Carsten Eggers

Carsten Eggers
Philipps University of Marburg | PUM · Klinik für Neurologie (Marburg)

Univ.-Prof. Dr. med.

About

146
Publications
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Publications

Publications (146)
Article
Full-text available
Background: Working memory (WM) training (WMT) is a popular intervention approach against cognitive decline in patients with Parkinson's disease (PD). However, heterogeneity in WM responsiveness suggests that WMT may not be equally efficient for all patients. Objective: The present study aims to evaluate a multivariate model to predict post-inte...
Article
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COVER ILLUSTRATION Larger cohorts of multi‐site MRI data are crucial for neuroimaging research. Harmonization strategies become necessary. The WHARMPA method is user‐friendly and provides a powerful solution to clean the analyses by removing variability associated with the differences between sites. These Weighted HARMonization PArameters encode gl...
Article
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The prevailing network perspective of Parkinson's disease (PD) emerges not least from the ascending neuropathology traceable in histological studies. However, whether longitudinal in vivo correlates of network degeneration in PD can be observed remains unresolved. Here, we applied a trimodal imaging protocol combining 18F-fluorodeoxyglucose (FDG)-a...
Article
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Most classification approaches for idiopathic Parkinson’s disease subtypes primarily focus on motor and non-motor symptoms. Besides these characteristics, other features, including gender or genetic polymorphism of dopamine receptors are potential factors influencing the disease’s phenotype. By utilizing a kmeans-clustering algorithm we were able t...
Article
Background Deep Brain Stimulation (DBS) has been proven to alleviate motor symptoms in Parkinson's Disease (PD). Regarding non-motor symptoms, however, inconsistencies have been reported, on whether DBS causes reductions in well-being and functioning. To assess motor and non-motor impairment in DBS-patients, the Deep Brain Stimulation Impairment Sc...
Article
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Research on support for relatives of patients with Parkinsonism has mainly focused on caregivers, while preventive offers for non-caregiving relatives are lacking. Thus, the aim of this multicenter pilot study is to develop and assess the feasibility of a preventive psychosocial support program for relatives of patients with Parkinsonism. It specif...
Article
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Multi-site MRI datasets are crucial for big data research. However, neuroimaging studies must face the batch effect. Here, we propose an approach that uses the predictive probabilities provided by Gaussian processes (GPs) to harmonize clinical-based studies. A multi-site dataset of 216 Parkinson's disease (PD) patients and 87 healthy subjects (HS)...
Article
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Background: Meta-analyses indicate positive effects of cognitive training (CT) in patients with Parkinson's disease (PD), however, most previous studies had small sample sizes and did not evaluate long-term follow-up. Therefore, a multicenter randomized controlled, single-blinded trial (Train-ParC study) was conducted to examine CT effects in PD pa...
Article
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Background Subjective cognitive decline (SCD) may occur very early in the course of Parkinson’s disease (PD) before the onset of objective cognitive decline. Data on neural correlates and determinants of SCD in PD are rare. Objective The aim of the present study was to identify neural correlates as well as sociodemographic, clinical, and neu- ropsy...
Article
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Freezing of gait is a common phenomenon of advanced Parkinson’s disease. Besides locomotor function per se, a role of cognitive deficits has been suggested. Limited evidence of associated dopaminergic deficits points to caudatal denervation. Further, altered functional connectivity within resting-state networks with importance for cognitive functio...
Article
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Objective: This study aims to evaluate feasibility and effects of a newly developed mindfulness intervention tailored to specific needs of patients with Parkinson’s disease (PD). Background: The phenomenon of impaired self-awareness of motor symptoms (ISAm) in PD might be reduced by increasing patients’ mindfulness. A PD-specific mindfulness interv...
Article
Background: Parkinsonian syndromes are heterogeneous chronic neurodegenerative disorders associated with both motor and non-motor symptoms. The symptoms have major psychosocial effects on the quality of life of patients and can be a burden for caregivers. So far, several questionnaires have been developed to assess quality of life in Parkinsonism,...
Presentation
Parkinson's disease (PD) is an incurable neurodegenerative disease, strongly affecting the patient’s quality of life. Persons with PD (PwPD) have complex care requirements in terms of motor and non-motor aspects. However, many healthcare systems, including Germany, lack integrated care delivery pathways to address these complex care needs. One pos...
