Experimental design: Prospective multicentre study in 36 SCI patients (24 treatment subjects, 12 control subjects). EPS will be started either within 10 days after SCI (early stim group) or after cessation of spinal shock (late stim group). Effects on spastic bladder function and autonomic disinhibition will be assessed by urodynamics, vegetative tests, and by electrophysiological techniques.