The segmental and supraspinal innervation of the detrusor muscle and periurethral striated musculature was studied in 27 patients with diabetes mellitus by gas cystometry, integrated sphincter electromyography, and spinal evoked-response latency measurements. Slowing of neural conduction velocities was a consistent finding in all the patients, even when cystometry did not show abnormalities. Thus, neuropathy in the segmental innervation of the bladder and urethra was documented.

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