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Sabayan B, Wyman-Chick KA, Sedaghat S. The Burden of Dementia Spectrum Disorders and Associated Comorbid and Demographic Features. Clin Geriatr Med 2023; 39:1-14. [PMID: 36404023 DOI: 10.1016/j.cger.2022.07.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Dementia spectrum disorders (DSDs) are a major cause of mortality and disability worldwide. DSDs encompass a large group of medical conditions that all ultimately lead to major functional and cognitive decline and disability. Demographic and comorbid conditions that are associated with DSDs have significant prognostic and preventive implications. In this article, we will discuss the global and regional burden of DSDs and cover key demographic and clinical conditions linked with DSDs. In the absence of disease-modifying treatments, the role of primary prevention has become more prominent. Implementation of preventive measures requires an understanding of predisposing and exacerbating factors.
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Affiliation(s)
- Behnam Sabayan
- Department of Neurology, HealthPartners Neuroscience Center, 295 Phalen Boulevard, St Paul, MN 55130, USA; Division of Epidemiology and Community Health, School of Public Health, University of Minnesota, 1300 S Second Street, Suite 300, Minneapolis, MN 55454, USA.
| | - Kathryn A Wyman-Chick
- Department of Neurology, HealthPartners Neuroscience Center, 295 Phalen Boulevard, St Paul, MN 55130, USA
| | - Sanaz Sedaghat
- Division of Epidemiology and Community Health, School of Public Health, University of Minnesota, 1300 S Second Street, Suite 300, Minneapolis, MN 55454, USA
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Sex influences clinical phenotype in frontotemporal dementia. Neurol Sci 2022; 43:5281-5287. [PMID: 35672480 PMCID: PMC9385756 DOI: 10.1007/s10072-022-06185-7] [Citation(s) in RCA: 13] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2022] [Accepted: 05/28/2022] [Indexed: 12/02/2022]
Abstract
Introduction Frontotemporal dementia (FTD) encompasses a wide spectrum of genetic, clinical, and histological findings. Sex is emerging as a potential biological variable influencing FTD heterogeneity; however, only a few studies explored this issue with nonconclusive results. Objective To estimate the role of sex in a single-center large cohort of FTD patients. Methods Five hundred thirty-one FTD patients were consecutively enrolled. Demographic, clinical, and neuropsychological features, survival rate, and serum neurofilament light (NfL) concentration were determined and compared between sex. Results The behavioral variant of FTD was more common in men, whereas primary progressive aphasia was overrepresented in women (p < 0.001). While global cognitive impairment was comparable, females had a more severe cognitive impairment, namely in Trail Making Test parts A and B (p = 0.003), semantic fluency (p = 0.03), Short Story Recall Test (p = 0.003), and the copy of Rey Complex Figure (p = 0.005). On the other hand, men exhibited more personality/behavioral symptoms (Frontal Behavior Inventory [FBI] AB, p = 0.003), displaying higher scores in positive FBI subscales (FBI B, p < 0.001). In particular, apathy (p = 0.02), irritability (p = 0.006), poor judgment (p = 0.033), aggressivity (p = 0.008), and hypersexuality (p = 0.006) were more common in men, after correction for disease severity. NfL concentration and survival were not statistically different between men and women (p = 0.167 and p = 0.645, respectively). Discussion The present study demonstrated that sex is a potential factor in determining FTD phenotype, while it does not influence survival. Although the pathophysiological contribution of sex in neurodegeneration is not well characterized yet, our findings highlight its role as deserving biological variable in FTD. Supplementary Information The online version contains supplementary material available at 10.1007/s10072-022-06185-7.
