The aim of this study was to determine whether the disorders of micturition that occur in patients with tabes dorsalis can be attributed exclusively to disturbed bladder sensation, as has been previously suggested. Urodynamic studies were performed in 8 patients with tabes dorsalis who had no obvious organic obstructive urological disease. The results indicated that not only disturbed bladder sensation but also suprasacral and/or sacral lesions innervating the detrusor could be responsible for voiding dysfunction in such patients.