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Divergent patterns of loss of interpersonal warmth in frontotemporal dementia syndromes are predicted by altered intrinsic network connectivity.
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Divergent patterns of loss of interpersonal warmth in frontotemporal dementia syndromes are predicted by altered intrinsic network connectivity.
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The Environment and Child Development: A Multivariate Approach ...
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Johnson, Amy. - : Apollo - University of Cambridge Repository, 2019
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The Environment and Child Development: A Multivariate Approach
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Johnson, Amy. - : University of Cambridge, 2019. : MRC Cognition and Brain Sciences Unit II, 2019. : Hughes Hall, 2019
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Motor and language resting state functional magnetic resonance imaging in brain tumor patients
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Dynamics of spontaneous alpha activity correlate with language ability in young children
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In: Communication Sciences and Disorders Publications (2019)
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Differential language network functional connectivity alterations in Alzheimer's disease and the semantic variant of primary progressive aphasia
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Abstract:
Patients with Alzheimer's disease (AD) and semantic variant primary progressive aphasia (svPPA) can present with similar language impairments, mainly in naming. It has been hypothesized that these deficits are associated with different brain mechanisms in each disease, but no previous study has used a network approach to explore this hypothesis. The aim of this study was to compare resting-state functional magnetic resonance imaging (rs-fMRI) language network in AD, svPPA patients, and cognitively unimpaired elderly adults (CTRL). Therefore, 10 AD patients, 12 svPPA patients and 11 CTRL underwent rs-fMRI. Seed-based functional connectivity analyses were conducted using regions of interest in the left anterior temporal lobe (ATL), left posterior middle temporal gyrus (pMTG) and left inferior frontal gyrus (IFG), applying a voxelwise correction for gray matter volume. In AD patients, the left pMTG was the only key language region showing functional connectivity changes, mainly a reduced interhemispheric functional connectivity with its right-hemisphere counterpart, in comparison to CTRL. In svPPA patients, we observed a functional isolation of the left ATL, both decreases and increases in functional connectivity from the left pMTG and increased functional connectivity form the left IFG. Post-hoc analyses showed that naming impairments were overall associated with the functional disconnections observed across the language network. In conclusion, AD and svPPA patients present distinct language network functional connectivity profiles. In AD patients, functional connectivity changes were restricted to the left pMTG and were overall less severe in comparison to svPPA patients. Results in svPPA patients suggest decreased functional connectivity along the ventral language pathway and increased functional connectivity along the dorsal language pathway. Finally, the observed connectivity patterns are overall consistent with previously reported structural connectivity and language profiles in these patients.
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Keyword:
Alzheimer's disease; Language network; Resting-state functional magnetic resonance imaging; Semantic variant primary progressive aphasia
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URL: https://doi.org/10.1016/j.cortex.2019.03.018 http://hdl.handle.net/1866/24999
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The role of the hippocampus in the semantic variant of primary progressive aphasia : a resting‐state fcMRI study
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Corrélats neurofonctionnels des habiletés lexico-sémantiques selon le décours et les expériences de vie
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Spontaneous Neural Activity in the Superior Temporal Gyrus Recapitulates Tuning for Speech Features.
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Cluster analysis with MOODS‐SR illustrates a potential bipolar disorder risk phenotype in young adults with remitted major depressive disorder
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Resting State Networks in Individuals with and without Reading Disorders
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Grandmont, Dana M. - : University of Alberta. Department of Communication Sciences and Disorders., 2018
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Desarrollo de una metodología para la determinación automática de alteraciones estructurales y funcionales en el cerebro mediante el procesamiento de imágenes de resonancia magnética.
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Varieties of semantic cognition revealed through simultaneous decomposition of intrinsic brain connectivity and behaviour
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In: ISSN: 1053-8119 ; EISSN: 1095-9572 ; NeuroImage ; https://hal.archives-ouvertes.fr/hal-01546394 ; NeuroImage, Elsevier, 2017, pp.34. ⟨10.1016/j.neuroimage.2017.06.067⟩ (2017)
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On the role of the corpus callosum in interhemispheric functional connectivity in humans.
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In: Proceedings of the National Academy of Sciences of the United States of America, vol 114, iss 50 (2017)
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Relationship between individual differences in functional connectivity and facial emotion recognition abilities in traumatic brain injury
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In: Communication Disorders Faculty Research (2017)
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Simultaneous learning of two languages from birth positively impacts intrinsic functional connectivity and cognitive control
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In: Brain and Cognition ; Volume 117 ; Pages 49-56. (2017)
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Cross-cultural consistency and diversity in intrinsic functional organization of Broca's Region
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Decreased cerebellar-orbitofrontal connectivity correlates with stuttering severity: whole-brain functional and structural connectivity associations with persistent developmental stuttering
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Intrinsic Functional Connectivity in the Adult Brain and Success in Second-Language Learning
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In: http://www.jneurosci.org/content/36/3/755 ; Journal of Neuroscience 20 January 2016 ; 36 (3) 755-761 (2016)
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