Rachel Guimarães

ORCID: 0000-0001-9382-9309
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About
Contact & Profiles
Research Areas
  • Parkinson's Disease Mechanisms and Treatments
  • Neurological disorders and treatments
  • Genetic Neurodegenerative Diseases
  • Advanced Neuroimaging Techniques and Applications
  • Mitochondrial Function and Pathology
  • Botulinum Toxin and Related Neurological Disorders
  • Neurological and metabolic disorders
  • Olfactory and Sensory Function Studies
  • Cerebral Palsy and Movement Disorders
  • Functional Brain Connectivity Studies
  • Occupational Health and Burnout
  • Academic Research in Diverse Fields
  • Cerebrovascular and Carotid Artery Diseases
  • Cardiovascular Health and Disease Prevention
  • Physical Education and Gymnastics
  • Transcranial Magnetic Stimulation Studies
  • HIV/AIDS oral health manifestations
  • Leprosy Research and Treatment
  • Linguistics and Language Studies
  • Cerebrovascular and genetic disorders
  • Alzheimer's disease research and treatments
  • Stroke Rehabilitation and Recovery
  • Voice and Speech Disorders
  • Balance, Gait, and Falls Prevention
  • RNA regulation and disease

Universidade Estadual de Campinas (UNICAMP)
2015-2024

Brazilian Institute of Neuroscience and Neurotechnology
2024

Universitario Francisco de Asís
2024

Cognitive Neuroimaging Lab
2020

Hospital de Clínicas da Unicamp
2013-2019

Universidade Federal do Rio Grande do Norte
2018

Montreal Neurological Institute and Hospital
2017

McGill University
2017

Universidade Federal de Pernambuco
2011

Universidade Positivo
2011

ABSTRACT Background Brain structure abnormalities throughout the course of Parkinson's disease have yet to be fully elucidated. Objective Using a multicenter approach and harmonized analysis methods, we aimed shed light on stage‐specific profiles pathology, as suggested by in vivo neuroimaging. Methods Individual brain MRI clinical data from 2357 patients 1182 healthy controls were collected 19 sources. We analyzed regional cortical thickness, surface area, subcortical volume using...

10.1002/mds.28706 article EN Movement Disorders 2021-07-20

ABSTRACT Although white matter damage may play a major role in the pathogenesis of spinocerebellar ataxia 3 (SCA3), available data rely exclusively upon macrostructural analyses. In this setting we designed study to investigate integrity. We evaluated 38 genetically‐confirmed SCA3 patients (mean age, 52.76 ± 12.70 years; 21 males) with clinical scales and brain magnetic resonance imaging (MRI) healthy subjects as control group 48.86 12.07 years, 20 male). All individuals underwent same...

10.1002/mds.25451 article EN Movement Disorders 2013-04-03

Background and purpose Machado−Joseph disease ( MJD / SCA 3) is the most frequent spinocerebellar ataxia, characterized by brainstem, basal ganglia cerebellar damage. Few magnetic resonance imaging based studies have investigated damage in cerebral cortex. The objective was to determine whether patients with 3 cortex atrophy, identify regions more susceptible look for clinical neuropsychological correlates of such lesions. Methods Forty‐nine (mean age 47.7 ± 13.0 years, 27 men) 49 matched...

10.1111/ene.12559 article EN European Journal of Neurology 2014-09-23

The progression of Parkinson's disease (PD) is associated with microstructural alterations in neural pathways, contributing to both motor and cognitive decline. However, conflicting findings have emerged due the use heterogeneous methods small studies. Here we performed a large diffusion MRI study PD, integrating data from 17 cohorts worldwide, identify stage-specific profiles white matter differences. Diffusion-weighted 1654 participants diagnosed PD (age: 20–89 years; 33% female) 885...

