Current experiments are utilizing epidural stimulation, and the measurement of numerous systems, after either sham transection or full T9 transection. Transected Wistar rats (male and female) are tested after 6 weeks of recovery. Initial mapping experiments have targeted the L6-S1 segment of the spinal cord for epidural stimulation. The testing paradigm subjects this segment of the spinal cord to combinations of frequency (5, 10, 30, 45, 60 Hz) and intensity (50, 75, 100, 150, 300, 500 \u03bcA) to determine the most effective stimulus parameters for efficient voiding. Endpoints include: rectal and distal colon pressure activity, external urethral sphincter electromyography (EUS EMG), external anal sphincter electromyography (EAS EMG), bulbospongiosus electromyography in males (bulbo EMG), bladder pressure changes, voiding and drop patterns, volume of voided fluid, and muscle movement thresholds. By recording these responses, and the changes due to stimulation, these experiments will provide insight into the best stimulus parameters to influence bladder activity after spinal cord injury.