Functional connectivity and integrative properties of globus pallidus neurons

D. Jaeger, Hitoshi Kita

Research output: Contribution to journalReview article

45 Citations (Scopus)

Abstract

The globus pallidus consists of the external (GPe) and the internal (GPi) segments. The GPe and GPi have different functional roles. The GPe is located centrally within multiple basal ganglia feedforward and feedback connections. The GPi is an output nucleus of the basal ganglia. A complex interplay between intrinsic pacemaking conductances and the balance of glutamatergic and GABAergic input largely determines the rate and pattern of firing of pallidal neurons. The initial part of this article introduces recent findings made in vivo that are related to the roles of glutamatergic and GABAergic inputs in the control of pallidal activity. The latter part describes the roles of intrinsic mechanisms of GPe neurons in the integration of the synaptic inputs. The presence of dendritic voltage-gated sodium channels may allow the initiation of dendritic spikes, giving distal inputs on the long and thin GPe dendrites an opportunity to strongly shape spiking activity. Basal ganglia disorders including Parkinson's disease, hemiballismus, and dystonias are accompanied by increased irregularity and synchronized bursts of pallidal activity. These changes may be in part due to changes in the GABA release in the GPe and GPi, but also involve intrinsic cellular changes in pallidal neurons.This article is part of a Special Issue entitled: Function and Dysfunction of the Basal Ganglia.

Original languageEnglish (US)
Pages (from-to)44-53
Number of pages10
JournalNeuroscience
Volume198
DOIs
StatePublished - Dec 15 2011

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Globus Pallidus
Neurons
Basal Ganglia
Basal Ganglia Diseases
Voltage-Gated Sodium Channels
Dystonia
Dyskinesias
Dendrites
gamma-Aminobutyric Acid
Parkinson Disease

All Science Journal Classification (ASJC) codes

  • Neuroscience(all)

Cite this

Functional connectivity and integrative properties of globus pallidus neurons. / Jaeger, D.; Kita, Hitoshi.

In: Neuroscience, Vol. 198, 15.12.2011, p. 44-53.

Research output: Contribution to journalReview article

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