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Salminen LE, Tubi MA, Bright J, Thomopoulos SI, Wieand A, Thompson PM. Sex is a defining feature of neuroimaging phenotypes in major brain disorders. Hum Brain Mapp 2022; 43:500-542. [PMID: 33949018 PMCID: PMC8805690 DOI: 10.1002/hbm.25438] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2020] [Revised: 03/22/2021] [Accepted: 03/23/2021] [Indexed: 12/12/2022] Open
Abstract
Sex is a biological variable that contributes to individual variability in brain structure and behavior. Neuroimaging studies of population-based samples have identified normative differences in brain structure between males and females, many of which are exacerbated in psychiatric and neurological conditions. Still, sex differences in MRI outcomes are understudied, particularly in clinical samples with known sex differences in disease risk, prevalence, and expression of clinical symptoms. Here we review the existing literature on sex differences in adult brain structure in normative samples and in 14 distinct psychiatric and neurological disorders. We discuss commonalities and sources of variance in study designs, analysis procedures, disease subtype effects, and the impact of these factors on MRI interpretation. Lastly, we identify key problems in the neuroimaging literature on sex differences and offer potential recommendations to address current barriers and optimize rigor and reproducibility. In particular, we emphasize the importance of large-scale neuroimaging initiatives such as the Enhancing NeuroImaging Genetics through Meta-Analyses consortium, the UK Biobank, Human Connectome Project, and others to provide unprecedented power to evaluate sex-specific phenotypes in major brain diseases.
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Affiliation(s)
- Lauren E. Salminen
- Imaging Genetics CenterMark and Mary Stevens Neuroimaging and Informatics Institute, Keck School of Medicine of USCMarina del ReyCaliforniaUSA
| | - Meral A. Tubi
- Imaging Genetics CenterMark and Mary Stevens Neuroimaging and Informatics Institute, Keck School of Medicine of USCMarina del ReyCaliforniaUSA
| | - Joanna Bright
- Imaging Genetics CenterMark and Mary Stevens Neuroimaging and Informatics Institute, Keck School of Medicine of USCMarina del ReyCaliforniaUSA
| | - Sophia I. Thomopoulos
- Imaging Genetics CenterMark and Mary Stevens Neuroimaging and Informatics Institute, Keck School of Medicine of USCMarina del ReyCaliforniaUSA
| | - Alyssa Wieand
- Imaging Genetics CenterMark and Mary Stevens Neuroimaging and Informatics Institute, Keck School of Medicine of USCMarina del ReyCaliforniaUSA
| | - Paul M. Thompson
- Imaging Genetics CenterMark and Mary Stevens Neuroimaging and Informatics Institute, Keck School of Medicine of USCMarina del ReyCaliforniaUSA
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Riello M, Frangakis CE, Ficek B, Webster KT, Desmond JE, Faria AV, Hillis AE, Tsapkini K. Neural Correlates of Letter and Semantic Fluency in Primary Progressive Aphasia. Brain Sci 2021; 12:1. [PMID: 35053745 PMCID: PMC8773895 DOI: 10.3390/brainsci12010001] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2021] [Revised: 12/15/2021] [Accepted: 12/16/2021] [Indexed: 11/21/2022] Open
Abstract
Verbal fluency (VF) is an informative cognitive task. Lesion and functional imaging studies implicate distinct cerebral areas that support letter versus semantic fluency and the understanding of neural and cognitive mechanisms underlying task performance. Most lesion studies include chronic stroke patients. People with primary progressive aphasia (PPA) provide complementary evidence for lesion-deficit associations, as different brain areas are affected in stroke versus PPA. In the present study we sought to determine imaging, clinical and demographic correlates of VF in PPA. Thirty-five patients with PPA underwent an assessment with letter and category VF tasks, evaluation of clinical features and an MRI scan for volumetric analysis. We used stepwise regression models to determine which brain areas are associated with VF performance while acknowledging the independent contribution of clinical and demographic factors. Letter fluency was predominantly associated with language severity (R2 = 38%), and correlated with the volume of the left superior temporal regions (R2 = 12%) and the right dorsolateral prefrontal area (R2 = 5%). Semantic fluency was predominantly associated with dementia severity (R2 = 47%) and correlated with the volume of the left inferior temporal gyrus (R2 = 7%). No other variables were significantly associated with performance in the two VF tasks. We concluded that, independently of disease severity, letter fluency is significantly associated with the volume of frontal and temporal areas whereas semantic fluency is associated mainly with the volume of temporal areas. Furthermore, our findings indicated that clinical severity plays a critical role in explaining VF performance in PPA, compared to the other clinical and demographic factors.
