Background : In paraplegic and tetraplegic patients with suprasacral lesion, bladder overactivity leads to incontinence and is frequently associated with detrusor-sphincter dyssynergia which is responsible for residual postvoiding (high infectious risk) and intravesical high pressure (risk for kidney). The Brindley technique allows to restore a voluntary voiding of the bladder and an effective continence. Electrodes are fixed to anterior sacral roots in order to obtain micturition. Posterior sacral root rhizotomy suppress detrusor and sphincter overactivity, improves continence and thus protects bladder and kidney (low pressure bladder filling). Currently in France, 100 new patients could benefit from this innovative technique among the 1000 patients with spinal cord injury