Apart from perhaps proctalgia or rectal pain, chronic constipation or diarrhea are the most common symptoms of bowel dysfunction seen in the PPOD syndrome patient.  When part of the PPOD syndrome, these two symptoms reflect dichotomous states of neurologic dysfunction caused by an underlying mechanical disorder of the spine.  In the case of constipation there is usually a reduction of the activity (inhibition) of the sensory and/or motor fibers that connect to and mediate control of the function of the large bowel and rectum.  Continue reading… Chronic Constipation – Chronic Diarrhea