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Affiliation(s)
- Marianna Riello
- Department of Neurology, Johns Hopkins School of Medicine, Baltimore, MD 21205, USA; (M.R.); (B.F.); (K.T.W.); (J.E.D.); (A.E.H.)
| | - Constantine E. Frangakis
- Department of Biostatistics, Johns Hopkins School of Public Health, Baltimore, MD 21227, USA;
- Department of Radiology, Johns Hopkins School of Medicine, Baltimore, MD 21227, USA;
- Department of Psychiatry and Behavioral Sciences, Johns Hopkins School of Medicine, Baltimore, MD 21227, USA
| | - Bronte Ficek
- Department of Neurology, Johns Hopkins School of Medicine, Baltimore, MD 21205, USA; (M.R.); (B.F.); (K.T.W.); (J.E.D.); (A.E.H.)
| | - Kimberly T. Webster
- Department of Neurology, Johns Hopkins School of Medicine, Baltimore, MD 21205, USA; (M.R.); (B.F.); (K.T.W.); (J.E.D.); (A.E.H.)
- Department of Otolaryngology, Head and Neck Surgery, Johns Hopkins School of Medicine, Baltimore, MD 21227, USA
| | - John E. Desmond
- Department of Neurology, Johns Hopkins School of Medicine, Baltimore, MD 21205, USA; (M.R.); (B.F.); (K.T.W.); (J.E.D.); (A.E.H.)
| | - Andreia V. Faria
- Department of Radiology, Johns Hopkins School of Medicine, Baltimore, MD 21227, USA;
| | - Argye E. Hillis
- Department of Neurology, Johns Hopkins School of Medicine, Baltimore, MD 21205, USA; (M.R.); (B.F.); (K.T.W.); (J.E.D.); (A.E.H.)
- Department of Cognitive Science, Johns Hopkins University, Baltimore, MD 21218, USA
- Department of Physical Medicine and Rehabilitation, Johns Hopkins School of Medicine, Baltimore, MD 21205, USA
| | - Kyrana Tsapkini
- Department of Neurology, Johns Hopkins School of Medicine, Baltimore, MD 21205, USA; (M.R.); (B.F.); (K.T.W.); (J.E.D.); (A.E.H.)
- Department of Cognitive Science, Johns Hopkins University, Baltimore, MD 21218, USA
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Roncero C, Nikelski J, Probst S, Fernandez A, Thiel A, Chertkow H. The semantic storage loss score: An Algorithm for measuring an individual's level of semantic storage loss due to temporal lobe damage in neurodegenerative disease. PLoS One 2020; 15:e0235810. [PMID: 32810171 PMCID: PMC7433857 DOI: 10.1371/journal.pone.0235810] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2019] [Accepted: 06/24/2020] [Indexed: 11/18/2022] Open
Abstract
Anomia is common in Primary Progressive Aphasia (PPA), and there is considerable evidence that semantic problems (as opposed to impaired access to output word phonology) exist in many PPA individuals irrespective of their strict subtype, including a loss of representations from semantic memory, which is typical for people with the semantic variant of PPA. In this manuscript we present a straightforward novel clinical algorithm that quantifies this degree of semantic storage impairment. We sought to produce an algorithm by employing tasks that would measure key elements of semantic storage loss: a) whether an unrecalled name could be retrieved with cues; b) if performance for items was consistent across tasks; and c) the degree to which a participant’s performance was related to general severity of cognitive impairment rather than semantic loss. More specifically, these tasks were given to 28 individuals with PPA (12 participants had a clinical diagnosis of atypical Alzheimer’s Disease with the logopenic variant of PPA; the remaining 16 participants received a clinical diagnosis of Frontotemporal dementia (11 were classified as the non-fluent variant of PPA and five were the semantic variant of PPA). Scores from these tasks produced a single omnibus semantic memory storage loss score (SSL score) for each person that ranged from 0.0 to 1.0, with scores closer to 0 more indicative of semantic storage loss. Indeed, supporting the hypothesis that our scores measure the degree of semantic storage loss, we found participants with the semantic variant of PPA had the lowest scores, and SSL scores could predict the degree of hypometabolism in the anterior temporal lobe; even when only people with the logopenic variant of PPA were examined. Thus, these scores show promise quantitating the degree of a person’s semantic representation loss.
