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Huang YT, Yan SH, Chuang YF, Shih YC, Huang YS, Liu YC, Kao SSC, Chiu YL, Fan YT. A mediation approach in resting-state connectivity between the medial prefrontal cortex and anterior cingulate in mild cognitive impairment. Aging Clin Exp Res 2024; 36:154. [PMID: 39078432 PMCID: PMC11289021 DOI: 10.1007/s40520-024-02805-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2024] [Accepted: 07/01/2024] [Indexed: 07/31/2024]
Abstract
Mild cognitive impairment (MCI) is recognized as the prodromal phase of dementia, a condition that can be either maintained or reversed through timely medical interventions to prevent cognitive decline. Considerable studies using functional magnetic resonance imaging (fMRI) have indicated that altered activity in the medial prefrontal cortex (mPFC) serves as an indicator of various cognitive stages of aging. However, the impacts of intrinsic functional connectivity in the mPFC as a mediator on cognitive performance in individuals with and without MCI have not been fully understood. In this study, we recruited 42 MCI patients and 57 healthy controls, assessing their cognitive abilities and functional brain connectivity patterns through neuropsychological evaluations and resting-state fMRI, respectively. The MCI patients exhibited poorer performance on multiple neuropsychological tests compared to the healthy controls. At the neural level, functional connectivity between the mPFC and the anterior cingulate cortex (ACC) was significantly weaker in the MCI group and correlated with multiple neuropsychological test scores. The result of the mediation analysis further demonstrated that functional connectivity between the mPFC and ACC notably mediated the relationship between the MCI and semantic fluency performance. These findings suggest that altered mPFC-ACC connectivity may have a plausible causal influence on cognitive decline and provide implications for early identifications of neurodegenerative diseases and precise monitoring of disease progression.
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Affiliation(s)
- Yiyuan Teresa Huang
- International Research Center for Neurointelligence (WPI-IRCN), UTIAS, The University of Tokyo, Tokyo, Japan
| | - Sui-Hing Yan
- Department of Neurology, Far Eastern Memorial Hospital, New Taipei City, Taiwan
| | - Yi-Fang Chuang
- Department of Psychiatry, Far Eastern Memorial Hospital, New Taipei City, Taiwan
- Institute of Public Health, College of Medicine, National Yang Ming Chiao Tung University, Taipei City, Taiwan
- International Health Program, College of Medicine, National Yang Ming Chiao Tung University, Taipei City, Taiwan
| | - Yao-Chia Shih
- Graduate Institute of Medicine, Yuan Ze University, Building 3 R3705, 135 Yuan-Tung Road, Zhongli District, Taoyuan City, 32003, Taiwan
| | - Yan-Siang Huang
- Department of Neurology, Far Eastern Memorial Hospital, New Taipei City, Taiwan
| | - Yi-Chien Liu
- Department of Neurology, Cardinal Tien Hospital, New Taipei City, Taiwan
| | - Scott Shyh-Chang Kao
- Graduate Institute of Medicine, Yuan Ze University, Building 3 R3705, 135 Yuan-Tung Road, Zhongli District, Taoyuan City, 32003, Taiwan
- Institute of Neuroscience, National Yang Ming Chiao Tung University, Taipei City, Taiwan
| | - Yen-Ling Chiu
- Graduate Institute of Medicine, Yuan Ze University, Building 3 R3705, 135 Yuan-Tung Road, Zhongli District, Taoyuan City, 32003, Taiwan
- Department of Medical Research, Far Eastern Memorial Hospital, New Taipei City, Taiwan
| | - Yang-Teng Fan
- Graduate Institute of Medicine, Yuan Ze University, Building 3 R3705, 135 Yuan-Tung Road, Zhongli District, Taoyuan City, 32003, Taiwan.
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Boots A, Schrantee A, Wiegersma AM, Aflalo S, Groot PFC, Roseboom TJ, de Rooij SR. Brain activity during Stroop task performance at age 74 after exposure to the Dutch famine during early gestation. Brain Cogn 2024; 177:106162. [PMID: 38703528 DOI: 10.1016/j.bandc.2024.106162] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2023] [Revised: 04/10/2024] [Accepted: 04/16/2024] [Indexed: 05/06/2024]
Abstract
OBJECTIVE Poorer performance on the Stroop task has been reported after prenatal famine exposure at age 58, potentially indicating cognitive decline. We investigated whether brain activation during Stroop task performance at age 74 differed between individuals exposed to famine prenatally, individuals born before and individuals conceived after the famine. METHOD In the Dutch famine birth cohort, we performed a Stroop task fMRI study of individuals exposed (n = 22) or unexposed (born before (n = 18) or conceived after (n = 25)) to famine in early gestation. We studied group differences in task-related mean activation of the dorsolateral prefrontal cortex (DLPFC), anterior cingulate cortex (ACC) and posterior parietal cortex (PPC). Additionally, we explored potential disconnectivity of the DLPFC using psychophysiological interaction analysis. RESULTS We observed similar activation patterns in the DLPFC, ACC and PPC in individuals born before and individuals exposed to famine, while individuals conceived after famine had generally higher activation patterns. However, activation patterns were not significantly different between groups. Task-related decreases in connectivity were observed between left DLPFC-left PPC and right DLPFC-right PPC, but were not significantly different between groups. CONCLUSIONS Although not statistically significant, the observed patterns of activation may reflect a combined effect of general brain aging and prenatal famine exposure.
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Affiliation(s)
- A Boots
- Amsterdam UMC Location University of Amsterdam, Department of Epidemiology and Data Science, Meibergdreef 9, Amsterdam, the Netherlands; Aging and Later Life, Amsterdam Public Health, Amsterdam, the Netherlands; Amsterdam Reproduction and Development, Amsterdam, the Netherlands.
| | - A Schrantee
- Amsterdam UMC Location University of Amsterdam, Department of Radiology and Nuclear Medicine, Meibergdreef 9, Amsterdam, the Netherlands.
| | - A M Wiegersma
- Amsterdam UMC Location University of Amsterdam, Department of Epidemiology and Data Science, Meibergdreef 9, Amsterdam, the Netherlands; Aging and Later Life, Amsterdam Public Health, Amsterdam, the Netherlands; Amsterdam Reproduction and Development, Amsterdam, the Netherlands.
| | - S Aflalo
- Amsterdam UMC Location University of Amsterdam, Department of Epidemiology and Data Science, Meibergdreef 9, Amsterdam, the Netherlands.
| | - P F C Groot
- Amsterdam UMC Location University of Amsterdam, Department of Radiology and Nuclear Medicine, Meibergdreef 9, Amsterdam, the Netherlands.
| | - T J Roseboom
- Amsterdam UMC Location University of Amsterdam, Department of Epidemiology and Data Science, Meibergdreef 9, Amsterdam, the Netherlands; Aging and Later Life, Amsterdam Public Health, Amsterdam, the Netherlands; Amsterdam Reproduction and Development, Amsterdam, the Netherlands; Amsterdam UMC Location University of Amsterdam, Department of Obstetrics and Gynecology, Meibergdreef 9, Amsterdam, the Netherlands.
| | - S R de Rooij
- Amsterdam UMC Location University of Amsterdam, Department of Epidemiology and Data Science, Meibergdreef 9, Amsterdam, the Netherlands; Aging and Later Life, Amsterdam Public Health, Amsterdam, the Netherlands; Amsterdam Reproduction and Development, Amsterdam, the Netherlands.
