Network perspectives on the mechanisms of deep brain stimulation

  • McIntyre C
  • Hahn P
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Abstract

Deep brain stimulation (DBS) is an established medical therapy for the treatment of movement disorders and shows great promise for several other neurological disorders. However, after decades of clinical utility the underlying therapeutic mechanisms remain undefined. Early attempts to explain the mechanisms of DBS focused on hypotheses that mimicked an ablative lesion to the stimulated brain region. More recent scientific efforts have explored the wide-spread changes in neural activity generated throughout the stimulated brain network. In turn, new theories on the mechanisms of DBS have taken a systems-level approach to begin to decipher the network activity. This review provides an introduction to some of the network based theories on the function and pathophysiology of the cortico-basal-ganglia-thalamo-cortical loops commonly targeted by DBS. We then analyze some recent results on the effects of DBS on these networks, with a focus on subthalamic DBS for the treatment of Parkinson's disease. Finally we attempt to summarize how DBS could be achieving its therapeutic effects by overriding pathological network activity. © 2009 Elsevier Inc.

Author-supplied keywords

  • Depression
  • Dystonia
  • Epilepsy
  • Essential Tremor
  • Neuromodulation
  • Neurostimulation
  • Obsessive Compulsive Disorder
  • Parkinson's Disease
  • Tourette's Syndrome

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Authors

  • Cameron C. McIntyre

  • Philip J. Hahn

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