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Affiliation(s)
- Carlos Roncero
- Lady Davis Institute for Medical Research, Jewish General Hospital, McGill University, Montréal, Québec, Canada
- Baycrest Health Sciences, Rotman Research Institute, Toronto, Ontario, Canada
- * E-mail: (CR); (HC)
| | - Jim Nikelski
- Lady Davis Institute for Medical Research, Jewish General Hospital, McGill University, Montréal, Québec, Canada
| | - Stephan Probst
- Nuclear Medicine, Jewish General Hospital, McGill University, Montréal, Québec, Canada
| | - Alita Fernandez
- Baycrest Health Sciences, Rotman Research Institute, Toronto, Ontario, Canada
| | - Alex Thiel
- Lady Davis Institute for Medical Research, Jewish General Hospital, McGill University, Montréal, Québec, Canada
| | - Howard Chertkow
- Lady Davis Institute for Medical Research, Jewish General Hospital, McGill University, Montréal, Québec, Canada
- Baycrest Health Sciences, Rotman Research Institute, Toronto, Ontario, Canada
- * E-mail: (CR); (HC)
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Riello M, Faria AV, Ficek B, Webster K, Onyike CU, Desmond J, Frangakis C, Tsapkini K. The Role of Language Severity and Education in Explaining Performance on Object and Action Naming in Primary Progressive Aphasia. Front Aging Neurosci 2018; 10:346. [PMID: 30425638 PMCID: PMC6218435 DOI: 10.3389/fnagi.2018.00346] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2018] [Accepted: 10/11/2018] [Indexed: 01/10/2023] Open
Abstract
Despite the common assumption that atrophy in a certain brain area would compromise the function that it subserves, this is not always the case, especially in complex clinical syndromes such as primary progressive aphasia (PPA). Clinical and demographic information may contribute to PPA phenotypes and explain the manifested impairments better than atrophy. In the present study, we asked how much variance of the object and action naming impairments observed in PPA may be attributed to atrophy in the language network alone vs. additional clinical and demographic factors including language severity and education. Thirty-nine participants with PPA underwent magnetic resonance imaging (MRI) for volumetric analysis and a complete neuropsychological examination, including standardized tests of object and action naming. We used stepwise regression models to compare atrophy (volumetric model) to clinical/demographic variables (clinical-demographic model) for naming objects and actions. The clinical-demographic model was the best-fit model that explained the largest amount of variance in both object and action naming. Brain volume measurements alone explained little variance in both object and action naming. Clinical factors, particularly language severity, and demographic factors, particularly education, need to be considered in conjunction with brain volumes in PPA. The present study emphasizes the complexity of PPA as a syndrome and provides an example of how volumetric, clinical and demographic factors may interact in determining naming performance/deterioration.
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Affiliation(s)
- Marianna Riello
- Department of Neurology, Johns Hopkins University School of Medicine, Baltimore, MD, United States
| | - Andreia V Faria
- Department of Radiology and Radiological Science, Johns Hopkins University School of Medicine, Baltimore, MD, United States
| | - Bronte Ficek
- Department of Neurology, Johns Hopkins University School of Medicine, Baltimore, MD, United States
| | - Kimberly Webster
- Department of Neurology, Johns Hopkins University School of Medicine, Baltimore, MD, United States.,Department of Otolaryngology, Head & Neck Surgery, Johns Hopkins University School of Medicine, Baltimore, MD, United States
| | - Chiadi U Onyike
- Department of Psychiatry and Behavioral Sciences, Johns Hopkins University School of Medicine, Baltimore, MD, United States
| | - John Desmond
- Department of Neurology, Johns Hopkins University School of Medicine, Baltimore, MD, United States
| | - Constantine Frangakis
- Department of Radiology and Radiological Science, Johns Hopkins University School of Medicine, Baltimore, MD, United States.,Department of Psychiatry and Behavioral Sciences, Johns Hopkins University School of Medicine, Baltimore, MD, United States.,Department of Biostatistics, Johns Hopkins School of Public Health, Baltimore, MD, United States
