Effect of Subthalamic Nucleus Stimulation during Exercise on the Mesolimbocortical Dopaminergic Region in Parkinson'S Disease: A Positron Emission Tomography Study. Issue 3 (March 2013)

• Record Type: Journal Article
• Authors: Nozaki, Takao; Sugiyama, Kenji; Yagi, Shunsuke; Yoshikawa, Etsuji; Kanno, Toshihiko; Asakawa, Tetsuya; Ito, Tae; Terada, Tatsuhiro; Namba, Hiroki; Ouchi, Yasuomi
• Is Part Of: Journal of cerebral blood flow & metabolism. Volume 33:Issue 3(2013)
• Page Start: 415
• Page End: 421
• Publication Date: 2013-03
• Subjects: caudate -- dopamine release -- nucleus accumbens -- Parkinson's disease -- positron emission tomography -- subthalamic nucleus stimulation; Cerebral circulation -- Periodicals; Brain -- Metabolism -- Periodicals; Brain -- Blood-vessels -- Periodicals; Cerebrovascular disease -- Periodicals; 612.824
• DOI: 10.1038/jcbfm.2012.183
• Languages: English
• ISSNs: 0271-678X

Abstract

To elucidate the dynamic effects of deep brain stimulation (DBS) in the subthalamic nucleus (STN) during activity on the dopaminergic system, 12 PD patients who had STN-DBS operations at least 1 month prior, underwent two positron emission tomography scans during right-foot movement in DBS-off and DBS-on conditions. To quantify motor performance changes, the motion speed and mobility angle of the foot at the ankle were measured twice. Estimations of the binding potential of [ 11 C]raclopride (BPND ) were based on the Logan plot method. Significant motor recovery was found in the DBS-on condition. The STN-DBS during exercise significantly reduced the [ 11 C]raclopride BPND in the caudate and the nucleus accumbens (NA), but not in the dorsal or ventral putamen. The magnitude of dopamine release in the NA correlated negatively with the magnitude of motor load, indicating that STN-DBS facilitated motor behavior more smoothly and at less expense to dopamine neurons in the region. The lack of dopamine release in the putamen and the significant dopamine release in the ventromedial striatum by STN-DBS during exercise indicated dopaminergic activation occurring in the motivational circuit during action, suggesting a compensatory functional activation of the motor loop from the nonmotor to the motor loop system.