title: Optimizing a rodent model of Parkinson's disease for exploring the effects and mechanisms of deep brain stimulation.
abstract: Deep brain stimulation (DBS) has become a treatment for a growing number of neurological and psychiatric disorders, especially for therapy-refractory Parkinson's disease (PD). However, not all of the symptoms of PD are sufficiently improved in all patients, and side effects may occur. Further progress depends on a deeper insight into the mechanisms of action of DBS in the context of disturbed brain circuits. For this, optimized animal models have to be developed. We review not only charge transfer mechanisms at the electrode/tissue interface and strategies to increase the stimulation's energy-efficiency but also the electrochemical, electrophysiological, biochemical and functional effects of DBS. We introduce a hemi-Parkinsonian rat model for long-term experiments with chronically instrumented rats carrying a backpack stimulator and implanted platinum/iridium electrodes. This model is suitable for (1) elucidating the electrochemical processes at the electrode/tissue interface, (2) analyzing the molecular, cellular and behavioral stimulation effects, (3) testing new target regions for DBS, (4) screening for potential neuroprotective DBS effects, and (5) improving the efficacy and safety of the method. An outlook is given on further developments of experimental DBS, including the use of transgenic animals and the testing of closed-loop systems for the direct on-demand application of electric stimulation.
authors: Department of Neurology, University of Rostock, Gehlsheimer Straße 20, 18147 Rostock, Germany.
authors: Karl
authors: K
authors: Nowak
authors: Eilhard
authors: E
authors: Mix
authors: Jan
authors: J
authors: Gimsa
authors: Ulf
authors: U
authors: Strauss
authors: Kiran Kumar
authors: KK
authors: Sriperumbudur
authors: Reiner
authors: R
authors: Benecke
authors: Ulrike
authors: U
authors: Gimsa
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