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Parkinson

Boala Parkinson și tulburări de mișcare.

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StudiuParkinsonÎncredere înaltă22.06.2026

Astrocyte Responses Mediate Regional Effects of Intermittent Theta-Burst Stimulation in Parkinsonian Rats

This preclinical study examined how intermittent theta-burst stimulation (iTBS), a noninvasive brain stimulation technique, modulates astrocyte function and glutamate homeostasis in a rat model of Parkinson's disease. Results showed iTBS improved striatal astrocyte responses, restored glutamate transporter function, and enhanced motor recovery, suggesting astrocyte modulation contributes to iTBS therapeutic effects.

StudiuParkinsonÎncredere înaltă22.06.2026

Fluid and Tissue Biomarkers in Parkinson's Disease: Immunodetection versus Seed Amplification Assays

This review examines advances in Parkinson's disease biomarkers, particularly α-synuclein detection using immunodetection and emerging seed amplification assays in cerebrospinal fluid and blood. Seed amplification assays show promise as more reliable diagnostic tools with improved accuracy, representing a significant advancement toward non-invasive biomarker testing for disease diagnosis and progression monitoring.

StudiuParkinsonÎncredere înaltă22.06.2026

Monoaminergic Degeneration and Ocular Motor Abnormalities in De Novo Parkinson's Disease

This study examined 124 drug-naive Parkinson's disease patients using PET imaging and eye-movement recordings to explore relationships between dopaminergic degeneration in specific brain regions and ocular motor dysfunction. Saccadic accuracy correlated with motor severity and cognitive impairment, suggesting eye movement analysis may reflect underlying neurochemical changes in early Parkinson's disease.

StudiuParkinsonÎncredere înaltă22.06.2026

Neuromelanin: Role in Parkinson's Disease Pathogenesis and Therapeutic Potential

This review examines neuromelanin's complex involvement in Parkinson's disease, highlighting its paradoxical neuroprotective properties as an antioxidant alongside its harmful effects through mitochondrial dysfunction and oxidative stress when accumulated. Emerging therapeutic strategies targeting neuromelanin accumulation include antioxidant therapy, proteostasis enhancement, ion chelation, and immunotherapy, though clinical trial results remain mixed.

StudiuParkinsonÎncredere înaltă22.06.2026

Blepharoclonus in Parkinsonism: Frequency and Diagnostic Utility

This prospective study assessed the prevalence of blepharoclonus (eyelid fluttering) in 75 Parkinson's disease patients and 10 with atypical parkinsonism, finding it present in 84% of PD cases and 60% of synucleinopathy cases but absent in non-synucleinopathy parkinsonian syndromes. The findings suggest blepharoclonus may have diagnostic utility in differentiating synucleinopathy-associated parkinsonism from other parkinsonian conditions.

StudiuParkinsonÎncredere înaltă21.06.2026

The RAB32 p.Ser71Arg Variant in Parkinsonisms: Insights from a Large Italian Cohort

A study of 4,600 Italian patients with Parkinson's disease or atypical parkinsonism identified 20 new carriers of the RAB32 p.Ser71Arg variant, which was associated with earlier disease onset (average 51 years) and good response to dopaminergic therapy. Carriers showed positive family history in 55.5% of cases, suggesting dominant inheritance patterns, with generally preserved cognitive function and mild psychiatric symptoms.

StudiuParkinsonÎncredere înaltă21.06.2026

Consensus practice recommendations for management of gastrointestinal dysfunction in Parkinson disease

This expert consensus document provides evidence-based clinical guidance on screening, diagnosis, and treatment of gastrointestinal dysfunction in Parkinson disease, a common non-motor symptom that can precede motor symptoms and significantly impact quality of life. Recommendations are organized by anatomical segments (oral cavity, esophagus, stomach, small intestine, colon) based on a modified Delphi panel approach involving movement disorder neurologists and gastroenterologists.

StudiuParkinsonÎncredere bună21.06.2026

Methamphetamine Use and Parkinson's Disease Risk: Clinical Recognition in Substance Users

Epidemiological and animal evidence indicates methamphetamine use significantly increases risk for Parkinson's disease and parkinsonism, potentially with earlier onset. Despite elevated prevalence in methamphetamine users, diagnosis is often missed due to under-detection, competing mortality risks, and confounding substance use patterns; clinicians should maintain vigilance for parkinsonian symptoms in this population.

