-Twenty-three patients with Parkinson's disease underwent stereotactic surgery. To study the long-term motor performance, the patients were evaluated at the pre-operative period and at the 1 st , 3 rd , 6 th , and 12 th post-operative months, with the following scales: Unified Parkinson's Disease Rating Scale (UPDRS) motor score and Larsen's Scale for Dyskinesias. The patients under levodopa therapy were assessed both in "on" and "off" periods. Fourteen unilateral ventrolateral thalamotomies (VLT), 4 unilateral posteroventral pallidotomies (PVP), 2 bilateral PVP, and 3 VLT with contralateral PVP were performed. The motor improvement was significant and long-lasting in the "off" period, except for 2 patients. The "on" period quality improved, mainly due to the control of dyskinesias. The improvement of dyskinesias was long-lasting for the majority of the patients. There was no significant decrease in the levodopa dose. Three patients showed permanent complications, but none was severe.KEY WORDS: Parkinson's disease, thalamotomy, pallidotomy.Desempenho motor apĂłs palidotomia pĂłstero-ventral e talamotomia ventro-lateral na doença de Parkinson: acompanhamento de um ano RESUMO -Vinte e trĂȘs pacientes portadores de doença de Parkinson foram submetidos a cirurgia estereotĂĄxica para tratamento da doença. Com o objetivo de estudar o desempenho motor a longo prazo, os pacientes foram avaliados clinicamente no perĂodo prĂ©-operatĂłrio, no 1°, 3°, 6°, e 12° mĂȘs pĂłs-operatĂłrio, com as seguintes escalas: Escala Unificada para Doença de Parkinson (Unified Parkinson's Disease Rating Scale-UPDRS), item III, escore motor e com a Escala de Larsen para Discinesias. Os pacientes que utilizavam levodopa foram avaliados nos estados "off" e "on". Foram realizadas 14 talamotomias ventro-laterais (TVL) unilaterais, 4 palidotomias pĂłstero-ventrais (PPV) unilaterais, 2 PPV bilaterais; 3 TVL associadas Ă PPV contralateral. O benefĂcio motor foi observado de forma significante no estado "off", e manteve-se a longo prazo na maioria dos pacientes, exceto em 2. Houve melhora da qualidade do perĂodo "on", devido ao controle das discinesias. A melhora das discinesias se manteve a longo prazo na maioria dos pacientes. As cirurgias nĂŁo promoveram um decrĂ©scimo significante na dose de levodopa.TrĂȘs pacientes tiveram complicaçÔes permanentes, mas nenhuma delas foi considerada grave e nem houve prejuĂzo funcional importante em decorrĂȘncia das mesmas. PALAVRAS-CHAVE: doença de Parkinson, talamotomia, palidotomia.Levodopa remains the goldstandard treatment for patients with Parkinson's disease (PD). However, after some years, part of these patients develop complications related to the prolonged use of the drug, such as fluctuations and disabling dyskinesias 1 . In the absence of satisfactory pharmacological therapy, there has been a resurgence of interest for stereotactic surgery in the last