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Idowu MI, Szameitat AJ, Parton A. The assessment of executive function abilities in healthy and neurodegenerative aging-A selective literature review. Front Aging Neurosci 2024; 16:1334309. [PMID: 38596597 PMCID: PMC11002121 DOI: 10.3389/fnagi.2024.1334309] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2023] [Accepted: 02/26/2024] [Indexed: 04/11/2024] Open
Abstract
Numerous studies have examined executive function (EF) abilities in cognitively healthy older adults and those living with mild cognitive impairment (MCI) and Alzheimer's disease (AD). Currently, there are no standard accepted protocols for testing specific EFs; thus, researchers have used their preferred tool, which leads to variability in assessments of decline in a particular ability across studies. Therefore, there is a need for guidance as to the most sensitive tests for assessing EF decline. A search of the most current literature published between 2000 and 2022 on EF studies assessing cognitively healthy older adults and individuals living with MCI and AD was conducted using PubMed/Medline, PsycINFO, Embase, Web of Science, and Google Scholar. Emphasis was placed on the EF's dual-tasking, inhibition, shifting or switching, and working memory updating. Many tasks and their outcomes were reviewed. Of particular importance was the difference in outcomes for tasks applied to the same group of participants. These various EF assessment tools demonstrate differences in effectively identifying decline in EF ability due to the aging process and neurodegenerative conditions, such as MCI and AD. This review identifies various factors to consider in using particular EF tasks in particular populations, including task demand and stimuli factors, and also when comparing differing results across studies.
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Affiliation(s)
- Mojitola I. Idowu
- Centre for Cognitive and Clinical Neuroscience (CCN), College of Health, Medicine and Life Sciences, Division of Psychology, Department of Life Sciences, Brunel University London, Uxbridge, United Kingdom
| | | | - Andrew Parton
- Centre for Cognitive and Clinical Neuroscience (CCN), College of Health, Medicine and Life Sciences, Division of Psychology, Department of Life Sciences, Brunel University London, Uxbridge, United Kingdom
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Dobrynina LA, Gadzhieva ZS, Dobrushina OR, Morozova SN, Kremneva EI, Volik AV, Krotenkova MV. [Identifying the neurostimulation target for treatment of cognitive impairment in aging and early cerebral small vessel disease]. Zh Nevrol Psikhiatr Im S S Korsakova 2024; 124:34-41. [PMID: 38529861 DOI: 10.17116/jnevro202412403134] [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: 03/27/2024]
Abstract
OBJECTIVE To develop individualized approaches to the use of neuromodulation as a non-pharmacological treatment of cognitive impairment (CI) based on the assessment of compensatory brain reserves in functional MRI (fMRI). MATERIAL AND METHODS Twenty-one adults over 45 years of age, representing a continuum from healthy norm to mild cognitive impairment due to aging and early cerebral small vessel disease, were studied. All participants underwent fMRI while performing two executive tasks - a modified Stroop task and selective counting. To assess the ability to compensate for CI in real life, functional activation and connectivity were analyzed using the BRIEF-MoCA score as a covariate, which is the difference in ratings between the Behavior Rating Inventory of Executive Function (BRIEF) and the Montreal Cognitive Assessment Scale (MoCA). RESULTS Both fMRI tasks were associated with activation of areas of the frontoparietal control network, as well as supplementary motor area (SMA) and the pre-SMA, the lateral premotor cortex, and the cerebellum. An increase in pre- SMA connectivity was observed during the tasks. The BRIEF-MoCA score correlated firstly with connectivity of the left dorsolateral prefrontal cortex (DLPFC) and secondly with involvement of the occipital cortex during the counting task. CONCLUSIONS The developed technique allows identification of the functionally relevant target within the left DLPFC in patients with CI in aging and early cerebral microangiopathy.
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Affiliation(s)
| | | | | | | | | | - A V Volik
- Research Center of Neurology, Moscow, Russia
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Freitas PM, Haase VG, Wood GM. The neural correlates of interference effects of numerical Stroop task: An ALE meta-analysis and connectometry. PROGRESS IN BRAIN RESEARCH 2023; 282:71-93. [PMID: 38035910 DOI: 10.1016/bs.pbr.2023.10.003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/02/2023]
Abstract
Numerical skills are part of cognitive and formal education development, and low performance in math has been associated with adverse features such as low income and unemployment. The studies of functional magnetic resonance imaging (fMRI) activation in numerical Stroop interference had been accomplished to evidence neural correlates of numerical, automatic, and controlled processes. The aim of this research was to summarize the results of the neural correlates of a number-size congruity task through meta-analysis of fMRI, behavioral evidence, and connectometry. Our study includes 15 fMRI papers (total number of subjects n=155-302, the total number of foci=81-233). Meta-analyses used an activation likelihood estimation (ALE) logarithm. For connectometry, it was used the diffusion tensor image. We found that, for the attentional control numerical Stroop effect, the activated areas were the dorsolateral prefrontal cortex, the anterior cingulate gyrus, and the intraparietal sulcus. Consistent activation over both paradigms was found in five clusters, two in the frontal and three in the parietal lobe. The matrix of connectivity showed connections between insula and inferior parietal right with 587 fibers, cingulate gyrus, and inferior parietal right with 843 fibers. Both paradigms activate parietal areas but differ in the activation of regions correlated to attentional control. The results of these meta-analyses summarized results from fMRI studies that may contribute to current theories. The results of connectometry could be interpreted regarding the fibers connection between the clusters right inferior parietal with insula and cingulate gyrus that suggests the integration of information.
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Affiliation(s)
- Patricia Martins Freitas
- Graduate Program in Health Psychology, Federal University of Bahia, Vitória da Conquista, Brazil; Graduate Program of Teaching, State University of Southwest Bahia, Vitória da Conquista, Brazil.
| | - Vitor Geraldi Haase
- Graduate Program in Psychology: Cognition and Behavior, Federal University of Minas Gerais, Belo Horizonte, Brazil
| | - Guilherme Maia Wood
- Institute of Psychology, University of Graz, Graz, Austria; BioTechMed-Graz, Graz, Austria
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Pekár J, Hofmann W, Knakker B, Tamm S, Kinder A. Electrophysiological Correlates of the Interaction of Physical and Numerical Size in Symbolic Number Processing: Insights from a Novel Go/Nogo Numerical Stroop Task. Brain Sci 2023; 13:brainsci13050702. [PMID: 37239174 DOI: 10.3390/brainsci13050702] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2023] [Revised: 04/20/2023] [Accepted: 04/21/2023] [Indexed: 05/28/2023] Open
Abstract
The interaction of physical and numerical size has been investigated and repeatedly demonstrated in the numerical Stroop task, in which participants compare digits of different physical sizes. It is, however, not entirely clear yet what psychological processes contribute to this interaction. The aim of the present study is to investigate the role of inhibition in the interaction of physical and numerical size, by introducing a novel paradigm that is suitable to elicit inhibition-related event-related potential components. To this end, we combined the go/nogo paradigm with the numerical Stroop task while measuring EEG and reaction times. Participants were presented with Arabic number pairs and had to press a button if the number on one side was numerically larger and they had to refrain from responding if the number on the other side was numerically larger. The physical size of the number pairs was also manipulated, in order to create congruent, neutral, and incongruent trials. Behavioural results confirmed the well-established numerical distance and numerical Stroop effects. Analysis of electrophysiological data revealed the classical go/nogo electrophysiological effects with numerical stimuli, and showed that peak amplitudes were larger for nogo than for go trials on the N2, as well as on the P3 component, on frontal and midline electrodes. When analysing the congruency effects, the peak amplitude of N2 was larger in incongruent trials than in neutral and congruent trials, while there was no evidence of a congruency effect on the P3 component peaks. Further analysis of the electrophysiological data revealed an additional facilitatory effect in the go trials, as well as an additional interference effect in the nogo trials. Taken together, it seems that interference effects are probably resolved by inhibitory processes and that facilitatory effects are affected by different cognitive control processes required by go versus nogo trials.