Presentation
In Deutschland ist die Parkinson-Krankheit (PD) die zweithäufigste neurodegenerative Erkrankung, wobei eine zunehmende Prävalenz zu beobachten ist. PD erfordert eine langfristig zugängliche, multidisziplinäre, patientenzentrierte Behandlung. Vernetzte Versorgungsansätze haben sich als wirksames Instrument zur Erfüllung dieser Anforderungen erwiesen...
Article
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Background Impaired self-awareness of cognitive deficits (ISAcog) has rarely been investigated in Parkinson's disease (PD). ISAcog is associated with poorer long-term outcome in other diseases. This study examines ISAcog in PD with and without mild cognitive impairment (PD-MCI), compared to healthy controls, and its clinical-behavioral and neuroima...
Preprint
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Next to motor and non-motor symptoms some more basic features are relevant in idiopathic Parkinson’s disease subtype classification influencing basal ganglia circuitry via dopamine receptor polymorphism and gender dimorphism. By kmeans -clustering algorithm we found an influence of D2 receptor polymorphism and gender on treatment response to dopami...
Article
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Background: Parkinson's disease (PD) is a progressive neurodegenerative disease with motor- and non-motor symptoms. When the disease progresses, symptom burden increases. Consequently, additional care demands develop, the complexity of treatment increases, and the patient's quality of life is progressively threatened. To address these challenges, t...
Article
Spatial covariance mapping of brain activity has been used increasingly with metabolic imaging to detect and quantify abnormal disease patterns in patient populations. Metabolic topographies such as the Parkinson's disease-related pattern (PDRP), while extensively validated, require access to positron emission tomography (PET) and radiation exposur...
Article
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Involvement of the default mode network (DMN) in cognitive symptoms of Parkinson's disease (PD) has been reported by resting-state functional MRI (rsfMRI) studies. However, the relation to metabolic measures obtained by [18F]-fluorodeoxyglucose positron emission tomography (FDG-PET) is largely unknown. We applied multimodal resting-state network an...
Article
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Background Parkinson’s disease (PD) patients experience disabling motor dysfunctions as well as non-motor symptoms (NMSs) that can highly impact their perceived quality of life. Besides pharmacological treatment options, active intervention programs have set some attention in managing these symptoms. However, previous studies mainly assessed the ef...
Article
Objectives: This is a protocol for a Cochrane Review (intervention). The objectives are as follows:. To compare effects of different physical interventions in adult participants with Parkinson's disease on the improvement of motor functions and QoL and the reduction of adverse events. To generate a clinically meaningful treatment ranking of physica...
Article
Background: Patients with Parkinson’s disease (PD) are highly vulnerable to develop cognitive dysfunctions, and the mitigating potential of early cognitive training (CT) is increasingly recognized. Predictors of CT responsiveness, which could help to tailor interventions individually, have rarely been studied in PD. This study aimed to examine indi...
Article
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In order to understand the influence of two dopaminergic signalling pathways, TaqIA rs1800497 (influencing striatal D2 receptor density) and Ser9Gly rs6280 (influencing the striatal D3 dopamine-binding affinity), on saccade generation and psychiatric comorbidities in Parkinson’s disease, this study aimed to investigate the association of saccadic p...
Article
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Background: Meta-analyses have demonstrated cognitive training (CT) benefits in Parkinson's disease (PD) patients. However, the patients' cognitive status has only rarely been based on established criteria. Also, prediction analyses of CT success have only sparsely been conducted. Objective: To determine CT effects in PD patients with mild cogni...
Article
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Zusammenfassung Die Parkinson-Krankheit als chronische neurodegenerative Erkrankung bedarf eines engen Zusammenspiels verschiedener Fachdisziplinen, um eine bestmögliche Lebensqualität der Patienten zu gewährleisten. Ein immer wieder identifiziertes Problem ist die insuffiziente Kommunikation zwischen den Protagonisten (z. B. „caregiver“, Ärzte und...
Article
Background: Parkinson's disease (PD) is characterized by brain metabolic networks, specifically associated with motor and cognitive manifestations. Few studies have investigated network changes in cerebral hemispheres ipsilateral and contralateral to the clinically more affected body side. Objective: We examined hemispheric network abnormalities...
Article
Zusammenfassung Die vorliegende Arbeit gibt einen Überblick über die verschiedenen nuklearmedizinischen Verfahren in der Diagnostik bei neurodegenerativen Parkinson-Syndromen sowie ihre Evidenzlage und soll praxistaugliche Entscheidungshilfen in der Anwendung und Interpretation der Methoden und Befunde ermöglichen. Die Wertigkeit der Verfahren unte...
