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> Is a degree of > dementia/cognitive problems an eliminating factor? Generally, signs of dementia in PArkinson patients, excludes them from a surgical treatment. However, also slight demented Parkinson patients may have severe motor problems. Thusfar, as far as I am aware of, there is no data on the results of DBS in demented PD patients. My feeling is that they will respond just as well as the non-demented patients with regard to motor disturbances. We have to be careful however to start including demented patients; before we know we are not treating the patients, but the family, who insist on an operation. Greetings, Chris