Summary: A scientific study is being done to test a special treatment for people who have spasticity or tight muscles. This treatment is called stereotactic radiosurgery dorsal rhizotomy. It uses very accurate beams of radiation to target certain nerves in the back to help loosen up the muscles. In this study, people are put into two groups by chance: one group gets the real treatment, and the other group ...

Summary: Trigeminal neuralgia (TGN) is a debilitating pain syndrome where electrical, shock- like jolts of pain affect the face. Trigeminal somatosensory evoked potentials (TSEPs) provide a promising modality for measuring the trigeminal sensory and nociceptive pathway by using peripheral stimulation of the trigeminal nerve (on the skin) and measuring low latency evoked potentials on the scalp (contralater...

Summary: The study intervention is to perform standard somatosensory evoked responses limited to the face during rhizotomy procedures of the gasserian ganglion (trigeminal ganglion) for the treatment of trigeminal neuralgia. The evoked responses will be measured at two locations before and after the clinical rhizotomy including: the standard contralateral scalp (EEG) and at the gasserian ganglion through a...

Summary: Little is known about the peripheral and central mechanisms of action of selective dorsal rhizotomy surgery for the treatment of spasticity. A better understanding of these mechanisms will enable us to improve the surgical procedure. This will require cortico-medullo-radiculo-muscular recordings never before performed and published in the literature, and the identification of variations in connect...

Summary: The purpose of this study is to characterize the cortical connectivity changes in the brain of spastic diplegic children after Selective Dorsal Rhizotomy.

Summary: The main purpose of this study is to investigate the medium to long-term outcomes (3-10 years) after Selective Dorsal Rhizotomy (SDR) in ambulatory children and young people with cerebral palsy. The participants will complete a survey, come to hospital for some measurements and tests. Some parents and children and young people will also be invited to take part in an interview to understand their e...