music is very commonly used for relaxation and probably acts by activation of parasympathetic nervous system. what is its effect on the return of bowel motility in a post laparotomy patient?
May I suggest looking up music therapy and its affect on the biological systems? PNI (Psychoneuroimmunology) may also be relevant. I will be looking these up myself, specific to your question, but I do believe that there is a huge affect and even healing with music and the body and mind.