| | - Kyrana Tsapkini
- Department of Neurology, Johns Hopkins University School of Medicine, Baltimore, MD, United States.,Department of Cognitive Science, Johns Hopkins University, Baltimore, MD, United States
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Erdodi L, Roth R. Low scores on BDAE Complex Ideational Material are associated with invalid performance in adults without aphasia. APPLIED NEUROPSYCHOLOGY-ADULT 2016; 24:264-274. [DOI: 10.1080/23279095.2016.1154856] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Affiliation(s)
- Laszlo Erdodi
- Department of Psychology, University of Windsor, Ontario, Canada
| | - Robert Roth
- Department of Psychiatry, Geisel School of Medicine at Dartmouth, Lebanon, New Hampshire, USA
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Paternicó D, Premi E, Alberici A, Archetti S, Bonomi E, Gualeni V, Gasparotti R, Padovani A, Borroni B. Dyslexia susceptibility genes influence brain atrophy in frontotemporal dementia. NEUROLOGY-GENETICS 2015; 1:e24. [PMID: 27066561 PMCID: PMC4809460 DOI: 10.1212/nxg.0000000000000024] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/13/2015] [Accepted: 08/15/2015] [Indexed: 01/10/2023]
Abstract
Objective: In this study, we evaluated whether variations within genes specifically associated with dyslexia, namely KIAA0319, DCDC2, and CNTNAP2, were associated with greater damage of language-related regions in patients with frontotemporal dementia (FTD) and primary progressive aphasia (PPA) in particular. Methods: A total of 118 patients with FTD, 84 with the behavioral variant of FTD (bvFTD) and 34 with PPA, underwent neuropsychological examination, genetic analyses, and brain MRI. KIAA0319 rs17243157 G/A, DCDC2 rs793842 A/G, and CNTNAP2 rs17236239 A/G genetic variations were assessed. Patients were grouped according to clinical phenotype and genotype status (GA/AA or GG). Gray matter (GM) and white matter (WM) differences were assessed by voxel-based morphometry and structural intercorrelation pattern analyses. Results: Patients carrying KIAA0319 A* (GA or AA) showed greater GM and WM atrophy in the left middle and inferior temporal gyri, as compared with KIAA0319 GG (p < 0.001). The effect of KIAA0319 polymorphism was mainly reported in patients with PPA. In patients with PPA carrying at-risk polymorphism, temporal damage led to loss of interhemispheric and intrahemispheric GM and WM structural association. No effect of DCDC2 and CNTNAP2 was found. Conclusions: Genes involved in dyslexia susceptibility, such as KIAA0319, result in language network vulnerability in FTD, and in PPA in particular.
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Affiliation(s)
- Donata Paternicó
- Departments of Biomedical Sciences and Translational Medicine (D.P.) and Clinical and Experimental Sciences (E.P., E.B., A.A., V.G., A.P., B.B.), Centre of Brain Aging, Neurology Unit, University of Brescia; the III Laboratory (S.A.), Biotechnology, Spedali Civili Hospital, Brescia; and the Neuroradiology Unit (R.G.), University of Brescia, Italy
| | - Enrico Premi
- Departments of Biomedical Sciences and Translational Medicine (D.P.) and Clinical and Experimental Sciences (E.P., E.B., A.A., V.G., A.P., B.B.), Centre of Brain Aging, Neurology Unit, University of Brescia; the III Laboratory (S.A.), Biotechnology, Spedali Civili Hospital, Brescia; and the Neuroradiology Unit (R.G.), University of Brescia, Italy
| | - Antonella Alberici
- Departments of Biomedical Sciences and Translational Medicine (D.P.) and Clinical and Experimental Sciences (E.P., E.B., A.A., V.G., A.P., B.B.), Centre of Brain Aging, Neurology Unit, University of Brescia; the III Laboratory (S.A.), Biotechnology, Spedali Civili Hospital, Brescia; and the Neuroradiology Unit (R.G.), University of Brescia, Italy
| | - Silvana Archetti
- Departments of Biomedical Sciences and Translational Medicine (D.P.) and Clinical and Experimental Sciences (E.P., E.B., A.A., V.G., A.P., B.B.), Centre of Brain Aging, Neurology Unit, University of Brescia; the III Laboratory (S.A.), Biotechnology, Spedali Civili Hospital, Brescia; and the Neuroradiology Unit (R.G.), University of Brescia, Italy
