Holly A Roy1, Tipu Z Aziz2, James J Fitzgerald2, Alexander L Green2. 1. From the Department of Functional Neurosurgery (H.A.R., T.Z.A., J.J.F., A.L.G.) and Nuffield Department of Surgical Sciences (H.A.R., T.Z.A., J.J.F., A.L.G.), John Radcliffe Hospital, Oxford; and Department of Neurosurgery (H.A.R.), Derriford Hospital, Plymouth, UK. roy.hollyann@gmail.com. 2. From the Department of Functional Neurosurgery (H.A.R., T.Z.A., J.J.F., A.L.G.) and Nuffield Department of Surgical Sciences (H.A.R., T.Z.A., J.J.F., A.L.G.), John Radcliffe Hospital, Oxford; and Department of Neurosurgery (H.A.R.), Derriford Hospital, Plymouth, UK.
Abstract
OBJECTIVES: To investigate the role of beta oscillations in urinary voiding and their association with lower urinary tract symptoms in Parkinson disease (PD). METHODS: We used surgically implanted deep brain stimulation electrodes to record local field potential signals from the subthalamic nucleus (STN) and globus pallidus interna (GPi) of patients with PD during urinary voiding. Five patients with STN electrodes and 5 patients with GPi electrodes were tested. We also explored correlations between beta oscillatory power and urinary symptoms assessed by the International Consultation on Incontinence Lower Urinary Tract Symptoms questionnaire. RESULTS: Beta suppression occurred during urinary voiding in the GPi (p < 0.05) but not the STN. Furthermore, the beta signal in the GPi during voiding correlated significantly with severity of incontinence and urinary frequency (p < 0.05). CONCLUSIONS: In this study, we have demonstrated that local field potentials can provide information about the neural control of the bladder. Our findings suggest that the GPi is implicated in the process of urinary voiding and that its mechanism of action is linked to signals in the beta frequency band. Moreover, our correlational analyses show that beta oscillations may be implicated more generally in the pathophysiology of lower urinary tract symptoms in PD.
OBJECTIVES: To investigate the role of beta oscillations in urinary voiding and their association with lower urinary tract symptoms in Parkinson disease (PD). METHODS: We used surgically implanted deep brain stimulation electrodes to record local field potential signals from the subthalamic nucleus (STN) and globus pallidus interna (GPi) of patients with PD during urinary voiding. Five patients with STN electrodes and 5 patients with GPi electrodes were tested. We also explored correlations between beta oscillatory power and urinary symptoms assessed by the International Consultation on Incontinence Lower Urinary Tract Symptoms questionnaire. RESULTS: Beta suppression occurred during urinary voiding in the GPi (p < 0.05) but not the STN. Furthermore, the beta signal in the GPi during voiding correlated significantly with severity of incontinence and urinary frequency (p < 0.05). CONCLUSIONS: In this study, we have demonstrated that local field potentials can provide information about the neural control of the bladder. Our findings suggest that the GPi is implicated in the process of urinary voiding and that its mechanism of action is linked to signals in the beta frequency band. Moreover, our correlational analyses show that beta oscillations may be implicated more generally in the pathophysiology of lower urinary tract symptoms in PD.
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