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Affiliation(s)
- Judit Pekár
- Institute of Psychology of Learning, Department of Education and Psychology, Freie Universität Berlin, 14195 Berlin, Germany
| | - Wiebke Hofmann
- Institute of Psychology of Learning, Department of Education and Psychology, Freie Universität Berlin, 14195 Berlin, Germany
| | - Balázs Knakker
- Grastyán Translational Research Center, University of Pécs, 7624 Pécs, Hungary
| | - Sascha Tamm
- Institute of Experimental and Cognitive Neuropsychology, Department of Education and Psychology, Freie Universität Berlin, 14195 Berlin, Germany
| | - Annette Kinder
- Institute of Psychology of Learning, Department of Education and Psychology, Freie Universität Berlin, 14195 Berlin, Germany
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7
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Veerapandian KD, Tan GXD, Majeed NM, Hartanto A. Executive Function Deficits and Borderline Personality Disorder Symptomatology in a Nonclinical Adult Sample: A Latent Variable Analysis. Brain Sci 2023; 13:brainsci13020206. [PMID: 36831751 PMCID: PMC9953861 DOI: 10.3390/brainsci13020206] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2022] [Revised: 01/18/2023] [Accepted: 01/19/2023] [Indexed: 01/28/2023] Open
Abstract
While borderline personality disorder (BPD) symptomatology has been studied extensively in clinical populations, the mechanisms underlying its manifestation in nonclinical populations remain largely understudied. One aspect of BPD symptomatology in nonclinical populations that has not been well studied is cognitive mechanisms, especially in relation to executive functions. To explore the cognitive mechanisms underlying BPD symptomatology in nonclinical populations, we analysed a large-scale dataset of 233 young adults that were administered with nine executive function tasks and BPD symptomatology assessments. Our structural equation modelling did not find any significant relations between latent factors of executive functions and the severity of BPD symptomatology. Contrary to our hypothesis, our result suggests that deficits in executive functions were not a risk factor for BPD symptomatology in the nonclinical young adult sample.
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Affiliation(s)
| | - Gabriel X. D. Tan
- School of Social Sciences, Singapore Management University, Singapore 179873, Singapore
| | - Nadyanna M. Majeed
- Department of Psychology, Faculty of Arts & Social Sciences, National University of Singapore, Singapore 119077, Singapore
| | - Andree Hartanto
- School of Social Sciences, Singapore Management University, Singapore 179873, Singapore
- Correspondence:
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Qin Y, Zhang F, Zhang M, Zhu W. Effects of repetitive transcranial magnetic stimulation combined with cognitive training on resting-state brain activity in Alzheimer's disease. Neuroradiol J 2022; 35:566-572. [PMID: 35019804 PMCID: PMC9513913 DOI: 10.1177/19714009211067409] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
OBJECTIVES Repetitive transcranial magnetic stimulation (rTMS) is a promising tool to modulate brain plasticity, but the neural basis has been little addressed. The purpose was to investigate the effects of rTMS on resting-state brain activity in patients with Alzheimer's disease (AD). METHODS Seventeen patients with mild or moderate AD were enrolled and randomly divided into one of the two intervention groups: (1) real rTMS combined with cognitive training (real group, n = 9); (2) sham rTMS with cognitive training (sham group, n = 8). 10 Hz rTMS was used to stimulate the left dorsolateral prefrontal cortex and then the left lateral temporal lobe for 20 min each day for 4 weeks. Each patient underwent neuropsychological assessment and resting-state functional magnetic resonance imaging (rsfMRI) before and after treatment. The fractional amplitude of low frequency fluctuation (fALFF) of rsfMRI data in real group were: (1) compared to sham; (2) correlated with rTMS-induced cognitive alterations. RESULTS Significantly increased fALFF in right cerebellum/declive, left lingual/cuneus and left cingulate gyrus, as well as decreased fALFF in left middle frontal gyrus were found after 10 Hz rTMS, but not after sham stimulation. Using these suprathreshold regions, we found that rTMS increased functional connectivity between the right cerebellum/declive and left precentral/postcentral gyrus. The fALFF increase in left lingual/cuneus and right cerebellum/declive was associated with significant improvement in cognitive function. CONCLUSIONS rTMS combined with cognitive training induced increased low frequency fluctuation neural oscillations and functional connectivity in brain regions subserving cognition, suggesting a possible neuronal mechanism of the beneficial effects of rTMS.
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Affiliation(s)
- Yuanyuan Qin
- Department of Radiology, Tongji
Hospital, Tongji Medical College, Huazhong University of Science and
Technology, Hubei, Wuhan, China
| | - Fengxia Zhang
- Department of Rehabilitation, RenMin Hospital of Wuhan
University, Hubei, Wuhan, China
| | - Min Zhang
- Department of Neurology, Tongji
Hospital, Tongji Medical College, Huazhong University of Science and
Technology, Hubei, Wuhan, China
| | - Wenzhen Zhu
- Department of Radiology, Tongji
Hospital, Tongji Medical College, Huazhong University of Science and
Technology, Hubei, Wuhan, China
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Fedeli D, Del Maschio N, Del Mauro G, Defendenti F, Sulpizio S, Abutalebi J. Cingulate cortex morphology impacts on neurofunctional activity and behavioral performance in interference tasks. Sci Rep 2022; 12:13684. [PMID: 35953536 PMCID: PMC9372177 DOI: 10.1038/s41598-022-17557-6] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2022] [Accepted: 07/27/2022] [Indexed: 12/25/2022] Open
Abstract
Inhibitory control is the capacity to withhold or suppress a thought or action intentionally. The anterior Midcingulate Cortex (aMCC) participates in response inhibition, a proxy measure of inhibitory control. Recent research suggests that response inhibition is modulated by individual variability in the aMCC sulcal morphology. However, no study has investigated if this phenomenon is associated with neurofunctional differences during a task. In this study, 42 participants performed an Attention Network Task and a Numerical Stroop task in an MRI scanner. We investigated differences in brain activity and response inhibition efficiency between individuals with symmetric and asymmetric aMCC sulcal patterns. The results showed that aMCC morphological variability is partly associated with inhibitory control, and revealed greater activation in individuals with symmetric patterns during the Stroop task. Our findings provide novel insights into the functional correlates of the relationship between aMCC morphology and executive abilities.
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Affiliation(s)
- Davide Fedeli
- Neuroradiology Department, Fondazione IRCCS Istituto Neurologico Carlo Besta, Milan, Italy.,Centre for Neurolinguistics and Psycholinguistics (CNPL), Università Vita-Salute San Raffaele, Via Olgettina, 58, 20132, Milan, Italy
| | - Nicola Del Maschio
- Centre for Neurolinguistics and Psycholinguistics (CNPL), Università Vita-Salute San Raffaele, Via Olgettina, 58, 20132, Milan, Italy
| | - Gianpaolo Del Mauro
- Centre for Neurolinguistics and Psycholinguistics (CNPL), Università Vita-Salute San Raffaele, Via Olgettina, 58, 20132, Milan, Italy
| | - Federica Defendenti
- Centre for Neurolinguistics and Psycholinguistics (CNPL), Università Vita-Salute San Raffaele, Via Olgettina, 58, 20132, Milan, Italy
| | - Simone Sulpizio
- Department of Psychology, University of Milano-Bicocca, Milan, Italy.,Milan Center for Neuroscience (NeuroMi), University of Milano-Bicocca, Milan, Italy
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Huang W, Li X, Xie H, Qiao T, Zheng Y, Su L, Tang ZM, Dou Z. Different Cortex Activation and Functional Connectivity in Executive Function Between Young and Elder People During Stroop Test: An fNIRS Study. Front Aging Neurosci 2022; 14:864662. [PMID: 35992592 PMCID: PMC9382234 DOI: 10.3389/fnagi.2022.864662] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2022] [Accepted: 06/20/2022] [Indexed: 11/23/2022] Open
Abstract
Objective The objective of this study was to examine the activation and functional connectivity of the prefrontal and temporal lobe in young and elder people during the Stroop test using functional near-infrared spectroscopy (fNIRS). Methods A total of 33 healthy volunteers (20 young people, mean age: 23.7 ± 3.9 years; 13 elder people, mean age: 63.9 ± 4.0 years) participated in the study. All subjects were asked to finish the Stroop Color Word Test. The oxygenated hemoglobin concentration (Delta [HbO2]) signals and the deoxygenated hemoglobin (Delta [HbR]) signals were recorded from temporopolar area (TA), pars triangularis Broca's area (Broca), dorsolateral prefrontal cortex (DLPFC), and frontopolar area (FA) by fNIRS. The coherence between the left and right frontotemporal lobe delta [HbO2] oscillations in four frequency intervals (I, 0.6–2 Hz; II, 0.145–0.6 Hz; III, 0.052–0.145 Hz; and IV, 0.021–0.052 Hz) was analyzed using wavelet coherence analysis and wavelet phase coherent. Results In the Stroop test, the young group was significantly better than the elder group at the responses time, whether at congruent tasks or at incongruent tasks (congruent: F = 250.295, p < 0.001; incongruent: p < 0.001). The accuracy of the two groups differed significantly when performing incongruent tasks but not when performing congruent tasks (incongruent: F = 9.498, p = 0.001; congruent: p = 0.254). Besides, only elders show significant activation in DLPFC, Broca, FA, and TA (p < 0.05) during the Stroop test, but young people did not show significant differences. In the functional connectivity of task states, younger people had stronger connections between different brain regions in both the left and right brain compared with the elderly (p < 0.05). In particular, the left and right DLPFC showed stronger connection strength in most of the brain areas. The result suggested that younger people had stronger functional connectivity of brain areas than older people when completing the task. Conclusion According to these results, although the cortical activation in the elder people was higher than the young people, the young showed stronger connectivity in most of the brain areas than the elders. Both sides of DLPFC and right Broca area were the most significant cortical activation in Stroop test. It was suggested that the decrease in functional connectivity in the elder people resulted in the atrophy of white matter, to which we should pay more attention.
