Abstract. The situation of the usual bladder, prostate, membranous urethra channel, can vary, according to the morphology of the perineum which can be overstretched. A case of a young man with a TIO complete upper motor neurone lesion is presented. The normal anterior angulation at the prostate and membranous urethra junction was reduced anteriorly and pushed backwards, thus causing an added indirect factor of dysuria. The mechanism is discussed in comparison with other such late, but often overlooked con sequences of alterations of the pelvic floor during micturition.