hi well come to hcm
Usually it can be diagnosed clinically as well.If at all you are intereste in gettin investi
getting it you may submit her for X-cervical spine
and EMG[Electro myography}.As far
as Erbs palsy
is concerned physio therapy is best trearment.So if you wish You may
continue with physitherapy and wait for the out come.
Thanks Better luck