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Affiliation(s)
- Wenhao Huang
- Department of Rehabilitation Medicine, The Third Affiliated Hospital of Sun Yat- sen University, Guangzhou, China
| | - Xin Li
- Department of Rehabilitation Medicine, The Third Affiliated Hospital of Sun Yat- sen University, Guangzhou, China
| | - Hui Xie
- Key Laboratory for Biomechanics and Mechanobiology of Ministry of Education, School of Biological Science and Medical Engineering, Beihang University, Beijing, China
| | - Tong Qiao
- Affiliated Hospital of Inner Mongolia Medical University, Hohhot, China
| | - Yadan Zheng
- Department of Rehabilitation Medicine, The Third Affiliated Hospital of Sun Yat- sen University, Guangzhou, China
| | - Liujie Su
- Department of Rehabilitation Medicine, The Third Affiliated Hospital of Sun Yat- sen University, Guangzhou, China
| | - Zhi-Ming Tang
- Department of Rehabilitation Medicine, The Third Affiliated Hospital of Sun Yat- sen University, Guangzhou, China
- *Correspondence: Zhi-Ming Tang
| | - Zulin Dou
- Department of Rehabilitation Medicine, The Third Affiliated Hospital of Sun Yat- sen University, Guangzhou, China
- Zulin Dou
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11
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Scheerbaum P, Book S, Jank M, Hanslian E, DellO'ro M, Schneider J, Scheuermann JS, Bösl S, Jeitler M, Kessler C, Graessel E. Computerised cognitive training tools and online nutritional group counselling for people with mild cognitive impairment: study protocol of a completely digital, randomised, controlled trial. BMJ Open 2022; 12:e060473. [PMID: 35777882 PMCID: PMC9252202 DOI: 10.1136/bmjopen-2021-060473] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/22/2021] [Accepted: 06/08/2022] [Indexed: 11/12/2022] Open
Abstract
INTRODUCTION People with mild cognitive impairment (MCI) are at increased risk of decreasing cognitive functioning. Computerised cognitive training (CCT) and nutrition have been shown to improve the cognitive capacities of people with MCI. For each variable, we developed two kinds of interventions specialised for people with MCI (CCT: 'individualised' CCT; nutrition: a whole-food, plant-based diet). Additionally, there are two kinds of active control measures (CCT: 'basic' CCT; nutrition: a healthy diet following the current guidelines of the German Nutrition Society). The aim of this study is to investigate the effects of the two interventions on cognition in people with MCI in a 2×2 randomised controlled trial with German participants. METHODS AND ANALYSIS Participants will be community-dwelling individuals with a psychometric diagnosis of MCI based on the Montreal Cognitive Assessment (MoCA) and Mini-Mental State Examination. With N=200, effects with an effect size of f≥0.24 (comparable to Cohen's d≥0.48) can be detected. Screening, baseline, t6 and t12 testing will be conducted via a videoconferencing assessment, telephone, and online survey. Participants will be randomly allocated to one of four groups and will receive a combination of CCT and online nutritional counselling. The CCT can be carried out independently at home on a computer, laptop, or tablet. Nutrition counselling includes 12 online group sessions every fortnight for 1.5 hours. The treatment phase is 6 months with follow-ups after six and 12 months after baseline. ETHICS AND DISSEMINATION All procedures were approved by the Friedrich-Alexander-Universität Erlangen-Nürnberg Ethics Committee (Ref. 21-318-1-B). Written informed consent will be obtained from all participants. Results will be published in peer-reviewed scientific journals, conference presentations. TRIAL REGISTRATION NUMBER ISRCTN10560738.
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Affiliation(s)
- Petra Scheerbaum
- Centre of Health Services Research in Medicine, Department of Psychiatry and Psychotherapy, Universitätsklinikum Erlangen, Friedrich-Alexander-Universität Erlangen-Nürnberg, Erlangen, Germany
| | - Stephanie Book
- Centre of Health Services Research in Medicine, Department of Psychiatry and Psychotherapy, Universitätsklinikum Erlangen, Friedrich-Alexander-Universität Erlangen-Nürnberg, Erlangen, Germany
| | - Michael Jank
- Centre of Health Services Research in Medicine, Department of Psychiatry and Psychotherapy, Universitätsklinikum Erlangen, Friedrich-Alexander-Universität Erlangen-Nürnberg, Erlangen, Germany
- Genesis Mediware GmbH, Hersbruck, Germany
| | - Etienne Hanslian
- Institute of Social Medicine, Epidemiology and Health Economics, Charite University Hospital, Berlin, Germany
| | - Melanie DellO'ro
- Institute of Social Medicine, Epidemiology and Health Economics, Charite University Hospital, Berlin, Germany
| | - Julia Schneider
- Institute of Social Medicine, Epidemiology and Health Economics, Charite University Hospital, Berlin, Germany
| | - Julia-Sophia Scheuermann
- Centre of Health Services Research in Medicine, Department of Psychiatry and Psychotherapy, Universitätsklinikum Erlangen, Friedrich-Alexander-Universität Erlangen-Nürnberg, Erlangen, Germany
| | - Sophia Bösl
- Centre of Health Services Research in Medicine, Department of Psychiatry and Psychotherapy, Universitätsklinikum Erlangen, Friedrich-Alexander-Universität Erlangen-Nürnberg, Erlangen, Germany
| | - Michael Jeitler
- Institute of Social Medicine, Epidemiology and Health Economics, Charite University Hospital, Berlin, Germany
| | - Christian Kessler
- Institute of Social Medicine, Epidemiology and Health Economics, Charite University Hospital, Berlin, Germany
| | - Elmar Graessel
- Centre of Health Services Research in Medicine, Department of Psychiatry and Psychotherapy, Universitätsklinikum Erlangen, Friedrich-Alexander-Universität Erlangen-Nürnberg, Erlangen, Germany
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12
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Wu H, Kong L, Zeng Y, Bao H. Resting-State Brain Connectivity via Multivariate EMD in Mild Cognitive Impairment. IEEE Trans Cogn Dev Syst 2022. [DOI: 10.1109/tcds.2021.3054504] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Haifeng Wu
- School of Electrical and Information Engineering, Yunnan Minzu University, Kunming, China
| | - Lingxu Kong
- School of Electrical and Information Engineering, Yunnan Minzu University, Kunming, China
| | - Yu Zeng
- School of Electrical and Information Engineering, Yunnan Minzu University, Kunming, China
| | - Han Bao
- School of Electrical and Information Engineering, Yunnan Minzu University, Kunming, China
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13
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Book S, Jank M, Pendergrass A, Graessel E. Individualised computerised cognitive training for community-dwelling people with mild cognitive impairment: study protocol of a completely virtual, randomised, controlled trial. Trials 2022; 23:371. [PMID: 35513855 PMCID: PMC9069424 DOI: 10.1186/s13063-022-06152-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2021] [Accepted: 03/06/2022] [Indexed: 11/16/2022] Open
Abstract
Background People with mild cognitive impairment (MCI) are at increased risk of converting to dementia. Cognitive training can improve the cognitive abilities of people with MCI. Computerised cognitive training (CCT) offers several advantages over traditional paper-and-pencil cognitive training and has the potential to be more individualised by matching task difficulty with individual performance. Recent systematic reviews have reported promising effects of CCT on improving the cognitive capacities of people with MCI. However, the quality of existing studies has been limited, and it is still unclear whether CCT can influence the progression to dementia. We developed an ‘individualised’ CCT (MAKSCog) specialised for people with MCI that automatically matches task difficulty with individual performance and an active control training (‘basic’ CCT). The aims of the present study are (a) to evaluate MAKSCog and (b) to investigate whether it can be applied to maintain the cognitive abilities of people with MCI. Methods The present study investigates the effects of CCT on cognition in a randomised controlled intervention study in Germany. Participants are community-dwelling people with a psychometric diagnosis of MCI based on the Montreal Cognitive Assessment (MoCA) and Mini-Mental Status Test (MMSE). Screening and baseline testing are conducted via a videoconferencing assessment and telephone. Participants are randomly allocated. The treatment phase is 6 months with an open phase in which participants can freely decide to continue to use the CCTs. Additionally, both CCTs contain a monthly computerised cognitive assessment that measures different cognitive abilities: information processing speed, memory span, short term memory, and logical reasoning. Discussion This is the first study to investigate the effect of MAKSCog, an individualised CCT, specifically developed for people with different subtypes of MCI. A methodological strength is the double-blind, randomised, controlled design and the use of basic CCT as an active control group. The study is conducted entirely virtually with valid telehealth assessments for cognitive function. Methodological limitations might include a restriction to participants who feel comfortable with the use of technology and who own a computer, laptop, or tablet. Trial registration ISRCTN ISRCTN14437015. Prospectively registered on 27 February 2020.
