Neurosurgical interventions in a patient with cerebral palsy and spasticity include:

• Selective dorsal rhizotomy (SDR): section of sensory nerve roots disrupts the reflex arcs and decreases tone. This procedure does not affect dyskinesias.
• Peripheral neurectomy: this procedure can be used to manage spasticity in selective muscle groups (eg, obturator neurectomy in patients with hip adduction deformity).
• Myelotomy: a neurosurgical procedure that interrupts reflex arcs by surgically dividing the cord from T12 to S1 into ventral and dorsal portions. 
• Dorsal column electrical stimulation: stimulation of the dorsal columns by an epidural electrode can be used to decrease tone.