Replacement of dopaminergic medication with subthalamic nucleus stimulation in Parkinson's disease: long-term observation

Luigi Michele Antonio Romito, Maria Fiorella Contarino, Nicola Vanacore, Anna Rita Bentivoglio, Massimo Scerrati, Alberto Albanese

Risultato della ricerca: Contributo in rivistaArticolo in rivistapeer review

66 Citazioni (Scopus)


Stimulation of the subthalamic nucleus (STN) is an effective treatment for advanced Parkinson's disease (PD), but the medication requirements after implant are poorly known. We performed a long-term prospective evaluation of 20 patients maintained at stable dopaminergic therapy for 5 years after bilateral STN implants, who were evaluated 6 months, 1 year, 3 years, and 5 years after surgery. We measured, during the entire observation period, the effect of deep brain stimulation on motor and functional outcome measures, the levodopa equivalent daily dose and the total electrical energy delivered. At 5 years, the UPDRS motor score had improved by 54.2% and levodopa equivalent dose was reduced by 61.9%, compared with preimplant. Dopaminergic medication remained stable during the observation period, but energy was progressively increased over time. Rest tremor, rigidity, gait, lower and upper limb akinesia, and total axial score were improved in decreasing order. Postural stability and speech improved transiently, whereas on-period freezing of gait, motor fluctuations and dyskinesias recovered durably. Functional measures did not show improvement in autonomy and daily living activities after STN implant. Chronic STN stimulation allows to replace for dopaminergic medications in the long-term at the expense of an increase of the total energy delivered. This is associated with marked improvement of motor features without a matching benefit in functional measures.
Lingua originaleEnglish
pagine (da-a)557-563
Numero di pagine7
RivistaMovement Disorders
Stato di pubblicazionePubblicato - 2009


  • Deep Brain Stimulation
  • Disability Evaluation
  • Dopamine Agents
  • Electrodes, Implanted
  • Female
  • Humans
  • Levodopa
  • Longitudinal Studies
  • Male
  • Motor Activity
  • Parkinson Disease
  • Severity of Illness Index
  • Subthalamic Nucleus
  • Time Factors
  • Treatment Outcome


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