Involvement of limbic structures in patients with isolated rapid eye movement sleep behavior disorder

Lee, D. A.; Lee, H. J.; Park, Kang Min

doi:10.1007/s41105-022-00440-2

Cited by 1 publication

(1 citation statement)

References 33 publications

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“…However, the neural network that underlies REM sleep without atonia and RBD is known to involve several cortical regions, the brainstem, and the basal ganglia [4–7]. In a previous study by our group, we demonstrated that the decreased volumes in limbic structures (amygdala and hypothalamus) were related to preclinical involvement of cognitive function in patients with iRBD; the results imply the possibility that structural alterations may precede the onset of clinical symptoms [8]. Recent studies have shown that there are significant alterations in the network beyond the known brain structures controlling REM sleep [7], with particular attention being drawn to the cerebellum as a newly identified component of this network [9].…”

Section: Introductionmentioning

confidence: 95%

Cerebellar Volume Reduction in Patients with Isolated REM Sleep Behavior Disorder: Evidence of a Potential Role of the Cerebellum

Lee,

Park

2023

Eur Neurol

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Objectives: In this study, we aimed to investigate changes in the total cerebellar volume, subdivisions of the cerebellar volume, and intrinsic cerebellar network in patients with isolated Rapid eye movement (REM) sleep behavior disorder (iRBD) compared to health controls. Methods: We enrolled patients with newly diagnosed iRBD and healthy controls who had no structural lesions according to their brain MRI. All participants underwent three-dimensional T1-weighted imaging. We obtained the total cerebellar volume and subdivisions of the cerebellar volume using the ACAPULCO program and calculated the intrinsic cerebellar network using a BRAPH program based on the subdivisions of the cerebellar volume by applying a graph theory. We compared the cerebellar volumes and intrinsic cerebellar network between the patients with iRBD and healthy controls. Results: In total, we enrolled 43 patients with iRBD and 47 healthy controls. Total cerebellar volume in patients with iRBD was lower than that in the healthy controls (8.4637 vs. 9.0863%, p=0.0001). There were significant differences in the subdivisions of cerebellar volume between the groups. The volumes of the right and left lobule VIIB in the patients with iRBD were lower than those in the healthy controls (right, 0.3495 vs. 0.4025%, p=0.0009; left, 0.3561 vs. 0.4293%, p<0.0001). However, the other cerebellar volumes, such as the corpus meullare and vermis, were not different between the groups. The intrinsic cerebellar network was not different between the patients with iRBD and healthy controls. Conclusion: We found decreased total cerebellar volumes and subdivisions of the cerebellar volume, particularly in the right and left lobule VIIB, in patients with iRBD compared to healthy controls. The present results suggest that the cerebellum may play a potential role in the pathogenesis of iRBD.

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