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Affiliation(s)
- Stephanie Book
- Centre for Health Services Research in Medicine, Department of Psychiatry and Psychotherapy, Universitätsklinikum Erlangen, Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU), Schwabachanlage 6, 91054, Erlangen, Germany.
| | - Michael Jank
- Centre for Health Services Research in Medicine, Department of Psychiatry and Psychotherapy, Universitätsklinikum Erlangen, Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU), Schwabachanlage 6, 91054, Erlangen, Germany
| | - Anna Pendergrass
- Centre for Health Services Research in Medicine, Department of Psychiatry and Psychotherapy, Universitätsklinikum Erlangen, Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU), Schwabachanlage 6, 91054, Erlangen, Germany
| | - Elmar Graessel
- Centre for Health Services Research in Medicine, Department of Psychiatry and Psychotherapy, Universitätsklinikum Erlangen, Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU), Schwabachanlage 6, 91054, Erlangen, Germany
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14
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Abnormal EEG Signal Energy in the Elderly: A Wavelet Analysis of Event-related Potentials During a Stroop Task. J Neurosci Methods 2022; 376:109608. [PMID: 35487316 DOI: 10.1016/j.jneumeth.2022.109608] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2021] [Revised: 01/17/2022] [Accepted: 04/21/2022] [Indexed: 11/23/2022]
Abstract
BACKGROUND Previous work showed that elderly with excess in theta activity in their resting state electroencephalogram (EEG) are at higher risk of cognitive decline than those with a normal EEG. By using event-related potentials (ERP) during a counting Stroop task, our prior work showed that elderly with theta excess have a large P300 component compared with normal EEG group. This increased activity could be related to a higher EEG signal energy used during this task. NEW METHOD By wavelet analysis applied to ERP obtained during a counting Stroop task we quantified the energy in the different frequency bands of a group of elderly with altered EEG. RESULTS In theta and alpha bands, the total energy was higher in elderly subjects with theta excess, specifically in the stimulus categorization window (258-516 ms). Both groups solved the task with similar efficiency. COMPARISON WITH EXISTING METHODS The traditional ERP analysis in elderly compares voltage among conditions and groups for a given time windows, while the frequency composition is not usually examined. We complemented our previous ERP analysis using a wavelet methodology. Furthermore, we showed the advantages of wavelet analysis over Short Time Fourier Transform when exploring EEG signal during this task. CONCLUSIONS The higher EEG signal energy in ERP might reflect undergoing neurobiological mechanisms that allow the elderly with theta excess to cope with the cognitive task with similar behavioral results as the normal EEG group. This increased energy could promote a metabolic and cellular dysregulation causing a greater decline in cognitive function.
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15
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Semushina N, Mayberry R. Number Stroop Effects in Arabic Digits and ASL Number Signs: The Impact of Age and Setting of Language Acquisition. LANGUAGE LEARNING AND DEVELOPMENT : THE OFFICIAL JOURNAL OF THE SOCIETY FOR LANGUAGE DEVELOPMENT 2022; 19:95-123. [PMID: 36844479 PMCID: PMC9949749 DOI: 10.1080/15475441.2022.2047689] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 06/18/2023]
Abstract
Multiple studies have reported mathematics underachievement for students who are deaf, but the onset, scope, and causes of this phenomenon remain understudied. Early language deprivation might be one factor influencing the acquisition of numbers. In this study, we investigated a basic and fundamental mathematical skill, automatic magnitude processing, in two formats (Arabic digits and American Sign Language number signs) and the influence of age of first language exposure on both formats by using two versions of the Number Stroop Test. We compared the performance of individuals born deaf who experienced early language deprivation to that of individuals born deaf who experienced sign language in early life and hearing second language learners of ASL. In both formats of magnitude representation, late first language learners demonstrated overall slower reaction times. They were also less accurate on incongruent trials but performed no differently from early signers and second language learners on other trials. When magnitude was represented by Arabic digits, late first language learners exhibited robust Number Stroop Effects, suggesting automatic magnitude processing, but they also demonstrated a large speed difference between size and number judgments not observed in the other groups. In a task with ASL number signs, the Number Stroop Effect was not found in any group, suggesting that magnitude representation might be format-specific, in line with the results from several other languages. Late first language learners also demonstrate unusual patterns of slower reaction time for neutral rather than incongruent stimuli. Together, the results show that early language deprivation affects the ability to automatically judge quantities expressed both linguistically and by Arabic digits, but that it can be acquired later in life when language is available. Contrary to previous studies that find differences in speed of number processing between deaf and hearing participants, we find that when language is acquired early in life, deaf signers perform identically to hearing participants.
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Affiliation(s)
- Nina Semushina
- Department of Linguistics, La Jolla, UCSD, San Diego, California, USA
| | - Rachel Mayberry
- Department of Linguistics, La Jolla, UCSD, San Diego, California, USA
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16
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Won J, Callow DD, Pena GS, Gogniat MA, Kommula Y, Arnold-Nedimala NA, Jordan LS, Smith JC. Evidence for exercise-related plasticity in functional and structural neural network connectivity. Neurosci Biobehav Rev 2021; 131:923-940. [PMID: 34655658 PMCID: PMC8642315 DOI: 10.1016/j.neubiorev.2021.10.013] [Citation(s) in RCA: 38] [Impact Index Per Article: 12.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2021] [Revised: 08/10/2021] [Accepted: 10/10/2021] [Indexed: 02/07/2023]
Abstract
The number of studies investigating exercise and cardiorespiratory fitness (CRF)-related changes in the functional and structural organization of brain networks continues to rise. Functional and structural connectivity are critical biomarkers for brain health and many exercise-related benefits on the brain are better represented by network dynamics. Here, we reviewed the neuroimaging literature to better understand how exercise or CRF may facilitate and maintain the efficiency and integrity of functional and structural aspects of brain networks in both younger and older adults. Converging evidence suggests that increased exercise performance and CRF modulate functional connectivity of the brain in a way that corresponds to behavioral changes such as cognitive and motor performance improvements. Similarly, greater physical activity levels and CRF are associated with better cognitive and motor function, which may be brought about by enhanced structural network integrity. This review will provide a comprehensive understanding of trends in exercise-network studies as well as future directions based on the gaps in knowledge that are currently present in the literature.
