23 research outputs found
El fasc铆culo longitudinal inferior en la afasia progresiva primaria variante sem谩ntica
Se presenta un paciente con una afasia progresiva primaria de tipo semantica al cual se le realiz贸 una resonancia magnetica con secuencias de tensor de difusion聽donde se evidencia alteracion funcional a nivel del lobulo temporal izquierdo en las fibras de conducci贸n (fasciculo longitudinal inferior). Se realiza la discusion sobre la importancia de este fasciculo en el sistema semantico.Fil: Chrem Mendez, Patricio Alexis. Fundaci贸n para la Lucha contra las Enfermedades Neurol贸gicas de la Infancia; ArgentinaFil: Amengual, Alejandra. Fundaci贸n para la Lucha contra las Enfermedades Neurol贸gicas de la Infancia; ArgentinaFil: Meli, Francisco. Fundaci贸n para la Lucha contra las Enfermedades Neurol贸gicas de la Infancia; ArgentinaFil: De Pino, Gabriela. Fundaci贸n para la Lucha contra las Enfermedades Neurol贸gicas de la Infancia; ArgentinaFil: Sevlever, Gustavo. Fundaci贸n para la Lucha contra las Enfermedades Neurol贸gicas de la Infancia; ArgentinaFil: V谩zquez, Silvia. Fundaci贸n para la Lucha contra las Enfermedades Neurol贸gicas de la Infancia; ArgentinaFil: Allegri, Ricardo Francisco. Consejo Nacional de Investigaciones Cient铆ficas y T茅cnicas; Argentina. Fundaci贸n para la Lucha contra las Enfermedades Neurol贸gicas de la Infancia; Argentin
Cognitive reserve and A尾I-42 in mild cognitive impairment (Argentina-Alzheimer鈥檚 disease neuroimaging initiative)
Background: The purpose of this study was to investigate the relationship between cognitive reserve and concentration of A尾1-42 in the cerebrospinal fluid (CSF) of patients with mild cognitive impairment, those with Alzheimer鈥檚 disease, and in control subjects. Methods: Thirty-three participants from the Argentina-Alzheimer鈥檚 Disease Neuroimaging Initiative database completed a cognitive battery, the Cognitive Reserve Questionnaire (CRQ), and an Argentinian accentuation reading test (TAP-BA) as a measure of premorbid intelligence, and underwent lumbar puncture for CSF biomarker quantification. Results: The CRQ significantly correlated with TAP-BA, education, and A尾1-42. When considering A尾1-42 levels, significant differences were found in CRQ scores; higher levels of CSF A尾1-42 were associated with higher CRQ scores. Conclusion: Reduced A尾1-42 in CSF is considered as evidence of amyloid deposition in the brain. Previous results suggest that individuals with higher education, higher occupational attainment, and participation in leisure activities (cognitive reserve) have a reduced risk of developing Alzheimer鈥檚 disease. Our results support the notion that enhanced neural activity has a protective role in mild cognitive impairment, as evidenced by higher CSF A尾1-42 levels in individuals with more cognitive reserve.Fil: Harris, Paula. Consejo Nacional de Investigaciones Cient铆ficas y T茅cnicas; Argentina. Fundaci贸n para la Lucha Contra las Enfermedades Neurol贸gicas de la Infancia. Instituto de Investigaciones Neurol贸gicas "Ra煤l Carrea"; ArgentinaFil: Suarez, Marcos Fernandez. Fundaci贸n para la Lucha Contra las Enfermedades Neurol贸gicas de la