The doctor just looked at my winging scapula and said it was the long thoracic nerve. He then did an EMG (he said it was difficult to test the LTN, but possible). The EMG showed nothing unusual.

As I understood, the surgery is to decompress and repair the nerve, but one must know for sure where it is injured/compressed because the nerve is long as its name implies.

I still don't know if I have a problem with that nerve. My serratus anterior is definitely weak on both sides. But it may simply be weak due to imbalance...