10.1038/s41531-024-00758-3 article EN cc-by-nc-nd npj Parkinson s Disease 2024-08-11

To estimate the clinical and demographics aspects that may contribute to cognitive impairment psychiatric symptoms in Parkinson's disease (PD).All patients answered a structured standardized questionnaire. Two movement disorders specialists performed following scale: Unified rating score (UPDRS), modified Hoehn Yahr staging, Schwab England Scale, SCOPA cognition (SCOPA-COG), SCOPA-Psychiatric complications (SCOPA-PC) Non-Motor Symptoms Scale (NMSS). We built generalized linear model assess...

10.1590/0004-282x20150016 article EN cc-by-nc Arquivos de Neuro-Psiquiatria 2015-05-01

Objectives: To assess white matter abnormalities in Parkinson's disease (PD). Methods: A hundred and thirty-two patients with PD (mean age 60.93 years; average duration 7.8 years) 137 healthy controls (HC; mean 57.8 underwent the same MRI protocol. Patients were assessed by clinical scales a complete neurological evaluation. We performed TBSS analysis to compare controls, we divided into early PD, moderate severe an ROI using tractography. Results: With found lower FA corpus callosum,...

10.3389/fneur.2018.00626 article EN cc-by Frontiers in Neurology 2018-08-21

Background: Parkinson's disease (PD) is progressive and affects different brain areas. Objectives: We aimed to describe structural functional changes in PD clinical stages. Methods: Sixty-six patients with (57.94±10.25 years) diagnosed according the UK Brain Bank criteria were included. performed a whole analysis using voxel-based morphometry (VBM-SPM 8 software), cortical thickness (CT) CIVET resting state-fMRI NIAK software compare controls. For VBM CT we classified subjects into three...

10.3389/fneur.2016.00243 article EN cc-by Frontiers in Neurology 2017-01-13
Zeena Shawa Cameron Shand Beatrice Taylor Henk W. Berendse Chris Vriend and 85 more Tim D. van Balkom Odile A. van den Heuvel Ysbrand D. van der Werf Jiun‐Jie Wang Chih‐Chien Tsai Jason Druzgal Benjamin T. Newman Tracy R. Melzer Toni L. Pitcher John C. Dalrymple‐Alford Tim Anderson Gaëtan Garraux Mario Rango Petra Schwingenschuh Melanie Suette Laura M. Parkes Sarah Al‐Bachari Johannes Klein Joshua Shulman Corey T. McMillan Fabrizio Piras Daniela Vecchio Clelia Pellicano Chencheng Zhang Kathleen L. Poston Elnaz Ghasemi Fernando Cendes Clarissa Lin Yasuda Duygu Tosun Philip Mosley Paul M. Thompson Neda Jahanshad Conor Owens‐Walton Emile d’Angremont Eva M. van Heese Max A. Laansma André Altmann Max A. Laansma Joanna K. Bright Sarah Al‐Bachari Tim Anderson Tyler Ard Francesca Assogna Katherine Baquero Henk W. Berendse Beth Newman Fernando Cendes John C. Dalrymple‐Alford Rob M.A. de Bie Ines Debove Michiel F. Dirkx Jason Druzgal Hedley Emsley Gaëtan Garraux Rachel Guimarães Boris A. Gutman Rick C. Helmich Johannes Klein Clare E. Mackay Corey T. McMillan Tracy R. Melzer Laura M. Parkes Fabrizio Piras Toni L. Pitcher Kathleen L. Poston Mario Rango Letícia Ribeiro Cristiane S. Rocha Christian Rummel Lucas S. R. Santos Reinhold Schmidt Petra Schwingenschuh Gianfranco Spalletta Letizia Squarcina Odile A. van den Heuvel Chris Vriend Jiun‐Jie Wang Daniel Weintraub Roland Wiest Clarissa Lin Yasuda Neda Jahanshad Paul M. Thompson Ysbrand D. van der Werf Rimona S. Weil Neil P. Oxtoby

Parkinson's disease is the second most common neurodegenerative disease. Despite this, there are no robust biomarkers to predict progression, and understanding of mechanisms limited. We used Subtype Stage Inference algorithm characterize heterogeneity in terms spatiotemporal subtypes macroscopic atrophy detectable on T1-weighted MRI-a successful approach other diseases. trained model covariate-adjusted cortical thicknesses subcortical volumes from largest known MRI dataset disease, Enhancing...

