Fmri
Mostrando 1-12 de 142 artigos, teses e dissertações.
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1. Adolescent depression and resting-state fMRI brain networks: a scoping review of longitudinal studies
The neurobiological factors associated with the emergence of major depressive disorder (MDD) in adolescence are still unclear. Previous cross-sectional studies have documented aberrant connectivity in resting-state functional magnetic resonance imaging (rs-fMRI) networks. However, whether these findings precede MDD onset has not been established. This scopin
Brazilian Journal of Psychiatry. Publicado em: 2022
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2. THE EXPLORATORY DIMENSION OF FMRI EXPERIMENTS
Abstract Driven by an appreciation of the field’s early stage of development, I apply the concept of exploratory experimentation, originally put forward in the late 90s philosophy of biology, to current research in cognitive neuroscience. I concentrate on functional magnetic resonance imaging and how this wide-spread technique is used, from experimental de
Manuscrito. Publicado em: 2021-03
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3. Association between poor tolerability of antidepressant treatment and brain functional activation in youth at risk for bipolar disorder
Objective: To investigate whether poor antidepressant tolerability is associated with functional brain changes in children and adolescents of parents with bipolar I disorder (at-risk youth). Methods: Seventy-three at-risk youth (ages 9-20 years old) who participated in a prospective study and had an available baseline functional magnetic resonance imaging
Braz. J. Psychiatry. Publicado em: 2021-02
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4. Neuroimaging adolescents with depression in a middle-income country: feasibility of an fMRI protocol and preliminary results
Objective: To test the feasibility and to present preliminary results of a neuroimaging protocol to evaluate adolescent depression in a middle-income setting. Methods: We assessed psychotropic medication-free adolescents (age range 14-16 years) with a diagnosis of major depressive disorder (MDD). Participants underwent a comprehensive clinical evaluation a
Braz. J. Psychiatry. Publicado em: 2020-02
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5. Neuroimaging adolescents with depression in a middle-income country: feasibility of an fMRI protocol and preliminary results
Objective: To test the feasibility and to present preliminary results of a neuroimaging protocol to evaluate adolescent depression in a middle-income setting. Methods: We assessed psychotropic medication-free adolescents (age range 14-16 years) with a diagnosis of major depressive disorder (MDD). Participants underwent a comprehensive clinical evaluation a
Braz. J. Psychiatry. Publicado em: 05/08/2019
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6. A study on changes of the resting-state brain function network in patients with amnestic mild cognitive impairment
This study aimed to explore the structural and functional characteristics of the neural network of resting-state brain activities in patients with amnestic mild cognitive impairment (aMCI) by functional magnetic resonance imaging (fMRI) technology. Resting state fMRI scanning was performed on 10 clinically diagnosed aMCI patients and 10 healthy volunteers, a
Braz J Med Biol Res. Publicado em: 29/04/2019
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7. O que a Neurociência tem a nos dizer (ou ainda não) sobre o processamento da metáfora?
Resumo: As pesquisas com neuroimagem acerca do processamento da metáfora apresentam achados distintos, o que implica dificuldades na formulação de um paradigma teórico de base neurológica da metáfora. Neste estudo, argumentamos que a falta de clareza de aspectos conceituais sobre a metáfora sob uma perspectiva linguística implica diversidades no dese
Let. Hoje. Publicado em: 2018-03
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8. Performance quantification of clustering algorithms for false positive removal in fMRI by ROC curves
Abstract Introduction Functional magnetic resonance imaging (fMRI) is a non-invasive technique that allows the detection of specific cerebral functions in humans based on hemodynamic changes. The contrast changes are about 5%, making visual inspection impossible. Thus, statistic strategies are applied to infer which brain region is engaged in a task. Howeve
Res. Biomed. Eng.. Publicado em: 2017-03
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9. Cerebral vasomotor reactivity assessment using Transcranial Doppler and MRI with apnea test
Differently from previous studies that used Transcranial Doppler (TCD) and functional MRI (fMRI) for cerebral vasomotor reactivity (CVR) assessment in patients with carotid stenosis (CS), we assessed CVR using an identical stimulus, the Breath-Holding Test (BHT). We included 15 patients with CS and 7 age-matched controls to verify whether fMRI responded diff
Braz J Med Biol Res. Publicado em: 24/10/2016
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10. Estudos comportamentais e de neuroimagem sobre multitarefa: uma revisão de literatura
RESUMO Esta revisão de literatura objetiva articular evidências de estudos comportamentais e de neuroimagem que têm sido conduzidos sobre multitarefa, nos quais pelo menos uma das tarefas envolve linguagem. De forma bem simples, ser multitarefa é lidar com mais de uma tarefa ao mesmo tempo. Achados de seis estudos comportamentais e de cinco estudos de ne
Alfa, rev. linguíst. (São José Rio Preto). Publicado em: 2016-08
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11. Regiões do cérebro relacionadas à melhora da memória verbal em idosos saudáveis
Apesar do crescente interesse em intervenções de treinamento cognitivo para minimizar o declínio cognitivo do envelhecimento, nenhum estudo explorou quais regiões do cérebro estão relacionadas à aplicação de estratégias semânticas durante a codificação da memória verbal. Nosso objetivo foi investigar o comportamento e correlatos cerebrais assoc
Arq. Neuro-Psiquiatr.. Publicado em: 2014-09
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12. The link between cardiovascular risk, Alzheimer's disease, and mild cognitive impairment: support from recent functional neuroimaging studies
Objective: To review functional neuroimaging studies about the relationship between cardiovascular risk factors (CVRFs), Alzheimer's disease (AD), and mild cognitive impairment (MCI). Methods: We performed a comprehensive literature search to identify articles in the neuroimaging field addressing CVRF in AD and MCI. We included studies that used positron em
Rev. Bras. Psiquiatr.. Publicado em: 10/06/2014