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Affiliation(s)
- Junyeon Won
- Department of Kinesiology, University of Maryland, College Park, MD, United States
| | - Daniel D Callow
- Department of Kinesiology, University of Maryland, College Park, MD, United States; Program in Neuroscience and Cognitive Science, University of Maryland, College Park, MD, United States
| | - Gabriel S Pena
- Department of Kinesiology, University of Maryland, College Park, MD, United States
| | - Marissa A Gogniat
- Department of Psychology, University of Georgia, Athens, GA, United States
| | - Yash Kommula
- Department of Kinesiology, University of Maryland, College Park, MD, United States; Program in Neuroscience and Cognitive Science, University of Maryland, College Park, MD, United States
| | | | - Leslie S Jordan
- Program in Neuroscience and Cognitive Science, University of Maryland, College Park, MD, United States
| | - J Carson Smith
- Department of Kinesiology, University of Maryland, College Park, MD, United States; Program in Neuroscience and Cognitive Science, University of Maryland, College Park, MD, United States.
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17
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Huang HW, Nascimben M, Wang YY, Fong DY, Tzeng OJL, Huang CM. Which digit is larger? Brain responses to number and size interactions in a numerical Stroop task. Psychophysiology 2020; 58:e13744. [PMID: 33314155 DOI: 10.1111/psyp.13744] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2020] [Revised: 11/12/2020] [Accepted: 11/16/2020] [Indexed: 11/29/2022]
Abstract
When comparing the digits of different physical sizes, the processing of numerical value interacts with the processing of physical size. Given the universal use of Arabic numbers in mathematics and daily life, this study aims to elucidate the cognitive processes involved in the interactions of task-relevant and task-irrelevant features during information processing. We investigated this question by examining event-related potential (ERP) using a modified version of the size congruity comparison, which is a Stroop-like task. Numerical value and physical size were varied independently under task-relevant and task-irrelevant conditions. To better examine how the task-irrelevant features modulated the processing of the task-relevant attributes, a neutral condition was included in both tasks. For the physical task, congruent trials showed a less negative N200 response than neutral trials (indicating a facilitation effect), and incongruent trials elicited a larger N450 and smaller late positive complex (LPC) response than neutral trials (indicating an interference effect). For the numerical task, congruent trials showed a larger LPC response than neutral trials (indicating a facilitation effect). These ERP findings indicate that the sources of the facilitation and interference effects appear in different cognitive processes for each task. We further suggest that language characteristics may be a factor in the superior numerical processing exhibited in this study.
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Affiliation(s)
- Hsu-Wen Huang
- Department of Linguistics and Translation, City University of Hong Kong, Kowloon, Hong Kong
| | - Mauro Nascimben
- Department of Biological Science and Technology, National Chiao Tung University, Hsinchu, Taiwan
| | - Ya-Yi Wang
- Cognitive Neuroscience Laboratory, Institute of Linguistics Academia Sinica, Taipei, Taiwan
| | - Dong-Yang Fong
- Physical Education Office, National Taipei University of Technology, Taipei, Taiwan
| | - Ovid J-L Tzeng
- College of Humanities and Social Sciences, Taipei Medical University, Taipei, Taiwan.,Department of Educational Psychology and Counseling, National Taiwan Normal University, Taipei, Taiwan.,Hong Kong Institute for Advanced Study, City University of Hong Kong, Kowloon, Hong Kong.,Center for Intelligent Drug Systems and Smart Bio-devices (IDS2B), National Chiao Tung University, Hsinchu, Taiwan
| | - Chih-Mao Huang
- Department of Biological Science and Technology, National Chiao Tung University, Hsinchu, Taiwan.,Center for Intelligent Drug Systems and Smart Bio-devices (IDS2B), National Chiao Tung University, Hsinchu, Taiwan
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18
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Emotion regulation strategy of self-focused and situation-focused reappraisal and their impact on subsequent cognitive control. ACTA PSYCHOLOGICA SINICA 2020. [DOI: 10.3724/sp.j.1041.2020.01393] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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19
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Soman SM, Raghavan S, Rajesh P, Mohanan N, Thomas B, Kesavadas C, Menon RN. Does resting state functional connectivity differ between mild cognitive impairment and early Alzheimer's dementia? J Neurol Sci 2020; 418:117093. [DOI: 10.1016/j.jns.2020.117093] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2019] [Revised: 06/27/2020] [Accepted: 08/10/2020] [Indexed: 10/23/2022]
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20
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Zheng W, Li H, Cui B, Liang P, Wu Y, Han X, Li CR, Li K, Wang Z. Altered multimodal magnetic resonance parameters of basal nucleus of Meynert in Alzheimer's disease. Ann Clin Transl Neurol 2020; 7:1919-1929. [PMID: 32888399 PMCID: PMC7545587 DOI: 10.1002/acn3.51176] [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: 05/12/2020] [Revised: 08/12/2020] [Accepted: 08/19/2020] [Indexed: 12/11/2022] Open
Abstract
OBJECTIVES We aimed to examine how gray matter volume (GMV), regional blood flow (rCBF), and resting-state functional connectivity (FC) of the basal nucleus of Meynert (BNM) are altered in 40 patients with AD, relative to 30 healthy controls (HCs). METHODS We defined the BNM on the basis of a mask histochemically reconstructed from postmortem human brains. We examined GMV with voxel-based morphometry of high-resolution structural images, rCBF with arterial spin labeling imaging, and whole-brain FC with published routines. We performed partial correlations to explore how the imaging metrics related to cognitive and living status in patients with AD. Further, we employed receiver operating characteristic analysis to compute the "diagnostic" accuracy of these imaging markers. RESULTS AD relative to HC showed lower GMV and higher rCBF of the BNM as well as lower BNM connectivity with the right insula and cerebellum. In addition, the GMVs of BNM were correlated with cognitive and daily living status in AD. Finally, these imaging markers predicted AD (vs. HC) with an accuracy (area under the curve) of 0.70 to 0.86. Combination of BNM metrics provided the best prediction accuracy. CONCLUSIONS By combining multimode MR imaging, we demonstrated volumetric atrophy, hyperperfusion, and disconnection of the BNM in AD. These findings support cholinergic dysfunction as an etiological marker of AD and related dementia.
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Affiliation(s)
- Weimin Zheng
- Department of RadiologyAerospace Center HospitalBeijing100049China
| | - Hui Li
- Department of RadiologyChaoyang Hospital of Capital Medical UniversityBeijing100020China
| | - Bin Cui
- Department of RadiologyAerospace Center HospitalBeijing100049China
| | - Peipeng Liang
- School of PsychologyCapital Normal UniversityBeijing Key Laboratory of Learning and CognitionBeijing100037China
| | - Ye Wu
- Department of RadiologyAerospace Center HospitalBeijing100049China
| | - Xu Han
- Department of RadiologyAerospace Center HospitalBeijing100049China
| | - Chiang‐shan R. Li
- Department of PsychiatryYale University School of MedicineNew HavenConnecticutUSA
- Department of NeuroscienceYale University School of MedicineNew HavenConnecticutUSA
| | - Kuncheng Li
- Department of RadiologyXuanwu Hospital of Capital Medical UniversityBeijing100053China
| | - Zhiqun Wang
- Department of RadiologyAerospace Center HospitalBeijing100049China
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21
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He H, Xu P, Wu T, Chen Y, Wang J, Qiu Y, Fan J, Guan Q, Luo Y. Reduced Capacity of Cognitive Control in Older Adults with Mild Cognitive Impairment. J Alzheimers Dis 2019; 71:185-200. [PMID: 31356201 DOI: 10.3233/jad-181006] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Cognitive control for the coordination of mental operations is essential in normal cognitive functioning of daily life. Although the decline of cognitive control in older adults with mild cognitive impairment (MCI) has been demonstrated, whether this decline is a core deficit in MCI remains unclear. In this study, we employed a perceptual decision-making task to estimate the capacity of cognitive control (CCC) in older adults with MCI (n = 55) and the age-, sex-, and education-matched healthy controls (HC, n = 55) selected based on a commonly used battery of ten neuropsychological tests in five cognitive domains. We found that the CCC was significantly correlated to the neuropsychological measures of the battery. The mean CCC was significantly lower in the MCI group (3.06 bps) than in the HC group (3.59 bps) and significantly lower in the amnestic MCI subgroup (2.90 bps) than in the nonamnestic MCI subgroup (3.22 bps). In detecting and classifying MCI using machine learning, the classifier with the CCC as the input feature outperformed the overall classification with neuropsychological measures in a single cognitive domain. The classification performance was significantly increased when the CCC was included as a feature in addition to measures in a single domain, and the CCC served as a key feature in optimal classifiers with inputs from multiple domains. These results support the hypothesis that the decline in cognitive control is a core deficit in MCI and suggest that the CCC may serve as a key index in the diagnosis of MCI.
