Lack of Asymmetry of Nigrostriatal Dopaminergic Function in Healthy Subjects.

Movement Disorders : Official Journal of the Movement Disorder Society
Alicia GarridoSleep Innsbruck Barcelona (SINBAR) Group

Abstract

In right-handed patients with Parkinson's disease (PD) or isolated rapid eye movement sleep behavior disorder, dopamine transporter (DAT) [(123)I]β-carboxymethyoxy-3-β-(4-iodophenyl) tropane single photon emission computed tomography (SPECT) shows predominant nigrostriatal deficit in the left striatum. This suggests that in PD patients, the nigrostriatal system of the dominant hemisphere is more susceptible to disease-related dysfunction. To confirm this hypothesis, we investigated whether the nigrostriatal function is symmetric in healthy controls and in patients with PD. In 113 right-handed healthy controls and 279 right-handed early-PD patients, we examined the striatal dopaminergic terminals function in each hemisphere using DAT-SPECT. In the controls, DAT-SPECT showed symmetric specific binding ratios in the putamen and caudate nucleus of each hemisphere. In patients with PD, the specific binding ratio was lower in the left than in the right putamen. Right-handed healthy controls have symmetric nigrostriatal dopaminergic function. The left hemispheric predominance of nigrostriatal deficit seen in right-handed premotor and manifest PD represents an early pathological feature of the disease. © 2020 International Parkinson an...Continue Reading

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Citations

Aug 4, 2020·Journal of Parkinson's Disease·Esther CuboUNKNOWN Coppadis Study Group:
Dec 16, 2020·Annals of Clinical and Translational Neurology·Lana M ChahineAlex Iranzo
Dec 29, 2020·Journal of Parkinson's Disease·Tadashi UmeharaYasuyuki Iguchi
Jun 15, 2021·Movement Disorders : Official Journal of the Movement Disorder Society·Eleonora FiorenzatoRoberta Biundo
Aug 11, 2021·Brain Structure & Function·Lu-Yan GuJiali Pu

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