I only have the jaw problems and have not had any muscle related problems in the neck area where they did the ND. I can't stretch the neck as far on that side and it can be stiff some days, but other than that, no cramping in the neck.
Jim
T3N2aM0 SCC right oral tongue. Partial Glosectomy, Modified Neck disection for 1 Lymph Node. Dec. 2002. 35 IMRT 2003.