10.1093/braincomms/fcaf146 article EN cc-by Brain Communications 2025-01-01

Background Cognitive deficits in patients with asymptomatic carotid stenosis have been reported. The ultimate mechanism of cognitive remains unclear and might be related to subtle structural brain damage. Aims aim the present study was evaluate presence white grey matter abnormalities associated stenosis. Methods Twenty-five ≥70%/occlusion 25 healthy controls, matched for gender age, underwent 3 Tesla magnetic resonance imaging. Gray macrostructural were evaluated voxel-based morphometry...

10.1111/ijs.12574 article EN International Journal of Stroke 2015-08-02

Background: Huntington's disease (HD) is a progressive disorder characterized by motor, cognitive and psychiatric features. Cerebellar ataxia classically considered as uncommon in HD clinical spectrum. Objective: To determine the prevalence of cerebellar patients with HD, both early late stages HD. Methods: Seventy-two individuals eligible were assessed two trained doctors, applying Scale for Assessment Rating Ataxia (SARA) Brief (BARS) ataxia, Unified Disease (UHDRS) also, Barthel Index...

10.3389/fneur.2020.571843 article EN cc-by Frontiers in Neurology 2020-11-12

Background: Self-reported clinical worsening by people with Parkinson's disease (PD) during social distancing may be aggravated in Brazil, where the e/tele-health system is precarious. Objectives: This study aims to investigate self-reported changes motor and non-motor aspects PD living Brazil factors that might explain these changes. Methods: In this multicenter cross-sectional trial, 478 a diagnosis of idiopathic (mean age = 67, SD 9.5; 167 female) were recruited from 14 centers...

10.3389/fneur.2021.708433 article EN cc-by Frontiers in Neurology 2021-07-30

O escurecimento dentário intrínseco causado pela ingestão de tetraciclinas incomoda esteticamente o indivíduo.Estes antibióticos amplo espectro são usados no tratamento infecções como pneumonia, faringite, nas não complicadas do trato geniturinário, na cólera, diarreia, entre outras.É contraindicado em qualquer período gestação, lactação e para crianças abaixo oito anos idade, por produzir pigmentação dos dentes nos descendentes

10.15600/2238-1236/fol.v21n2p41-46 article PT Revista da Faculdade de Odontologia de Lins 2011-12-31

Background: Several neuroimaging studies revealed widespread neurodegeneration in Parkinson's disease but only few considered the asymmetrical clinical presentation. Objective: To investigate gray matter (GM) atrophy Parkinson Disease considering side of motor symptom onset. Methods: Sixty patients (57.87± 10.27 years) diagnosed according to Brain Bank criteria, 26 with right-sided onset (RDO) and 34 left-sided (LDO), were compared 80 healthy controls (HC) (57.1± 9.47 years). T1-weighted...

10.3389/fneur.2016.00145 article EN cc-by Frontiers in Neurology 2016-09-12

Abstract Background The progression of Parkinson’s disease (PD) is associated with microstructural alterations in neural pathways, contributing to both motor and cognitive decline. However, conflicting findings have emerged due the use heterogeneous methods small studies, particularly regarding involvement white matter (WM) tracts. Here we performed largest diffusion MRI study PD date, integrating data from 17 cohorts worldwide, identify stage-specific profiles WM differences. Methods...