Infancia. Instituto de Investigaciones Neurol贸gicas "Ra煤l Carrea"; ArgentinaFil: Surace, Ezequiel Ignacio. Fundaci贸n para la Lucha Contra las Enfermedades Neurol贸gicas de la Infancia. Instituto de Investigaciones Neurol贸gicas "Ra煤l Carrea"; Argentina. Consejo Nacional de Investigaciones Cient铆ficas y T茅cnicas; ArgentinaFil: Chrem Mendez, Patricio Alexis. Fundaci贸n para la Lucha Contra las Enfermedades Neurol贸gicas de la Infancia. Instituto de Investigaciones Neurol贸gicas "Ra煤l Carrea"; ArgentinaFil: Mart铆n, Mar铆a Eugenia. Fundaci贸n para la Lucha Contra las Enfermedades Neurol贸gicas de la Infancia. Instituto de Investigaciones Neurol贸gicas "Ra煤l Carrea"; ArgentinaFil: Clarens, Mar铆a Florencia. Fundaci贸n para la Lucha Contra las Enfermedades Neurol贸gicas de la Infancia. Instituto de Investigaciones Neurol贸gicas "Ra煤l Carrea"; ArgentinaFil: Tapajoz Pereira de Sampaio, Fernanda. Fundaci贸n para la Lucha Contra las Enfermedades Neurol贸gicas de la Infancia. Instituto de Investigaciones Neurol贸gicas "Ra煤l Carrea"; Argentina. Consejo Nacional de Investigaciones Cient铆ficas y T茅cnicas; ArgentinaFil: Russo, Mar铆a Julieta. Fundaci贸n para la Lucha Contra las Enfermedades Neurol贸gicas de la Infancia. Instituto de Investigaciones Neurol贸gicas "Ra煤l Carrea"; ArgentinaFil: Campos, Jorge. Fundaci贸n para la Lucha Contra las Enfermedades Neurol贸gicas de la Infancia. Instituto de Investigaciones Neurol贸gicas "Ra煤l Carrea"; ArgentinaFil: Guinjoan, Salvador Mart铆n. Consejo Nacional de Investigaciones Cient铆ficas y T茅cnicas; Argentina. Fundaci贸n para la Lucha Contra las Enfermedades Neurol贸gicas de la Infancia. Instituto de Investigaciones Neurol贸gicas "Ra煤l Carrea"; ArgentinaFil: Sevlever, Gustavo. Fundaci贸n para la Lucha Contra las Enfermedades Neurol贸gicas de la Infancia. Instituto de Investigaciones Neurol贸gicas "Ra煤l Carrea"; ArgentinaFil: Allegri, Ricardo Francisco. Consejo Nacional de Investigaciones Cient铆ficas y T茅cnicas; Argentina. Fundaci贸n para la Lucha Contra las Enfermedades Neurol贸gicas de la Infancia. Instituto de Investigaciones Neurol贸gicas "Ra煤l Carrea"; Argentin
CONDU脟脙O E DOEN脟A DE ALZHEIMER: UMA BATERIA DE TRIAGEM NEUROPSICOL脫GICA PARA IDOSOS
As life expectancy increases, there is a marked increase in the elderly population eager to continue driving. A large proportion of these elderly drive safely, however, patients with mild dementia are high-risk drivers.
Objective:
to identify the cognitive tests that best predict driving ability in subjects with mild dementia.
Methods:
28 drivers with mild dementia and 28 healthy elderly subjects underwent an extensive cognitive assessment (NACC Uniform Data Set Neuropsychological Battery), completed an adapted On Road Driving Test (ORDT) and a Driving Simulator assessment.
Results:
drivers with mild dementia made more mistakes on the ORDT and had slower responses in the simulator tasks. Cognitive tests correlated strongly with on road and simulator driving performance. Age, the Digit Symbol Modalities Test and Boston Naming Test scores were the variables that best predicted performance on the ORDT and were included in a logistic regression model.
