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Ann Neurol. 2005 Mar;57(3):448-52.

Subthalamic stimulation activates internal pallidus: evidence from cGMP microdialysis in PD patients.

Author information

1
Instituto di Ricovero e Cura a Carrattere Scientificio (IRCCS) Fondazione Santa Lucia, Via Ardeatina 306, 00179 Rome, Italy.

Abstract

Parkinson's disease patients benefit from deep brain stimulation (DBS) in subthalamic nucleus (STN), but the basis for this effect is still disputed. In this intraoperative microdialysis study, we found elevated cGMP extracellular concentrations in the internal segment of the globus pallidus, despite negligible changes in glutamate levels, during a clinically effective STN-DBS. This supports the view that a clinically beneficial effect of STN-DBS is paralleled by an augmentation (and not an inactivation) of the STN output onto the GPi.

PMID:
15732123
DOI:
10.1002/ana.20402
[Indexed for MEDLINE]

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