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Susceptibility map-weighted MRI can distinguish tremor-dominant Parkinson's disease from essential tremor.
Sci Rep
January 2025
Department of Neurology, Asan Medical Center, University of Ulsan College of Medicine, 88 Olympic-ro 43-gil, Songpa-gu, Seoul, 05505, Republic of Korea.
Distinguishing between Parkinson's disease (PD) and essential tremor (ET) can be challenging sometimes. Although positron emission tomography can confirm PD diagnosis, its application is limited by high cost and exposure to radioactive isotopes. Patients with PD exhibit loss of the dorsal nigral hyperintensity on brain magnetic resonance imaging (MRI).
View Article and Find Full Text PDFThe effect of L-dopa and DBS on cortical oscillations in Parkinson's disease analyzed by Hidden Markov Model algorithm.
Neuroimage
December 2024
Department of Neurosurgery, Affiliated Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China. Electronic address:
Article Synopsis
- Parkinson's disease (PD) is a movement disorder linked to the degeneration of dopamine-producing neurons, and treatments like Levodopa (L-dopa) and Subthalamic Deep Brain Stimulation (STN-DBS) have distinct effects on brain activity that need further study.
- In a study involving 21 PD patients on L-dopa and 11 patients with STN-DBS, researchers used Magnetoencephalogram (MEG) data to analyze how these treatments impacted brain state dynamics through a statistical method called the Time-delay embedded Hidden Markov Model (TDE-HMM).
- Results showed that L-dopa enhanced motor state and beta wave activity in the brain, correlating
Predicting Post-Operative Side Effects in VIM MRgFUS Based on THalamus Optimized Multi Atlas Segmentation (THOMAS) on White-Matter-Nulled MRI: A Retrospective Study.
AJNR Am J Neuroradiol
December 2024
From the UCLA Brain Tumor Imaging Laboratory (BTIL), Center for Computer Vision and Imaging Biomarkers (S.O., A.K., B.M.E., J.Y.), University of California, Los Angeles, Los Angeles, California
Background And Purpose: Precise and individualized targeting of the ventral intermediate thalamic nucleus for the MR-guided focused ultrasound is crucial for enhancing treatment efficacy and avoiding undesirable side effects. In this study, we tested the hypothesis that the spatial relationships between Thalamus Optimized Multi Atlas Segmentation derived segmentations and the post-focused ultrasound lesion can predict post-operative side effects in patients treated with MR-guided focused ultrasound.
Materials And Methods: We retrospectively analyzed 30 patients (essential tremor, n = 26; tremor-dominant Parkinson's disease, n = 4) who underwent unilateral ventral intermediate thalamic nucleus focused ultrasound treatment.
Correlation of the clinical rating scale for tremor with a global assessment.
Clin Neurol Neurosurg
December 2024
Department of Biostatistics, Epidemiology, and Informatics, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, USA.
Objective: The Fahn-Tolosa-Marín Clinical Rating Scale for Tremor (CRST) includes three parts (tremor severity, motor task performance, functional disability) and a separate global assessment of impairment completed by both the patient and examiner. Although the CRST is used to determine tremor severity and the efficacy of treatments for tremor, the instrument may not sufficiently capture the patient's perspective. The objective of this study was to determine the association of the CRST subpart and total scores with the global assessment.
View Article and Find Full Text PDFCognitive impacts of unilateral MR-guided focused ultrasound thalamotomy: a meta-analysis and a call for systematic neuropsychological assessment.
J Neurosurg
December 2024
Departments of1Neurology.
Objective: Pharmacoresistant tremors, often seen in Parkinson disease and essential tremor, significantly impair patient quality of life. Although deep brain stimulation has been effective, its invasive nature limits its applicability. MR-guided focused ultrasound (MRgFUS) thalamotomy offers a noninvasive alternative, but its cognitive impacts are not fully understood.
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