• Xiwen Geng, Xuenan Wang, Feng He, Xiao Zhang, Jinlu Xie, Guangheng Gao, Hongyu Han, Xiaomeng Yao, Haiyan Zhang, Yunfeng Gao, Yanan Wang, and Min Wang.
• Key Laboratory of Animal Resistance of Shandong Province, College of Life Science, Shandong Normal University, Jinan 250014, People's Republic of China; Shandong Traditional Chinese Medicine University, Jinan 250014, People's Republic of China. Electronic address: geng-xiwen@qq.com.
• Neuroscience. 2019 Apr 15; 404: 470-483.

AbstractThe pedunculopontine nucleus (PPN) shows altered electrophysiological and anatomic characteristics in Parkinson's disease (PD), but little is known about the effect of 6-hydroxydopamine (6-OHDA) lesion and levodopa (L-DOPA) therapy on the relationship between spike and local field potential (LFP) activities in the PPN and motor cortex. Aiming to investigate this, synchronous spike and LFP signals in the PPN and primary motor cortex (M1) were recorded. The spike-LFP relationship was evaluated using coherence analysis, phase-lock and spike-field coherence (SFC). The results suggested that 6-OHDA lesion had a significant effect on the spike-LFP relationship between the PPN and M1 in rats under a rest or locomotion state. The significantly altered frequency bands varied across different neuron types and animal activity states. In addition, the altered coherence values between PPN spike and M1 LFP were refractory to long-term L-DOPA therapy although all other changes could be reversed by this drug treatment. All results provided evidence of the spike-LFP relationship between the PPN and M1 in PD, revealing some network mechanisms of the cortico-basal ganglia circuitry and PPN, which might be an underlying candidate for PD pathophysiology and therapy.Copyright © 2019 IBRO. Published by Elsevier Ltd. All rights reserved.

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