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Parkinson's Disease: Treatment01:24

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Neurodegenerative disorders, such as Parkinson's Disease (PD), involve the gradual and irreversible destruction of neurons in particular brain areas. These disorders exhibit standard features like proteinopathies, selective vulnerability of some neurons, and an interaction of intrinsic properties, genetics, and environmental influences in neural injury.
Parkinson's Disease is primarily a result of the loss of dopaminergic neurons in the substantia nigra pars compacta. The cornerstone of...
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Deep Brain Stimulation Target Selection for Parkinson's Disease.

Christopher R Honey1, Clement Hamani2, Suneil K Kalia3

  • 11Division of Neurosurgery,University of British Columbia,Vancouver,British Columbia.

The Canadian Journal of Neurological Sciences. Le Journal Canadien Des Sciences Neurologiques
|March 16, 2016
PubMed
Summary

Deep brain stimulation (DBS) for Parkinson's disease (PD) offers effective motor symptom relief. Both subthalamic nucleus (STN) and globus pallidus internus (GPi) targets are equally beneficial, with STN aiding medication reduction and GPi helping with dyskinesia.

Keywords:
Parkinson’s diseasedeep brain stimulationglobus pallidus internusmovement disordermovement disorder surgerysubthalamic nucleussurgical targetventral intermediate nucleus

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Area of Science:

  • Neurology
  • Neurosurgery
  • Movement Disorders

Background:

  • Parkinson's disease (PD) is a progressive neurodegenerative disorder affecting motor function.
  • Deep brain stimulation (DBS) is a therapeutic option for advanced PD.
  • Optimal target selection for DBS in PD remains a subject of ongoing research and clinical debate.

Purpose of the Study:

  • To discuss and evaluate key questions regarding target selection for DBS in Parkinson's disease.
  • To compare the efficacy of subthalamic nucleus (STN) versus globus pallidus internus (GPi) as DBS targets.
  • To explore alternative DBS targets and optimal stimulation paradigms (unilateral vs. bilateral).

Main Methods:

  • Expert consensus discussion during the 'DBS Canada Day' symposium.
  • Review of current evidence on STN, GPi, ventral intermediate nucleus, posterior subthalamic area, and pedunculopontine nucleus targets.
  • Analysis of outcomes related to unilateral, bilateral, and staged bilateral DBS approaches for PD.

Main Results:

  • Both STN and GPi DBS are equally effective for improving PD motor symptoms.
  • STN DBS facilitates greater medication reduction, while GPi DBS offers direct antidyskinetic effects.
  • Ventral intermediate nucleus DBS is effective for tremor but less so for other PD motor features; posterior subthalamic area also reduces tremor; pedunculopontine nucleus is investigational. Unilateral DBS suits asymmetric patients, and staged bilateral DBS shows no proven benefit in reducing adverse events.

Conclusions:

  • STN and GPi are both effective targets for DBS in Parkinson's disease, offering distinct advantages.
  • Further research is needed for investigational targets like the pedunculopontine nucleus.
  • Current evidence supports unilateral DBS for asymmetric symptoms and does not validate staged bilateral approaches for safety.