(Video: Treating Parkinson's disease: Deep brain electrode implantation) The surgery is successful in improving Dale's

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The video explains that the surgery involves implanting electrodes deep in the brain to regulate the nerve signals that control movement. Parkinson's disease causes tremors and difficulty with muscle control, so the surgery aims to improve these symptoms. There is no mention or indication that the surgery affects Dale's vision, hearing, or empathy.

(Video: Treating Parkinson's Disease: Deep Brain Electrode Implantation) the Surgery