According to medical literature, spasticity is described as "disordered sensorimotor control arising from a UMN lesion." Nevertheless, spasticity is seldom seen on its own and is typically accompanied by other symptoms of the UMN syndrome. SDR is the main weapon in his or her arsenal. To assess the outcome of selective dorsal rhizotomy in the management of spastic patients and its degree. The research was conducted at the Department of Neurosurgery at Al-Zahraa Hospital and health insurance hospitals on 20 patients. Most cases (60%) had Ashworth scale 3, significantly higher than scale 1. Regarding gait classification, most of the cases (60%) had GMFCS scale 3, significantly higher than scale 1. Regarding causes of spasticity, most of the cases (90%) had CP, significantly higher than cases with spinal injury. Postoperative status was improved significantly in 60 % of cases. Back pain was significantly the most common complication in comparison to other complications. This study concluded that selective dorsal rhizotomy may be a good and safe option for the treatment of spasticity and may improve the condition of the spasticity among patients.