Since it is well known that breast cancer patients experience an important load of stress from diagnosis through treatment and throughout cancer survivorship (fear of cancer recurrence), this study focusses on activation the parasympathetic nervous system and making patients as comfortable as possible during treatment. The scope of this study is based on previous research, that has shown that controlling physical and psychological complications during treatment may have a positive (preventive) effect on late term and long-term quality of life and survival outcomes. Breast cancer patients will receive andullation during their irradiation period. The primary outcome measure of the autonomic nervous system is vagal nerve activity, a modulator of the parasympathetic nervous system. Secondary outcome measures are stress, pain and lymphedema.
