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Low-frequency stimulation of the external globus palladium produces anti-epileptogenic and anti- ictogenic actions in rats
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Low-frequency stimulation of the external globus palladium produces anti-epileptogenic and anti- ictogenic actions in rats
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Low-frequency stimulation of the external globus palladium produces anti-epileptogenic and anti- ictogenic actions in rats
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Journal Article
Low-frequency stimulation of the external globus palladium produces anti-epileptogenic and anti- ictogenic actions in rats
2015
Overview
Aim： To investigate the anti-epileptic effects of deep brain stimulation targeting the external globus palladium （GPe） in rats. Methods： For inducing amygdala kindling and deep brain stimulation, bipolar stainless-steel electrodes were implanted in SD rats into right basolateral amygdala and right GPe, respectively. The effects of deep brain stimulation were evaluated in the amygdala kindling model, maximal electroshock model （MES） and pentylenetetrazole （PTZ） model. Moreover, the background EEGs in the amygdala and GPe were recorded. Results： Low-frequency stimulation （0.1 ms, 1 Hz, 15 min） at the GPe slowed the progression of seizure stages and shortened the after-discharge duration （ADD） during kindling acquisition. Furthermore, low-frequency stimulation significantly decreased the incidence of generalized seizures, suppressed the average stage, and shortened the cumulative ADD and generalized seizure duration in fully kindled rats. in addition, low-frequency stimulation significantly suppressed the average stage of MES-induced seizures and increased the latency to generalized seizures in the PTZ model. High-frequency stimulation （0.1 ms, 130 Hz, 5 min） at the GPe had no anti-epileptic effect and even aggravated epileptogenesis induced by amygdala kindling. EEG analysis showed that low-frequency stimulation at the GPe reversed the increase in delta power, whereas high-frequency stimulation at the GPe had no such effect. Conclusion： Low-frequency stimulation, but not high-frequency stimulation, at the GPe exerts therapeutic effect on temporal lobe epilepsy and tonic-colonic generalized seizures, which may be due to interference with delta rhythms. The results suggest that modulation of GPe activity using low-frequency stimulation or drugs may be a promising epilepsy treatment.