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Affiliation(s)
- Hao He
- School of Psychology, Shenzhen University, Shenzhen, China.,Shenzhen Key Laboratory of Affective and Social Cognitive Science, Shenzhen University, Shenzhen, China.,Center for Neuroimaging, Shenzhen Institute of Neuroscience, Shenzhen, China.,Center for Brain Disorders and Cognitive Sciences, Shenzhen University, Shenzhen, China
| | - Pengfei Xu
- School of Psychology, Shenzhen University, Shenzhen, China.,Shenzhen Key Laboratory of Affective and Social Cognitive Science, Shenzhen University, Shenzhen, China.,Center for Neuroimaging, Shenzhen Institute of Neuroscience, Shenzhen, China.,Center for Brain Disorders and Cognitive Sciences, Shenzhen University, Shenzhen, China
| | - Tingting Wu
- Department of Psychology, Queens College, The City University of New York, Queens, NY, USA
| | - Yiqi Chen
- School of Psychology, Shenzhen University, Shenzhen, China
| | - Jing Wang
- School of Psychology, Shenzhen University, Shenzhen, China
| | - Yuehong Qiu
- School of Psychology, Shenzhen University, Shenzhen, China
| | - Jin Fan
- Department of Psychology, Queens College, The City University of New York, Queens, NY, USA
| | - Qing Guan
- School of Psychology, Shenzhen University, Shenzhen, China.,Shenzhen Key Laboratory of Affective and Social Cognitive Science, Shenzhen University, Shenzhen, China.,Center for Neuroimaging, Shenzhen Institute of Neuroscience, Shenzhen, China.,Center for Brain Disorders and Cognitive Sciences, Shenzhen University, Shenzhen, China
| | - Yuejia Luo
- School of Psychology, Shenzhen University, Shenzhen, China.,Shenzhen Key Laboratory of Affective and Social Cognitive Science, Shenzhen University, Shenzhen, China.,Center for Neuroimaging, Shenzhen Institute of Neuroscience, Shenzhen, China.,Center for Brain Disorders and Cognitive Sciences, Shenzhen University, Shenzhen, China
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22
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Haeger A, Costa AS, Schulz JB, Reetz K. Cerebral changes improved by physical activity during cognitive decline: A systematic review on MRI studies. Neuroimage Clin 2019; 23:101933. [PMID: 31491837 PMCID: PMC6699421 DOI: 10.1016/j.nicl.2019.101933] [Citation(s) in RCA: 44] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2019] [Revised: 06/30/2019] [Accepted: 07/13/2019] [Indexed: 12/14/2022]
Abstract
Current treatment in late-life cognitive impairment and dementia is still limited, and there is no cure for brain tissue degeneration or reversal of cognitive decline. Physical activity represents a promising non-pharmacological interventional approach in many diseases causing cognitive impairment, but its effect on brain integrity is still largely unknown. Especially research of cerebral alterations in disease state that goes beyond observations of clinical improvement is crucial to understand disease processes and possible effective treatments. In this systematic review, we address the question how physical activity and fitness in mild cognitive impairment (MCI) and Alzheimer's disease (AD) influences brain architecture compared to cognitively healthy elderly. We review both interventional studies comprising aerobic, coordinative and resistance exercises and observational studies on fitness and physical activity combined with Magnetic Resonance imaging (MRI). Different MRI approaches were included such as volumetric and structural analyses, Diffusion Tensor Imaging (DTI), functional MRI and Cerebral Blood Flow (CBF). We evaluate MRI results for different exercise modalities and performed a methodological evaluation of interventional studies in cognitive decline compared to normal aging. According to our results, among 12 interventions in AD/MCI, aerobic exercise is most frequently applied (9 studies). Interventions in AD/MCI altogether reveal a higher methodological quality compared to interventions in healthy elderly (8.33 ± 2.19 vs. 6.25 ± 2.36 out of 13 points), with most frequent missing aspects related to descriptions of complications, lack of intention-to-treat and statistical power analyses. Effects of aerobic exercise and fitness seem to mainly impact brain structures sensitive to neurodegeneration, which especially comprise frontal, temporal and parietal regions, such as the hippocampal/parahippocampal region, precuneus, anterior cingulate and prefrontal cortex, which are reported by several studies. General fitness measured via an objective fitness assessment and questionnaires seems to have a more global cerebral effect, probably due to its long-term application, whereas distinct intervention effects of durations between 3 and 6 months seem to concentrate on more local brain regions as the hippocampus, which can also be influenced by region of interest analyses. There is still a lack of evidence on other or combined types of intervention modalities, such as resistance, coordinative as well as multicomponent exercise during cognitive decline, and complex interventions as dancing. Future research should examine their beneficial effect on brain integrity, since several non-MRI studies already point to their advantageous impact. As a further future prospect, combination and application of newly developed imaging methods such as metabolic imaging should be envisaged to understand physical activity and its cerebral influence under its many-sided facets.
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Affiliation(s)
- Alexa Haeger
- RWTH Aachen University, Department of Neurology, Aachen, Germany; JARA-BRAIN Institute Molecular Neuroscience and Neuroimaging, Forschungszentrum Jülich GmbH and RWTH Aachen University, Aachen, Germany
| | - Ana S Costa
- RWTH Aachen University, Department of Neurology, Aachen, Germany; JARA-BRAIN Institute Molecular Neuroscience and Neuroimaging, Forschungszentrum Jülich GmbH and RWTH Aachen University, Aachen, Germany
| | - Jörg B Schulz
- RWTH Aachen University, Department of Neurology, Aachen, Germany; JARA-BRAIN Institute Molecular Neuroscience and Neuroimaging, Forschungszentrum Jülich GmbH and RWTH Aachen University, Aachen, Germany
| | - Kathrin Reetz
- RWTH Aachen University, Department of Neurology, Aachen, Germany; JARA-BRAIN Institute Molecular Neuroscience and Neuroimaging, Forschungszentrum Jülich GmbH and RWTH Aachen University, Aachen, Germany.
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23
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Omura K, Matsuta S. Numerical Processing and Executive Functioning in Early Versus Middle Childhood: A Japanese Sample. Percept Mot Skills 2018; 125:1029-1054. [PMID: 30413139 DOI: 10.1177/0031512518803040] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Many previous studies have investigated developmental differences in numerical processing by manipulating numerical distance and physical size in a number sequence. While it has been theorized that children's maturity level in executive functioning affects their numerical processing, the interaction between numerical processing and executive functioning through development remains unclear. We divided 60 Japanese school children, aged 8-12 years, into three age-related groups (second graders, fourth graders, and sixth graders) and had them perform physical and numerical comparison Stroop tasks. In the physical comparison task, the numerical Stroop effect (i.e., automatic numerical processing) was evident in each group, but, in the numerical comparison task, the numerical distance effect (i.e., intentional numerical processing) was evident in each group. Also, in the numerical comparison task, the size congruity effect (an index of the attentional and inhibitory control mechanisms of executive functioning) was more salient among second graders than among fourth or sixth graders. These results suggest that numerical processing matures and then plateaus just before primary school, while executive functioning continues to develop. Thus, these data provide evidence of a developmental dissociation between numerical processing and executive functioning.