10.1101/2024.01.16.24301235 preprint EN cc-by-nc-nd medRxiv (Cold Spring Harbor Laboratory) 2024-01-17

Dystonias are hyperkinetic movement disorders characterized by involuntary muscle contractions resulting in abnormal torsional movements and postures. Recent neuroimaging studies idiopathic craniocervical dystonia (CCD) have uncovered the involvement of multiple areas, including cortical ones. Our goal was to evaluate white matter (WM) microstructure subjects with CCD using diffusion tensor imaging (DTI) analysis.We compared 40 patients healthy controls. Patients were then divided into...

10.7916/d86972h6 article EN PubMed 2015-01-01

Dysphagia is a common symptom of Parkinson's disease (PD). A delay in laryngeal vestibule closure (LVC) and reduction tongue pressure, may affect swallowing safety increase the risk pulmonary aspiration.To verify relationship between pressure airway protection PD patients: (1) comparing measures physiological events pharyngeal phase controls (2) analysing association LVC group.Twenty-three patients with idiopathic (64.9 years) 24 healthy (64.1 participated this study. All participants...

10.1111/joor.13568 article EN Journal of Oral Rehabilitation 2023-08-21

Abstract Background Brain structure abnormalities throughout the course of Parkinson’s disease (PD) have yet to be fully elucidated. Inconsistent findings across studies may partly due small sample sizes and heterogeneous analysis methods. Using a multicenter approach harmonized methods, we aimed overcome these limitations shed light on stage-specific profiles PD pathology as suggested by in vivo neuroimaging. Methods Individual brain MRI clinical data from 2,367 patients 1,183 healthy...

10.1101/2020.04.28.20072710 preprint EN cc-by-nc-nd medRxiv (Cold Spring Harbor Laboratory) 2020-05-04

<strong>Background:</strong> Dystonias are hyperkinetic movement disorders characterized by involuntary muscle contractions resulting in abnormal torsional movements and postures. Recent neuroimaging studies idiopathic craniocervical dystonia (CCD) have uncovered the involvement of multiple areas, including cortical ones. Our goal was to evaluate white matter (WM) microstructure subjects with CCD using diffusion tensor imaging (DTI) analysis. <strong>Methods:</strong> We compared 40 patients...

10.5334/tohm.249 article EN cc-by Tremor and Other Hyperkinetic Movements 2015-05-28

Este estudo tem o intuito de mensurar conhecimento e experiências individuais dos entrevistados sobre tema Manifestações neurofisiológicas nos distúrbios ansiedade no ambiente acadêmico da Unifoa, bem como identificar os indivíduos acometidos pelos transtornos ansiedade, sintomas sofridos por fim sugerir ferramentas oferecidas pela instituição, CAIP (Centro aperfeiçoamento inovação pedagógica) para acolhimento oitiva com psicólogo instituição. Para tanto, foi utilizado método coleta dados um...

10.47385/interfaces..4628.2.2023 article PT Interfaces em Ciências da Saúde 2024-03-05

Este estudo tem o intuito de mensurar conhecimento e experiências individuais dos entrevistados sobre tema Manifestações neurofisiológicas nos distúrbios ansiedade no ambiente acadêmico da Unifoa, bem como identificar os indivíduos acometidos pelos transtornos ansiedade, sintomas sofridos por fim sugerir ferramentas oferecidas pela instituição, CAIP (Centro aperfeiçoamento inovação pedagógica) para acolhimento oitiva com psicólogo instituição. Para tanto, foi utilizado método coleta dados um...

10.47385/interfaces.4628.2.2023 article PT Interfaces em Ciências da Saúde 2024-03-05

Abstract Alterations in subcortical brain regions are linked to motor and non-motor symptoms Parkinson’s disease (PD). However, associations between clinical expression regional morphological abnormalities of the basal ganglia, thalamus, amygdala hippocampus not well established. We analyzed 3D T1-weighted MRI data from 2525 individuals with PD 1326 controls 22 global sources ENIGMA-PD consortium. investigated effects using mass univariate multivariate models on medial thickness 27,120...

10.1038/s41531-024-00825-9 article EN cc-by npj Parkinson s Disease 2024-11-18
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