Article
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Integrated care is regarded as a key for care delivery to persons with chronic long-term conditions such as Parkinson’s disease. For persons with Parkinson’s disease, obtaining self-management support is a top priority in the context of integrated care. Self-management is regarded as a crucial competence in chronic diseases since the affected perso...
Article
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Background Alterations in the GBA gene (NM_000157.3) are the most important genetic risk factor for Parkinson's disease (PD). Biallelic GBA mutations cause the lysosomal storage disorder Gaucher's disease. The GBA variants p.E365K and p.T408M are associated with PD but not with Gaucher's disease. The pathophysiological role of these variants needs...
Article
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Parkinson’s disease is a complex neurodegenerative disease that can be best treated with a multi-disciplinary care approach. Building care networks has been shown as a useful tool to facilitate the integration of care services and improve outcomes for patients and care providers. However, experiences and practices relating to building a network are...
Article
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Access to specialized care is essential for people with Parkinson´s disease (PD). Given the growing number of people with PD and the lack of general practitioners and neurologists, particularly in rural areas in Germany, specialized PD staff (PDS), such as PD nurse specialists and Parkinson Assistants (PASS), will play an increasingly important rol...
Article
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Impairment of working memory and executive functions are already frequently observed in early stages of Parkinson’s disease. Improvements in working memory performance in this cohort could potentially be achieved via working memory training. However, the specific neural mechanisms underlying different working memory processes such as maintenance as...
Article
People living with Parkinson's disease (PwP) experience a wide range of motor and non-motor symptoms associated with increasing complexity of care delivery. A multispecialty approach has been presented as an intuitive solution for tailored and comprehensive care delivery. Nevertheless, past trials of both multidisciplinary or interdisciplinary care...
Article
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Background Quality of life in Parkinson's disease (PD) is affected by motor and nonmotor symptoms, necessitating an integrated care approach. Existing care models vary considerably in numerous domains. The objectives of this study were to perform a systematic review and meta‐analysis of PD integrated care models and develop recommendations for a re...
Article
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Background: Optimal management in expert centers for Parkinson's disease (PD) usually involves pharmacological and non-pharmacological interventions, delivered by a multidisciplinary approach. However, there is no guideline specifying how this model should be organized. Consequently, the nature of multidisciplinary care varies widely. Objective:...
Article
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Although our understanding of Parkinson´s disease (PD) has improved and effective treatments are available, caring for people with PD remains a challenge. The large heterogeneity in terms of motor symptoms, nonmotor symptoms, and disease progression makes tailored individual therapy and individual timing of treatment necessary. On the other hand, o...
Article
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Objective: This study aims to increase self-awareness in patients with Parkinson's disease (PD) using a newly developed mindfulness-based intervention, tailored for the specific needs of PD patients. Its impact on self-awareness and patients' daily lives is currently being evaluated. Background: Recently, the phenomenon of impaired self-awarenes...
Article
The spreading hypothesis of neurodegeneration assumes an expansion of neural pathologies along existing neural pathways. Multimodal neuroimaging studies have demonstrated distinct topographic patterns of cerebral pathologies in neurodegeneration. For Parkinson's disease the hypothesis so far rests largely on histopathological evidence of α-synuclei...
Article
Objective: To determine the feasibility and evaluate effects of a computerized working memory (WM) training (WMT) in patients with Parkinson’s Disease (PD) on cognitive and clinical outcomes. Methods: 76 patients with PD without cognitive impairment were randomized to either the WMT group (n=37), who participated in a 5-week adaptive WMT, or a pass...
Article
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Background Cognitive impairment is a very frequent and severe nonmotor symptom of Parkinson’s disease (PD). Early intervention in this at-risk group for cognitive decline may be crucial for long-term preservation of cognitive functions. Computerized working memory training (WMT) has been proven beneficial in non-PD patient populations, but such evi...
Article
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Background: Although deep brain stimulation of the globus pallidus internus (GPi-DBS) is an established treatment for many forms of dystonia, including generalized as well as focal forms, its effects on brain (dys-)function remain to be elucidated, particularly for focal and segmental dystonia. Clinical response to GPi-DBS typically comes with som...
Article
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Basal ganglia (BG) circuitry plays a crucial role in the control of movement. Degeneration of its pathways and imbalance of dopaminergic signalling goes along with movement disorders such as Parkinson's disease. In this study, we explore the interaction of degeneration in two BG pathways (the nigro-striatal and dentato-pallidal pathway) with D2 rec...
Article
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Background: The diagnosis of Parkinson's disease (PD) often remains a clinical challenge. Molecular neuroimaging can facilitate the diagnostic process. The diagnostic potential of metabolomic signatures has recently been recognized. Methods: We investigated whether the joint data analysis of blood metabolomics and PET imaging by machine learning...
