• Journal of neurosurgery · Oct 2003

    Effect of ipsilateral subthalamic nucleus lesioning in a rat parkinsonian model: study of behavior correlated with neuronal activity in the pedunculopontine nucleus.

    • Mi Fa Jeon, Yoon Ha, Yoon Hee Cho, Bae Hwan Lee, Yong Gou Park, and Jin Woo Chang.
    • Department of Neurosurgery, Medical Research Center, Brain Korea 21 Project for Medical Science and Brain Research Institute, Yonsei University College of Medicine, Seoul, Korea.
    • J. Neurosurg. 2003 Oct 1;99(4):762-7.

    ObjectThe purpose of this study was to investigate the spontaneous behavioral changes and the alteration of neuronal activities in the pedunculopontine nucleus (PPN) after ipsilateral subthalamic nucleus (STN) lesioning by kainic acid in a rat parkinsonian model created by lesioning with 6-hydroxydopamine (6-OHDA).MethodsAssumptions about the mechanisms mediating the effects of lesioning of the nigrostriatal dopaminergic pathway by 6-OHDA and the effects of STN lesioning were examined behaviorally by means of apomorphine-induced rotational behavior and forepaw-adjusting steps. The authors subsequently investigated the alteration of neuronal activities in the PPN to compare them with the behavioral changes in rat parkinsonian models.ConclusionsThe results demonstrated that STN lesioning induced behavioral improvement in rat parkinsonian models. This result, which confirms previously held assumptions, may account for the therapeutic effect of STN stimulation in Parkinson disease. The alteration of the neuronal activities in the PPN units also indicates that the PPN units are responsible for the improvement in motor symptoms observed after STN lesioning in rat parkinsonian models.

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