hi, thank-you for providing the brief history of you. It is sad to hear that a big object fell on your shoulder directly. I hope there is no burns to a greater extent. God bless us all. Coming to your query. you have damaged the rotator cuff muscles and the nerve as well. Now first thing we need a thorough deep neuromuscular assessment of the injured area. What is the status of the motor movements and also the sensation in the area and beneath it. To understand this better a Neuromuscular assessment will help to figure out the possibility of the regaining of the motor and sensory functions. Understanding that the healing of the nerve depends on the grade of the nerve injury. Also, by understanding the NCV test we can still estimate the possible causes and benefits to achieve by exercises. How is the rotator cuff status? are you having a good mobility now or it is stiff shoudler now? without having a thorough assessment it will be a blind comment which is possible. undergoing physical therapy will help improve the nerve by electrical stimulation and exercise. Regards Jay Indravadan Patel