Article
These authors contributed equally to this work. Impulsive-compulsive behaviours like pathological gambling or hypersexuality are a frequent side effect of dopamine replacement therapy in patients with Parkinson's disease. Multiple imaging studies suggest a significant reduction of presynaptic dopamine transporters in the nucleus accumbens to be a p...
Article
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Impulsivity and hypomania are common non-motor features in Parkinson’s disease (PD). The aim of this study was to find the overlapping and distinct neural correlates of these symptoms in PD. Symptoms of impulsivity and hypomania were assessed in 24 PD patients using the Barratt Impulsiveness Scale (BIS-11) and Self-Report Manic Inventory (SRMI), re...
Article
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The most frequently used instrument to assess health-related quality of life (HrQoL) in Parkinson’s disease (PD) is the Parkinson’s Disease Questionnaire 39 (PDQ-39). However, both the dimensionality of the eight PDQ-39 subscales and their summary score recently faced criticism. Furthermore, data on disease-related and neuropsychological determinan...
Data
Figure S1 displays q-q plots for all variables used in this study. Tables S2 and S3 extend the reported data of the PCA on the eight original subscales of the PDQ-39 and display the factor loadings of the pattern and structure matrix after oblique promax rotation.
Article
A pathological communication between the basal ganglia (BG) and the cerebellum (Cb) at the level of the thalamus has been proposed to be causative for the generation of parkinsonian tremor. Recent studies, however, indicated, that altered Cb-thalamic circuitry is not only underlying the genesis of tremor, but is involved in the generation of other...
Article
Zusammenfassung Hintergrund Wenig ist über die patientenseitig wahrgenommene Versorgungssituation des Morbus Parkinson in Deutschland bekannt. Im Einzelnen besteht ein gesteigertes Interesse der Versorgungsforschung, besser zu verstehen, welche Rolle verschiedene Akteure im Versorgungsprozess über den Krankheitsverlauf hinweg einnehmen, welche mögl...
Article
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Background: Palliative care in Parkinson's Disease (PD) patients considerably differs from palliative care in oncology patients. Integrated care models are a concept to support patients and improve management of PD symptoms. However, it is not known if the access to PD patients at the end of life can be achieved through integrated care models. Aim:...
Article
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Introduction: Improving quality of life (QoL) is a key issue when dealing with Parkinson's disease (PD). Integrative care shows potential to achieve improvements in QoL. Here, we analyzed whether a community-based, open-label, integrated approach improves QoL in PD patients. Methods: PD patients were screened for eligibility and evaluated by a u...
Article
Zusammenfassung Obwohl Patienten mit unheilbar neurologischen Erkrankungen oftmals unter belastenden Symptomen leiden und an ihren Erkrankungen und damit einhergehenden Komplikationen versterben können, werden diese bislang noch zu selten unter palliativmedizinischen/hospizlichen Gesichtspunkten behandelt. Erste Schätzungen sehen bei durchschnittli...
Article
Although patients with incurable neurological diseases suffer from a variety of distressing symptoms and may die from their neurological condition and associated complications, palliative and hospice care for these patients to date remains rare. Initial estimates indicate that on average 10% of all patients suffering from a neurological disease nee...
Article
Objective: The aim of this study is to investigate the influence of the intensity of dopaminergic projections to the ventral striatum (VS) measured with F-18-DOPA-PET in the development of impulse control disorders (ICDs) in patients with Parkinson’s disease (PD). Background: ICDs including gambling, hypersexuality etc. are a frequent side effect...
Article
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Objective We wanted to identify differences in grey and white matter in essential tremor patients compared to controls in the non‐motor domain, using the example of impaired verbal fluency. Background A disturbance of verbal fluency in essential tremor patients compared to healthy controls is behaviorally well described. Methods Voxel‐based morph...
Article
Parkinson’s disease (PD) is a common progressive neurodegenerative disorder. Studies using resting-state functional MRI to investigate underlying pathophysiology of motor and non-motor symptoms in PD yielded largely inconsistent results. This quantitative neuroimaging meta-analysis aims to identify consistent abnormal intrinsic functional patterns...
Article
Background: Bilateral deep brain stimulation of the subthalamic nucleus (STN-DBS) has considerable influence on motor and non-motor symptoms in Parkinson's disease (PD). While improvements in motor functioning can be easily assessed with general quality of life questionnaires, the measurement of specific STN-DBS-associated impairments often remain...