Conclusion:
the strong correlation between driving performance and performance on specific cognitive tests supports the importance of cognitive assessment as a useful tool for deciding whether patients with mild dementia can drive safely. The algorithm including these three variables could be used as a screening tool for the detection of unsafe driving in elderly subjects with cognitive decline
Predicting episodic memory performance using different biomarkers: Results from Argentina-Alzheimer鈥檚 disease neuroimaging initiative
Purpose: Argentina-Alzheimer鈥檚 Disease Neuroimaging Initiative (Arg-ADNI) is the first ADNI study to be performed in Latin America at a medical center with the appropriate infrastructure. Our objective was to describe baseline characteristics and to examine whether biomarkers related to Alzheimer鈥檚 disease (AD) physiopathology were associated with worse memory performance. Patients and methods: Fifteen controls and 28 mild cognitive impairment and 13 AD dementia subjects were included. For Arg-ADNI, all biomarker parameters and neuropsychological tests of ADNI-II were adopted. Results of positron emission tomography (PET) with fluorodeoxyglucose and11C-Pittsburgh compound-B (PIB-PET) were available from all participants. Cerebrospinal fluid biomarker results were available from 39 subjects. Results: A total of 56 participants were included and underwent baseline evaluation. The three groups were similar with respect to years of education and sex, and they differed in age (F=5.10, P=0.01). Mean scores for the baseline measurements of the neuropsychological evaluation differed significantly among the three groups at P0.1). Baseline amyloid deposition and left hippocampal volume separated the three diagnostic groups and correlated with the memory performance (P<0.001). Conclusion: Cross-sectional analysis of baseline data revealed links between cognition, structural changes, and biomarkers. Follow-up of a larger and more representative cohort, particularly analyzing cerebrospinal fluid and brain biomarkers, will allow better characterization of AD in our country.Fil: Russo, Mar铆a Julieta. Fundaci贸n para la Lucha contra las Enfermedades Neurol贸gicas de la Infancia; ArgentinaFil: Cohen, Gabriela. Fundaci贸n para la Lucha contra las Enfermedades Neurol贸gicas de la Infancia; ArgentinaFil: Chrem Mendez, Patricio Alexis. Fundaci贸n para la Lucha contra las Enfermedades Neurol贸gicas de la Infancia; ArgentinaFil: Campos, Jorge. Fundaci贸n para la Lucha contra las Enfermedades Neurol贸gicas de la Infancia; ArgentinaFil: Nahas, Federico Exequiel. Fundaci贸n para la Lucha contra las Enfermedades Neurol贸gicas de la Infancia; Argentina. Consejo Nacional de Investigaciones Cient铆ficas y T茅cnicas. Oficina de Coordinaci贸n Administrativa Houssay; ArgentinaFil: Surace, Ezequiel Ignacio. Consejo Nacional de Investigaciones Cient铆ficas y T茅cnicas. Oficina de Coordinaci贸n Administrativa Houssay; Argentina. Fundaci贸n para la Lucha contra las Enfermedades Neurol贸gicas de la Infancia; ArgentinaFil: Vazquez, Silvia. Fundaci贸n para la Lucha contra las Enfermedades Neurol贸gicas de la Infancia; ArgentinaFil: Gustafson, Deborah. University of New York; Estados UnidosFil: Guinjoan, Salvador Mart铆n. Consejo Nacional de Investigaciones Cient铆ficas y T茅cnicas. Oficina de Coordinaci贸n Administrativa Houssay; Argentina. Fundaci贸n para la Lucha contra las Enfermedades Neurol贸gicas de la Infancia; ArgentinaFil: Allegri, Ricardo Francisco. Consejo Nacional de Investigaciones Cient铆ficas y T茅cnicas. Oficina de Coordinaci贸n Administrativa Houssay; Argentina. Fundaci贸n para la Lucha contra las Enfermedades Neurol贸gicas de la Infancia; ArgentinaFil: Sevlever, Gustavo. Fundaci贸n para la Lucha contra las Enfermedades Neurol贸gicas de la Infancia; Argentin
Concordance between 11C-PIB-PET and clinical diagnosis in a memory clinic