| | - Elisa Bonomi
- Departments of Biomedical Sciences and Translational Medicine (D.P.) and Clinical and Experimental Sciences (E.P., E.B., A.A., V.G., A.P., B.B.), Centre of Brain Aging, Neurology Unit, University of Brescia; the III Laboratory (S.A.), Biotechnology, Spedali Civili Hospital, Brescia; and the Neuroradiology Unit (R.G.), University of Brescia, Italy
| | - Vera Gualeni
- Departments of Biomedical Sciences and Translational Medicine (D.P.) and Clinical and Experimental Sciences (E.P., E.B., A.A., V.G., A.P., B.B.), Centre of Brain Aging, Neurology Unit, University of Brescia; the III Laboratory (S.A.), Biotechnology, Spedali Civili Hospital, Brescia; and the Neuroradiology Unit (R.G.), University of Brescia, Italy
| | - Roberto Gasparotti
- Departments of Biomedical Sciences and Translational Medicine (D.P.) and Clinical and Experimental Sciences (E.P., E.B., A.A., V.G., A.P., B.B.), Centre of Brain Aging, Neurology Unit, University of Brescia; the III Laboratory (S.A.), Biotechnology, Spedali Civili Hospital, Brescia; and the Neuroradiology Unit (R.G.), University of Brescia, Italy
| | - Alessandro Padovani
- Departments of Biomedical Sciences and Translational Medicine (D.P.) and Clinical and Experimental Sciences (E.P., E.B., A.A., V.G., A.P., B.B.), Centre of Brain Aging, Neurology Unit, University of Brescia; the III Laboratory (S.A.), Biotechnology, Spedali Civili Hospital, Brescia; and the Neuroradiology Unit (R.G.), University of Brescia, Italy
| | - Barbara Borroni
- Departments of Biomedical Sciences and Translational Medicine (D.P.) and Clinical and Experimental Sciences (E.P., E.B., A.A., V.G., A.P., B.B.), Centre of Brain Aging, Neurology Unit, University of Brescia; the III Laboratory (S.A.), Biotechnology, Spedali Civili Hospital, Brescia; and the Neuroradiology Unit (R.G.), University of Brescia, Italy
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Van Ettinger-Veenstra H, Ragnehed M, McAllister A, Lundberg P, Engström M. Right-hemispheric cortical contributions to language ability in healthy adults. BRAIN AND LANGUAGE 2012; 120:395-400. [PMID: 22115846 DOI: 10.1016/j.bandl.2011.10.002] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/24/2011] [Revised: 08/16/2011] [Accepted: 10/02/2011] [Indexed: 05/31/2023]
Abstract
In this study we investigated the correlation between individual linguistic ability based on performance levels and their engagement of typical and atypical language areas in the brain. Eighteen healthy subjects between 21 and 64 years participated in language ability tests, and subsequent functional MRI scans measuring brain activity in response to a sentence completion and a word fluency task. Performance in both reading and high-level language tests correlated positively with increased right-hemispheric activation in the inferior frontal gyrus (specifically Brodmann area 47), the dorsolateral prefrontal cortex (DLPFC), and the medial temporal gyrus (Brodmann area 21). In contrast, we found a negative correlation between performance and left-hemispheric DLPFC activation. Our findings indicate that the right lateral frontal and right temporal regions positively modulate aspects of language ability.
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R. Hall J, T. Vo H, A. Johnson L, Wiechmann A, E. O’Bryant S. Boston Naming Test: Gender Differences in Older Adults with and without Alzheimer’s Dementia. ACTA ACUST UNITED AC 2012. [DOI: 10.4236/psych.2012.36068] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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The human inferior parietal lobule in stereotaxic space. Brain Struct Funct 2008; 212:481-95. [DOI: 10.1007/s00429-008-0195-z] [Citation(s) in RCA: 272] [Impact Index Per Article: 17.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2008] [Accepted: 07/11/2008] [Indexed: 10/21/2022]
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Rate of Cognitive Change Measured by Neuropsychologic Test Performance in 3 Distinct Dementia Syndromes. Alzheimer Dis Assoc Disord 2007; 21:S70-8. [DOI: 10.1097/wad.0b013e31815bf8a5] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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