Differential neuronal activity in segments of globus pallidus in Parkinson's disease patients

Neuroreport. 1994 Jul 21;5(12):1533-7. doi: 10.1097/00001756-199407000-00031.


Microelectrode trajectories through the globus pallidus of 6 Parkinson's disease (PD) patients yielded neurophysiological 'landmarks' which enabled the identification of neurones located in the external segment (GPe) and internal segments, exterior (GPi,e) and interior (GPi,i) of globus pallidus and the surrounding borders (Bor). Firing rate histograms and inter-spike interval time histograms were constructed for neurones in each region. The neuronal activity in GPi,i was higher than in the other segments, and a high degree of bursting was found in GPe and GPi neurones. This profile of neuronal activity is similar to that observed in monkeys treated with MPTP, suggesting that the observed level of activity of neurones in GPi,i is excessive, and contributes to the bradykinesia and rigidity of PD patients.

Publication types

  • Clinical Trial
  • Research Support, Non-U.S. Gov't

MeSH terms

  • Aged
  • Animals
  • Electric Stimulation
  • Female
  • Globus Pallidus / pathology
  • Globus Pallidus / physiopathology*
  • Haplorhini
  • Humans
  • Male
  • Microelectrodes
  • Middle Aged
  • Neurons / pathology
  • Neurons / physiology*
  • Parkinson Disease / pathology
  • Parkinson Disease / physiopathology*
  • Parkinson Disease, Secondary / physiopathology
  • Time Factors
  • Visual Pathways / physiopathology