Cortical evoked potentials of the vesicourethral junction--a predictor for the outcome of intravesical electrostimulation in patients with sensory and motor detrusor dysfunction.

The evaluation of cortical evoked potentials after stimulation of the vesicourethral junction shows accurate and reproducible results and offers an elegant technique for evaluation of the viscerosensory pathways in patients with lower urinary tract dysfunction. The results must be considered in context with the results of simultaneously investigated pudendal somatosensory evoked potentials and the clinical symptomatology. They are of great help (1) in differentiating between intraspinal and extraspinal lesions of the afferent pathways of the detrusor if the etiology is unknown, (2) in differentiating between neurogenic and myogenic damage to the urinary bladder, and (3) in selecting patients not suitable for intravesical electrotherapy for bladder rehabilitation.