Introduction: Today, ligands that bind to fibrillar 尾-amyloid are detectable by Positron Emission Tomography (PET) allowing for in vivo visualization for Abeta burden. However, amyloid plaques detection per se does not establish Alzheimer's Disease diagnosis. In this sense, the utility of amyloid imaging to improve clinical diagnosis was settled only for specific clinical scenarios and few studies have assessed amyloid molecular neuroimaging in a broader clinical setting. The aim of this study is to determine the frequency of PiB amyloid findings in different diagnostic syndromes grouped into high and low probability pre- test categories, taking into account pre-test clinical assumption of the presence of AD related pathology. Methods: 144 patients were assigned into categories of high or low pretest probability according to clinical suspicion of AD pathology. The high probability group included: amnestic Mild Cognitive Impairment (MCI), amnestic and other domains MCI, Dementia of Alzheimer's Type (DAT), Posterior Cortical Atrophy (PCA), logopenic Primary Progressive Aphasia (PPA), Cerebral Amyloid Angiopathy and mixed dementia. The low assumption group included: normal controls, non-amnestic MCI, non-logopenic PPA and Frontotemporal Dementia (FTD). Results: Only normal controls and DAT patients (typical and atypical presentation) were the most consistent across clinical and molecular diagnostics. MCI, non-logopenic PPA and FTD were the syndromic diagnoses that most discrepancies were found. Discussion: This study demonstrates that detecting in vivo amyloid plaques by molecular imaging is considerably frequent in most of the dementia syndromes and shows that there are frequent discordance between molecular diagnosis and clinical assumption.Fil: Chrem Mendez, Patricio Alexis. Fundaci贸n para la Lucha Contra las Enfermedades Neurol贸gicas de la Infancia. Instituto de Investigaciones Neurol贸gicas "Ra煤l Carrea"; ArgentinaFil: Cohen, Gabriela. Fundaci贸n para la Lucha Contra las Enfermedades Neurol贸gicas de la Infancia. Instituto de Investigaciones Neurol贸gicas "Ra煤l Carrea"; ArgentinaFil: Russo, Mar铆a Julieta. Fundaci贸n para la Lucha Contra las Enfermedades Neurol贸gicas de la Infancia. Instituto de Investigaciones Neurol贸gicas "Ra煤l Carrea"; ArgentinaFil: Fernandez Suarez, Marcos. Fundaci贸n para la Lucha Contra las Enfermedades Neurol贸gicas de la Infancia. Instituto de Investigaciones Neurol贸gicas "Ra煤l Carrea"; ArgentinaFil: Nahas, Federico Exequiel. Fundaci贸n para la Lucha Contra las Enfermedades Neurol贸gicas de la Infancia. Instituto de Investigaciones Neurol贸gicas "Ra煤l Carrea"; Argentina. Consejo Nacional de Investigaciones Cient铆ficas y T茅cnicas; ArgentinaFil: Russo, Griselda. Fundaci贸n para la Lucha Contra las Enfermedades Neurol贸gicas de la Infancia. Instituto de Investigaciones Neurol贸gicas "Ra煤l Carrea"; ArgentinaFil: Wierszylo, Claudio. Fundaci贸n para la Lucha Contra las Enfermedades Neurol贸gicas de la Infancia. Instituto de Investigaciones Neurol贸gicas "Ra煤l Carrea"; ArgentinaFil: Paz, Santiago Rodrigo. Fundaci贸n para la Lucha Contra las Enfermedades Neurol贸gicas de la Infancia. Instituto de Investigaciones Neurol贸gicas "Ra煤l Carrea"; ArgentinaFil: Tabaschi, Leonardo. Fundaci贸n para la Lucha Contra las Enfermedades Neurol贸gicas de la Infancia. Instituto de Investigaciones Neurol贸gicas "Ra煤l Carrea"; ArgentinaFil: Campos, Jorge. Fundaci贸n para la Lucha Contra las Enfermedades Neurol贸gicas de la Infancia. Instituto de Investigaciones Neurol贸gicas "Ra煤l Carrea"; ArgentinaFil: Amengual, Alejandra. Fundaci贸n para la Lucha Contra las Enfermedades Neurol贸gicas de la Infancia. Instituto de Investigaciones Neurol贸gicas "Ra煤l Carrea"; ArgentinaFil: Kremer, Janus. Fundaci贸n para la Lucha Contra las Enfermedades Neurol贸gicas de la Infancia. Instituto de Investigaciones Neurol贸gicas "Ra煤l Carrea"; ArgentinaFil: Guinjoan, Salvador Mart铆n. Consejo Nacional de Investigaciones Cient铆ficas y T茅cnicas; Argentina. Fundaci贸n para la Lucha Contra las Enfermedades Neurol贸gicas de la Infancia. Instituto de Investigaciones Neurol贸gicas "Ra煤l Carrea"; ArgentinaFil: Leiguarda, Ram贸n Carlos. Fundaci贸n para la Lucha Contra las Enfermedades Neurol贸gicas de la Infancia. Instituto de Investigaciones Neurol贸gicas "Ra煤l Carrea"; ArgentinaFil: Sevlever, Gustavo. Fundaci贸n para la Lucha Contra las Enfermedades Neurol贸gicas de la Infancia. Instituto de Investigaciones Neurol贸gicas "Ra煤l Carrea"; ArgentinaFil: Vazquez, Silvia Ester. Fundaci贸n para la Lucha Contra las Enfermedades Neurol贸gicas de la Infancia. Instituto de Investigaciones Neurol贸gicas "Ra煤l Carrea"; ArgentinaFil: Allegri, Ricardo Francisco. Consejo Nacional de Investigaciones Cient铆ficas y T茅cnicas; Argentina. Fundaci贸n para la Lucha Contra las Enfermedades Neurol贸gicas de la Infancia. Instituto de Investigaciones Neurol贸gicas "Ra煤l Carrea"; Argentin
