Objective: Prelemniscal radiation (Raprl) lesions and deep brain stimulation effectively control motor symptoms of Parkinson disease, but individual variations in the stereotactic location of its fiber components constitute a significant concern. The objective of this study was to determine individual variations in the stereotactic location of fiber tracts composing Raprl.
Methods: Raprl fiber composition was determined in a group of 10 Parkinson patients and 10 matched controls using 3T magnetic resonance imaging, brain imaging processed for diffusion-weighted images, tract density imaging, and constrained spherical deconvolution. The stereotactic position of the point of maximal proximity (PMP), which is the point where the most significant number of fibers is concentrated in the smallest volume in the tractography, was evaluated in the right and left hemispheres of the same person, between individuals and between patients and controls for each tract in coordinates "x," "y," and "z." The stereotactic coordinates at which PMP of all tracts meet were statistically determined, representing the recommended aim for this target.
Results: Stereotactic coordinates of the 3 fiber tracts composing Raprl, cerebellar-thalamic-cortical, globus pallidus-peduncle-pontine nucleus, and mesencephalic-orbital frontal cortex, did not vary between right and left hemispheres in the same person and between patients and controls. In contrast, PMP variability between individuals was significant, mainly for the mesencephalic-orbitofrontal tract. Therefore, probabilistic tractography can better determine individual variations to plan electrode trajectories.
Conclusions: Individual PMP variations for fiber tracts in Raprl, identified by probabilistic tractography, provide a platform for planning the stereotactic approach to conform volumes for deep brain stimulation and lesions.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1016/j.wneu.2022.07.008 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Care delivery in the context of district mental healthcare plans in Ghana: a qualitative study exploring experiences of primary healthcare workers and service users.
BMJ Open
December 2024
Centre for Global Mental Health, Health Service and Population Research Department, Institute of Psychiatry, Psychology & Neuroscience, King's College London, London, London, UK.
Objective: To explore the perceptions and experiences of mental health service users and healthcare workers regarding the implementation of district mental healthcare plans (DMHPs) in three district demonstration sites in Ghana.
Design: The study employed a qualitative design using reflexive thematic analysis. Interview data were analysed by combining inductive and deductive approaches.
Impact of COVID-19 and recovery of routine diabetic retinopathy digital screening across different regions in England: an analysis of publicly available data.
BMJ Open
December 2024
Vision and Eye Research Institute, School of Medicine, Anglia Ruskin University, Cambridge, UK.
Objective: This study aims to examine the reduction and subsequent recovery of routine digital screening (RDS) uptake in England from 2018 to 2022, exploring national, regional and individual Diabetic Eye Screening Programme (DESP) levels. The COVID-19 lockdown in most areas of England was from 26 March 2020 to 23 June 2020 (first national lockdown), 5 November 2020 to 2 December 2020 (second national lockdown) and 6 January 2021 to 8 March 2021 (third national lockdown).
Design: Retrospective data analysis.
How does organisational culture facilitate uptake of home dialysis? An ethnographic study of kidney centres in England.
BMJ Open
December 2024
School of Medicine, Keele University, Keele, UK.
Objective: The proportion of people having home dialysis for kidney disease varies considerably by treating centre, socioeconomic deprivation levels in the area and to some extent ethnicity. This study aimed to gain in-depth insights into cultural and organisational factors contributing to this variation in uptake.
Design: This is the first ethnographic study of kidney centre culture to focus on home dialysis uptake.
Molecular biomarkers associated with TBI outcome in individuals of Black racial identity or African ancestry: a narrative review.
World Neurosurg
December 2024
College of Medicine, SUNY Downstate Health Sciences University, Brooklyn, New York, USA; Global Neurosurgery Laboratory, SUNY Downstate Health Sciences University, Brooklyn, New York, USA; Department of Neurology, One Brooklyn Health/Brookdale University Hospital and Medical Center, Brooklyn, New York, USA; Department of Neurology; SUNY Downstate Health Sciences University, Brooklyn, New York, USA; Institute for Genomics in Health, SUNY Downstate Health Sciences University, Brooklyn, New York, USA; Division of Neurosurgery, Department of Surgery, SUNY Downstate Health Sciences University, Brooklyn, New York, USA; Department of Community Health Sciences, School of Public Health, SUNY Downstate Health Sciences University; Department of Surgery, One Brooklyn Health/Brookdale University Hospital and Medical Center, Brooklyn, New York, USA. Electronic address:
Traumatic brain injury (TBI) is a leading cause of death and disability worldwide and a major global health concern. In the United States (US), individuals of Black or African American racial identity experience disproportionately higher rates of TBI and suffer from worse post-injury outcomes. Contemporary research agendas have largely overlooked or excluded Black populations, resulting in the continued marginalization of Black patient populations in TBI studies, thereby limiting the generalizability of ongoing research to patients in the US and around the world.
View Article and Find Full Text PDFEffect of Medium Chain Triglycerides and Whey Protein Isolate Preloads on Glycaemia in Type 2 Diabetes: A randomised crossover study.
Am J Clin Nutr
December 2024
MRC Versus Arthritis Centre for Musculoskeletal Ageing Research, School of Life Sciences, University of Nottingham, Queen's Medical Centre, Nottingham, United Kingdom. Electronic address:
Background: Small nutritional preloads can reduce postprandial glucose excursions in individuals with and without metabolic syndrome or T2D. However, most studies have focused on preloads administered before single meals and have predominantly used protein-based preloads.
Objective: To investigate the effects of sequential consumption of medium chain triglycerides (MCT) and whey protein isolate (WPI) preloads before breakfast lunch and dinner on postprandial, diurnal and 24h glycaemia in individuals with T2D.
Want AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!