StudiuParkinsonÎncredere înaltă21.06.2026

Advanced Parkinson's Disease: Clinical, Pathologic, and Imaging Markers—A Review

This review addresses the lack of consensus definition for advanced Parkinson's disease by synthesizing clinical features (motor fluctuations, falls, cognitive decline), pathological burden markers, and neuroimaging findings associated with disease progression. The authors propose a longitudinal assessment model incorporating clinical markers and quality-of-life metrics to better characterize and predict disease trajectory in PD patients.

StudiuParkinsonÎncredere bună21.06.2026

Cold exposure exacerbates tremor symptoms in Parkinson's disease

Cold temperatures are known to increase tremor severity in Parkinson's disease patients, likely due to temperature sensitivity affecting basal ganglia motor control. This seasonal effect is a recognized clinical observation that patients and caregivers should monitor and manage accordingly.

StudiuParkinsonÎncredere bună21.06.2026

The Role of Artificial Intelligence and Machine Learning in Parkinson's Disease Diagnosis and Atypical Parkinsonisms

This literature review examines how machine learning techniques, particularly support vector machines and neural networks, can improve early diagnosis and progression prediction in Parkinson's disease by analyzing diverse biomarker data. The analysis demonstrates that more sophisticated machine learning approaches and ensemble models achieve higher diagnostic accuracy than simpler methods, suggesting significant potential for enhancing diagnostic capacity in movement disorders.

StudiuParkinsonÎncredere înaltă21.06.2026

Chronic Musculoskeletal Pain and Risk of Incident Parkinson's Disease: A 13-Year Longitudinal Study

This large population-based cohort study of 355,890 participants followed for 13 years examined whether chronic musculoskeletal pain increases the risk of developing Parkinson's disease and related parkinsonism disorders. Results showed a dose-response relationship: participants with more widespread chronic pain sites had progressively higher risks of incident Parkinson's disease (11-49% increased risk depending on pain extent), though the mechanisms underlying this association remain unclear.

StudiuParkinsonÎncredere bună20.06.2026

B-type natriuretic peptide in Parkinson's disease: a novel biomarker of dysautonomia

This study examines NT-proBNP levels as a potential biomarker for identifying cardiovascular autonomic dysfunction in Parkinson's disease patients. Elevated NT-proBNP was significantly associated with orthostatic hypotension and abnormal autonomic function tests, suggesting it may serve as an early indicator of cardiac autonomic denervation in PD.

StudiuParkinsonÎncredere bună20.06.2026

Deep Learning Analysis of Optic Nerve Morphology Associated with Parkinson's Disease and Drug-Induced Parkinsonism in the LIFE Study

A large Japanese population-based study of 14,280 participants used deep learning to analyze cup-to-disc ratios from fundus photographs as a potential imaging biomarker for Parkinson's disease and drug-induced Parkinsonism. Participants with the highest cup-to-disc ratios showed significantly elevated odds of Parkinson's disease, suggesting optic nerve morphology may aid in identifying neurodegenerative pathology.

StudiuParkinsonÎncredere înaltă20.06.2026

Genetics of Parkinson's Disease: From Causes to Treatment

Parkinson's disease has a complex genetic architecture including five autosomal dominant forms, three recessive types, and multiple genetic risk factors such as SNCA and GBA1 variants, with approximately 15% of cases attributable to known genetic causes. Recent advances have enabled gene-targeted clinical trials and incorporation of genetic findings into a new biological classification system for Parkinson's disease.

StudiuParkinsonÎncredere înaltă20.06.2026

Validation of 2015 MDS Parkinson Disease Diagnostic Criteria in Autopsy-Confirmed Cases: A Scoping Review

This systematic literature review (1988–2024) evaluated the validity of the 2015 International Parkinson and Movement Disorder Society diagnostic criteria using pathologically-confirmed PD cases, identifying which supportive criteria and red flags best distinguish PD from atypical parkinsonian disorders. The study found that excellent levodopa response and rest tremor were most useful for PD diagnosis, though some red flags (supranuclear gaze palsy, rapid gait progression, bilateral symptoms) occurred in >5% of confirmed PD cases, suggesting potential criteria refinement.

StudiuParkinsonÎncredere înaltă20.06.2026

Pathogenic GRN Variants Found in 0.1% of Parkinson's Disease Patients: Implications for Differential Diagnosis

A study of over 18,500 PD patients identified pathogenic or likely pathogenic GRN variants in 24 patients (0.13%), suggesting that GRN-associated frontotemporal dementia can clinically mimic Parkinson's disease. The findings recommend comprehensive genetic testing including GRN analysis for patients with parkinsonism to improve diagnostic accuracy and inform treatment decisions.