Publications by authors named "Bloem B"

Objective and continuous monitoring of Parkinson's disease (PD) tremor in free-living conditions could benefit both individual patient care and clinical trials, by overcoming the snapshot nature of clinical assessments. To enable robust detection of tremor in the context of limited amounts of labeled training data, we propose to use prototypical networks, which can embed domain expertise about the heterogeneous tremor and non-tremor sub-classes. We evaluated our approach using data from the Parkinson@Home Validation study, including 8 PD patients with tremor, 16 PD patients without tremor, and 24 age-matched controls.

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Background: Conventional medical management, while essential, cannot address all multifaceted consequences of Parkinson's disease (PD). This pilot study explores the potential of a co-designed creative arts therapy on health-related quality of life, well-being, and pertinent non-motor symptoms.

Methods: We conducted an exploratory pilot study with a pre-post design using validated questionnaires.

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Background And Purpose: Physical activity has beneficial symptomatic effects for people with Parkinson's disease (PD), but increasing-and sustaining-a physically active lifestyle remains challenging. We investigated the feasibility (ability to increase step counts) and usability of a behavioral intervention using a motivational smartphone application to remotely increase physical activity in PD.

Methods: We performed a 4-week, double-blind pilot trial.

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Objective: Parkinson's disease (PD) resting tremor is thought to be initiated in the basal ganglia and amplified in the cerebello-thalamo-cortical circuit. Because stress worsens tremor, the noradrenergic system may play a role in amplifying tremor. We tested if and how propranolol, a non-selective beta-adrenergic receptor antagonist, reduces PD tremor and whether or not this effect is specific to stressful conditions.

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Article Synopsis
  • Parkinson's disease (PD) symptoms, particularly tremor, evolve differently over time, with bradykinesia and rigidity worsening while positive tremor symptoms may decrease.
  • The study used MRI and clinical assessments over two years to analyze changes in 520 PD patients, focusing on the relationship between tremor and brain structural changes.
  • Findings revealed that while bradykinesia and rigidity worsen with PD progression, action tremors tend to stabilize or diminish, indicating complex relationships between motor symptoms and brain atrophy.
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Parkinson's Disease is a progressive neurodegenerative disorder afflicting almost 12 million people. Increased understanding of its complex and heterogenous disease pathology, etiology and symptom manifestations has resulted in the need to design, capture and interrogate substantial clinical datasets. Herein we advocate how advances in the deployment of artificial intelligence models for Federated Data Analysis and Federated Learning can help spearhead coordinated and sustainable approaches to address this grand challenge.

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Background: Persons with Parkinson's disease (PD) experience progressive motor and non-motor symptoms which may influence their ability to drive a car. This is experienced as a massive challenge by many affected individuals, for whom being able to drive a car is vital to maintain functional independence.

Objectives: We assessed how the diagnosis of PD affected the possession of a driving license, how people with PD had adapted their driving style, and to what extent they had communicated about their driving ability with their healthcare professionals.

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Background: Alterations in gut microbiota are observed in Parkinson's disease (PD). Previous studies on microbiota-derived metabolites in PD were small-scale and post-diagnosis, raising concerns about reverse causality.

Objectives: Our goal was to prospectively investigate the association between plasma microbial metabolites and PD risk within a metabolomics framework.

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Background: Respiratory dysfunction is an important contributor to morbidity and mortality in advanced Parkinson's disease (PD), but it is unclear what parameters are sensitive to diagnose and monitor respiratory dysfunction across disease phases.

Objectives: We aimed to characterize respiratory dysfunction in mild to moderate PD.

Methods: In 20 individuals without cardiopulmonary comorbidity, pulmonary and inspiratory muscle function testing were performed ON-medication.

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Background: Current diagnosis and monitoring of Parkinson's disease (PD) is based on subjective clinical assessments. Objective measures of motor functioning could support clinical acumen. Computer vision (CV) technology is a promising contactless technique but requires further validation.

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Introduction: Orthostatic hypotension is common in people with Parkinson's disease (PD) due to autonomic dysfunction and medication use and can have a significant negative impact on quality of life. Pharmacological treatment is often complicated due to complex blood pressure regulation problems. This case report presents a patient whose symptoms of orthostatic intolerance were successfully treated with the non-pharmacological method of head-up tilt sleeping (HUTS).

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Anti-IgLON5 disease is a unique condition that bridges autoimmunity and neurodegeneration. Since its initial description 10 years ago, an increasing number of autopsies has led to the observation of a broader spectrum of neuropathologies underlying a particular constellation of clinical symptoms. In this study, we describe the neuropathological findings in 22 patients with anti-IgLON5 disease from 9 different European centers.

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Article Synopsis
  • There is growing support for remote speech therapy as a beneficial treatment for improving speech quality and quality of life in patients with Parkinson's disease.
  • The PERSPECTIVE study found that after 8 weeks, patients receiving remote therapy reported better communication and a more significant reduction in disease-related quality of life issues compared to those on a waiting list.
  • The results suggest that personalized remote speech therapy can have a positive impact, warranting further exploration and potential integration into standard care for Parkinson’s disease.
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Our language affects patients' perceptions of therapies. In Parkinson's disease, emergent response fluctuations and dyskinesias typically trigger conversations around commencing an "Advanced Therapy" which carries notions of Advanced Disease. The patient, resolute in their commitment to fighting the disease, is misled.

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Levodopa is the most widely used medication for the symptomatic treatment of Parkinson's disease and, despite being an "old" drug, is still considered the gold standard for offering symptomatic relief. The pharmacokinetic and pharmacodynamics of levodopa have been studied extensively. Our review explores the molecular mechanisms that affect the absorption of this drug, focusing on the large intra- and interindividual variability of absorption that is commonly encountered in daily clinical practice, and on the interaction with other medications.

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Freezing of gait, characterized by involuntary interruptions of walking, is a debilitating motor symptom of Parkinson's disease that restricts people's autonomy. Previous brain imaging studies investigating the mechanisms underlying freezing were restricted to scan people in supine positions and yielded conflicting theories regarding the role of the supplementary motor area and other cortical regions. We used functional near-infrared spectroscopy to investigate cortical haemodynamics related to freezing in freely moving people.

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Article Synopsis
  • The study explores how copy number variations (CNVs) affect the development of Parkinson's disease (PD), aiming to identify new genetic mechanisms linked to sporadic cases of the disease.
  • Utilizing data from over 11,000 PD patients and nearly 9,000 controls, the researchers discovered 14 significant CNV loci associated with PD, including various gene duplications and deletions.
  • The research highlights a higher prevalence of CNVs in specific PD-related genes among patients and suggests that certain CNVs, especially those involving the gene, may lead to earlier onset of the disease in early-onset PD cases.
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Background: Digital health technologies (DHT) enable self-tracking of bio-behavioral states and pharmacotherapy outcomes in various diseases. However, the role of gender, encompassing social roles, expectations, and relations, is often overlooked in their adoption and use. This study addresses this issue for persons with Parkinson's disease (PD), where DHT hold promise for remote evaluations.

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BACKGROUND: For people with a moderate stage of Parkinson disease (PD), dedicated care coordination combined with advance care planning (ACP) is highly needed. However, evidence is lacking. The objective of this study was to assess the feasibility and acceptability of the study processes to inform a larger randomized controlled trial, aiming the effectiveness of a combined intervention on ACP and care coordination for people with PD.

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