Advancements in dementia research, diagnostics and care in Latin America : highlights from the 2023 Alzheimer's association international conference satellite symposium in Mexico City
While Latin America (LatAm) is facing an increasing burden of dementia due to the rapid aging of the population, it remains underrepresented in dementia research, diagnostics and care. In 2023, the Alzheimer鈥檚 Association hosted its eighth Satellite Symposium in Mexico, highlighting emerging dementia research, priorities, and challenges within LatAm. A wide range of topics were covered, including epidemiology, social determinants, dementia national plans, risk reduction, genetics, biomarkers, biobanks, and advancements in treatments. Large initiatives in the region including intra-country support showcased their efforts in fostering national and international collaborations; genetic studies unveiled the unique genetic admixture in LatAm; emerging clinical trials discussed ongoing culturally specific interventions; and the urgent need to harmonize practices and studies, improve diagnosis and care and implement affordable biomarkers in the region was highlighted
Una mirada retrospectiva a un paciente t铆pico con quejas de memoria
The purpose of these images is to extol the biological perspective from the clinical setting perspective of a typical AD case. This participant was profoundly studied and also followed-up for five years in the study ADNI- Argentin
Una mirada retrospectiva a un paciente t铆pico con quejas de memoria
The purpose of these images is to extol the biological perspective from the clinical setting perspective of a typical AD case. This participant was profoundly studied and also followed-up for five years in the study ADNI- Argentin
驴Qu茅 riesgo tengo de heredar la enfermedad de Alzheimer? Gen茅tica y demencias
Fil: Chrem Mendez, Patricio Alexis. Fundaci贸n para la Lucha Contra las Enfermedades Neurol贸gicas de la Infancia. Instituto de Investigaciones Neurol贸gicas "Ra煤l Carrea"; ArgentinaFil: Surace, Ezequiel Ignacio. Fundaci贸n para la Lucha Contra las Enfermedades Neurol贸gicas de la Infancia. Instituto de Investigaciones Neurol贸gicas "Ra煤l Carrea"; Argentina. Consejo Nacional de Investigaciones Cient铆ficas y T茅cnicas; Argentin
El fasc铆culo longitudinal inferior en la afasia progresiva primaria variante sem谩ntica
Se presenta un paciente con una afasia progresiva primaria de tipo semantica al cual se le realiz贸 una resonancia magnetica con secuencias de tensor de difusion聽donde se evidencia alteracion funcional a nivel del lobulo temporal izquierdo en las fibras de conducci贸n (fasciculo longitudinal inferior). Se realiza la discusion sobre la importancia de este fasciculo en el sistema semantico.Fil: Chrem Mendez, Patricio Alexis. Fundaci贸n para la Lucha contra las Enfermedades Neurol贸gicas de la Infancia; ArgentinaFil: Amengual, Alejandra. Fundaci贸n para la Lucha contra las Enfermedades Neurol贸gicas de la Infancia; ArgentinaFil: Meli, Francisco. Fundaci贸n para la Lucha contra las Enfermedades Neurol贸gicas de la Infancia; ArgentinaFil: De Pino, Gabriela. Fundaci贸n para la Lucha contra las Enfermedades Neurol贸gicas de la Infancia; ArgentinaFil: Sevlever, Gustavo. Fundaci贸n para la Lucha contra las Enfermedades Neurol贸gicas de la Infancia; ArgentinaFil: V谩zquez, Silvia. Fundaci贸n para la Lucha contra las Enfermedades Neurol贸gicas de la Infancia; ArgentinaFil: Allegri, Ricardo Francisco. Consejo Nacional de Investigaciones Cient铆ficas y T茅cnicas; Argentina. Fundaci贸n para la Lucha contra las Enfermedades Neurol贸gicas de la Infancia; Argentin