FACIAL PAIN: A 21st CENTURY GUIDE For People with Trigeminal Neuralgia Neuropathic Pain 3.4 Radiofrequency Rhizotomy Dr. Harry Van Loveren, Neurosurgeon Percutaneous stereotactic radiofrequency rhizotomy (PSR), developed by Dr. William H. Sweet, produces a controlled injury to the trigeminal nerve and is therefore able to trade numbness for relief of TN pain. It does so…