000145054 001__ 145054 000145054 005__ 20240722132054.0 000145054 0247_ $$2doi$$a10.1080/01616412.2019.1709141 000145054 0247_ $$2pmid$$apmid:31900094 000145054 0247_ $$2ISSN$$a0161-6412 000145054 0247_ $$2ISSN$$a1743-1328 000145054 0247_ $$2altmetric$$aaltmetric:73615996 000145054 037__ $$aDZNE-2020-00414 000145054 041__ $$aEnglish 000145054 082__ $$a610 000145054 1001_ $$0P:(DE-HGF)0$$aKaut, Oliver$$b0$$eCorresponding author 000145054 245__ $$aResting-state fMRI reveals increased functional connectivity in the cerebellum but decreased functional connectivity of the caudate nucleus in Parkinson's disease. 000145054 260__ $$aAbingdon, Oxon$$bTaylor & Francis$$c2020 000145054 264_1 $$2Crossref$$3online$$bInforma UK Limited$$c2020-01-03 000145054 264_1 $$2Crossref$$3print$$bInforma UK Limited$$c2020-01-02 000145054 3367_ $$2DRIVER$$aarticle 000145054 3367_ $$2DataCite$$aOutput Types/Journal article 000145054 3367_ $$0PUB:(DE-HGF)16$$2PUB:(DE-HGF)$$aJournal Article$$bjournal$$mjournal$$s1721647236_12030 000145054 3367_ $$2BibTeX$$aARTICLE 000145054 3367_ $$2ORCID$$aJOURNAL_ARTICLE 000145054 3367_ $$00$$2EndNote$$aJournal Article 000145054 520__ $$aObjective: Frequent falls are common in Parkinson's disease (PD). Resting-state fMRI (rs-fMRI) studies have found differences in functional connectivity between PD patients and healthy controls. However, whether functional connectivity in PD patients with frequent falls (PD-fallers) differs from those without falls (PD-non fallers) is unknown. Therefore, to elucidate the underlying mechanisms leading to postural instability in PD patients with frequent falls, we compared changes in functional connectivity between PD-fallers, PD-non fallers and healthy controls.Methods: Thirteen healthy controls (70.7 ± 7.2 years) were compared to thirteen PD-fallers (70.6 ± 5.9 years) and 19 PD-non fallers (71.61 ± 5.8 years) without cognitive impairment. We performed 1.5T rs-fMRI scans and evaluated gait and balance, motor symptoms and cognitive functions.Results: Cerebellar seed regions showed increased functional connectivity in PD-fallers compared to controls in two connections between the cerebellar cortex and vermis (p-value = 0.02). Conversely, in comparison to controls, functional connectivity between the precuneus and caudate nucleus was decreased in PD-non fallers (p-value = 0.015). A similar trend was also observed between controls and PD-fallers, although this difference did not reach statistical significance.Discussion: We found increased functional connectivity among cerebellar structures in PD, which may reflect an adaptive (compensatory) mechanism through activation of additional brain structures to restore gait function. In contrast, a relative disconnection between the precuneus and caudate nucleus in PD patients might indicate an impaired brain network unrelated to the risk of falls. Cerebellar areas might thus be considered as future therapeutic targets for neuromodulatory treatment of postural instability in PD.Abbreviations: DMN: default mode network; FC: functional connectivity; IPL: inferior parietal lobule; MMSE: Minimal Mental Status Examination; PD: Parkinson's disease; rs-fMRI: resting-state functional Magnetic Resonance Imaging; UPDRSIII: Unified Parkinson's disease ranking scale. 000145054 536__ $$0G:(DE-HGF)POF3-344$$a344 - Clinical and Health Care Research (POF3-344)$$cPOF3-344$$fPOF III$$x0 000145054 588__ $$aDataset connected to CrossRef, PubMed, 000145054 650_2 $$2MeSH$$aAged 000145054 650_2 $$2MeSH$$aCaudate Nucleus: diagnostic imaging 000145054 650_2 $$2MeSH$$aCaudate Nucleus: physiopathology 000145054 650_2 $$2MeSH$$aCerebellum: diagnostic imaging 000145054 650_2 $$2MeSH$$aCerebellum: physiopathology 000145054 650_2 $$2MeSH$$aCohort Studies 000145054 650_2 $$2MeSH$$aFemale 000145054 650_2 $$2MeSH$$aFollow-Up Studies 000145054 650_2 $$2MeSH$$aHumans 000145054 650_2 $$2MeSH$$aMagnetic Resonance Imaging: methods 000145054 650_2 $$2MeSH$$aMale 000145054 650_2 $$2MeSH$$aNerve Net: diagnostic imaging 000145054 650_2 $$2MeSH$$aNerve Net: physiopathology 000145054 650_2 $$2MeSH$$aParkinson Disease: diagnostic imaging 000145054 650_2 $$2MeSH$$aParkinson Disease: physiopathology 000145054 650_2 $$2MeSH$$aRest 000145054 7001_ $$0P:(DE-HGF)0$$aMielacher, Clemens$$b1 000145054 7001_ $$0P:(DE-HGF)0$$aHurlemann, René$$b2 000145054 7001_ $$0P:(DE-2719)2000056$$aWüllner, Ullrich$$b3$$eLast author$$udzne 000145054 77318 $$2Crossref$$3journal-article$$a10.1080/01616412.2019.1709141$$b : Informa UK Limited, 2020-01-02$$n1$$p62-67$$tNeurological Research$$v42$$x0161-6412$$y2020 000145054 773__ $$0PERI:(DE-600)2074874-7$$a10.1080/01616412.2019.1709141$$gVol. 42, no. 1, p. 62 - 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