I had an accident 3 years back. My back (vertebral column) bended backwards when I fell. Shortly after the fall I experienced tingling sensation in my feet accompanied by difficulty in walking. I was paralysed below my hip for 1 day with symptoms like leakage of urine and face. I recovered within� a day. ��� I felt a swelling in my back thereafter. The swelling subsided� and returned (when some stress was felt while sitting or bending) accompanied� by �* severe pain in back, �* radial pain from buttocks towards legs, �* bowel bladder dysfunction, �* sexual� dysfunction and decreased� sensation in saddle area. After a week of final episode everything recovered. But, "decreased� sensation in saddle area and sexual dysfunction" REMAINED . I consulted a doctor only 2 months ago. This is what he found: There is no fracture, lesion,disc herniation or neuroradicular compression of nerves or spine in lumbosacral MRI scan. EVERYTHING IS INTACT. The doctor says there is NO PROBLEM WITH MY BACK. � Yet I feel decreased sensitivity in my saddle area (inner buttocks, perineum and genitals) and problem in erection. Is it possible that I have some problem which is undetected in MRI?