbow locked. Place hand on posterior forarm superior to the wrist. Resist downward movement.
Prone:Humerus is abducted 135d with elbow locked. Place one hand on anterior forearm superior to the wrist to support the arm, and the other on the posterior forearm superior to the wrist, Resist upward movement gently!