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Affiliation(s)
- Kazufumi Omura
- 1 Faculty of Education, Art, and Science, Yamagata University, Japan
| | - Shinya Matsuta
- 1 Faculty of Education, Art, and Science, Yamagata University, Japan
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24
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Melrose RJ, Jimenez AM, Riskin-Jones H, Weissberger G, Veliz J, Hasratian AS, Wilkins S, Sultzer DL. Alterations to task positive and task negative networks during executive functioning in Mild Cognitive Impairment. NEUROIMAGE-CLINICAL 2018; 19:970-981. [PMID: 30003034 PMCID: PMC6039844 DOI: 10.1016/j.nicl.2018.06.014] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/13/2018] [Revised: 05/11/2018] [Accepted: 06/12/2018] [Indexed: 12/31/2022]
Abstract
Poor executive functioning increases risk of decline in Mild Cognitive Impairment (MCI). Executive functioning can be conceptualized within the framework of working memory. While some components are responsible for maintaining representations in working memory, the central executive is involved in the manipulation of information and creation of new representations. We aimed to examine the neural correlates of these components of working memory using a maintenance working memory and visuospatial reasoning task. Twenty-five patients with amnestic MCI and 19 elderly controls (EC) completed functional MRI during reasoning and maintenance working memory tasks. In MCI, maintenance working memory was associated with hypoactivation of right frontoparietal regions and hyperactivation of left prefrontal cortex, coupled with attenuation of default mode network (DMN) relative to EC. During reasoning, MCI showed hypoactivation of parietal regions, coupled with attenuation of anterior DMN and increased deactivation of posterior DMN relative to EC. Comparing the reasoning task to the maintenance working memory task yields the central executive. In MCI, the central executive showed hypoactivation of right parietal lobe and increased deactivation of posterior DMN compared to EC. Consistent with prior work on executive functioning, MCI show different neural circuitry during visuospatial reasoning, including changes to both task positive frontoparietal regions, as well as to deactivation patterns within the DMN. Both hyperactivation of task positive networks and increased deactivation of DMN may be compensatory. MCI show changes to task positive & negative networks during executive functioning. MCI show hypoactivation of parietal cortex & attenuation of medial PFC deactivation. Hypoactivation occurs in regions vulnerable to AD pathology. MCI show hyperactivation of left PFC & more deactivation of posterior DMN. These activity increases correlate with stronger cognition and may be compensatory.
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Affiliation(s)
- Rebecca J Melrose
- Brain, Behavior & Aging Research Center, VA Greater Los Angeles Healthcare System Building 158, Room 167, 11301 Wilshire Boulevard, Los Angeles, CA 90073, USA; Dept. of Psychiatry & Biobehavioral Sciences, David Geffen School of Medicine at UCLA, 300 Medical Plaza, Los Angeles, CA 90095, USA.
| | - Amy M Jimenez
- Brain, Behavior & Aging Research Center, VA Greater Los Angeles Healthcare System Building 158, Room 167, 11301 Wilshire Boulevard, Los Angeles, CA 90073, USA; Dept. of Psychiatry & Biobehavioral Sciences, David Geffen School of Medicine at UCLA, 300 Medical Plaza, Los Angeles, CA 90095, USA
| | - Hannah Riskin-Jones
- Brain, Behavior & Aging Research Center, VA Greater Los Angeles Healthcare System Building 158, Room 167, 11301 Wilshire Boulevard, Los Angeles, CA 90073, USA
| | - Gali Weissberger
- Brain, Behavior & Aging Research Center, VA Greater Los Angeles Healthcare System Building 158, Room 167, 11301 Wilshire Boulevard, Los Angeles, CA 90073, USA
| | - Joseph Veliz
- Brain, Behavior & Aging Research Center, VA Greater Los Angeles Healthcare System Building 158, Room 167, 11301 Wilshire Boulevard, Los Angeles, CA 90073, USA
| | - Arpi S Hasratian
- Brain, Behavior & Aging Research Center, VA Greater Los Angeles Healthcare System Building 158, Room 167, 11301 Wilshire Boulevard, Los Angeles, CA 90073, USA
| | - Stacy Wilkins
- Brain, Behavior & Aging Research Center, VA Greater Los Angeles Healthcare System Building 158, Room 167, 11301 Wilshire Boulevard, Los Angeles, CA 90073, USA
| | - David L Sultzer
- Brain, Behavior & Aging Research Center, VA Greater Los Angeles Healthcare System Building 158, Room 167, 11301 Wilshire Boulevard, Los Angeles, CA 90073, USA; Dept. of Psychiatry & Biobehavioral Sciences, David Geffen School of Medicine at UCLA, 300 Medical Plaza, Los Angeles, CA 90095, USA
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25
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Abstract
In the numerical Stroop task, participants are asked to compare the physical sizes (physical task) or numerical values (numerical task) of two digits and ignore the irrelevant dimension. Participants are unable to ignore the irrelevant dimension as indicated by facilitation and interference effects. The literature suggests that there is asymmetry in the ability to adjust control in the physical and numerical tasks. The present study examined this suggestion in two experiments in which we manipulated the proportion of neutral/congruent trials in an experimental block. In addition, we examined the effects of control adjustment on the resolution of the task and informational conflicts. Our results suggest that adjustment of control can be bidirectional and is dependent on task requirements. Moreover, it might be easier to inhibit irrelevant information than to inhibit irrelevant task activation.
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Kober SE, Wood G. Repetition suppression in aging: A near-infrared spectroscopy study on the size-congruity effect. Neuroimage 2017; 157:196-208. [PMID: 28591559 DOI: 10.1016/j.neuroimage.2017.06.010] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2017] [Revised: 05/11/2017] [Accepted: 06/02/2017] [Indexed: 10/19/2022] Open
Abstract
Age-related changes in the hemodynamic response regarding inhibition capacity and repetition suppression were examined using a modified version of the numerical Stroop task. Young (20-38 yrs; M = 28 yrs; N = 18), middle-aged (47-59 yrs; M = 52 yrs; N = 17), and older participants (60-78 yrs; M = 69 yrs; N = 19) solved a physical and numerical version of the size-congruity task, in which trials from the same experimental condition were presented in triplets. Response times revealed a strong Stroop effect in both tasks (faster reaction times during neutral than during incongruent trials) and increased with participants' age. Reaction times decreased with item repetition. In line with previous studies, the hemodynamic response (relative concentration changes in oxygenated and deoxygenated hemoglobin) assessed with near-infrared spectroscopy was comparable across incongruent and neutral trials. Strong repetition suppression of the oxygenated hemoglobin response was observed in frontal brain regions as well as in the left parietal region in all age groups. In middle and right parietal regions, repetition suppression decreased with age and was absent among older participants. These results indicate a reduced adaptation of the hemodynamic response in middle and right parietal regions of older individuals' brains in response to repeated interference control.
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Affiliation(s)
- Silvia Erika Kober
- Department of Psychology, University of Graz, Universitaetsplatz 2/III, 8010 Graz, Austria; BioTechMed-Graz, Mozartgasse 12/II, 8010 Graz, Austria.
| | - Guilherme Wood
- Department of Psychology, University of Graz, Universitaetsplatz 2/III, 8010 Graz, Austria; BioTechMed-Graz, Mozartgasse 12/II, 8010 Graz, Austria.
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27
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Kashfi K, Fang D, Hou J, Al-Khalil K, Anderson R, Syapin PJ, O’Boyle MW. Spatial Attention in Binge-Drinking and Moderate-Drinking College Students: An fMRI Investigation. ALCOHOLISM TREATMENT QUARTERLY 2017. [DOI: 10.1080/07347324.2017.1322429] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Affiliation(s)
- Karl Kashfi
- Department of Pharmacology and Neuroscience, Graduate School of Biomedical Sciences, Texas Tech University Health Sciences Center, Lubbock, Texas, USA
| | - Dan Fang
- Human Development and Family Studies, College of Human Sciences, Texas Tech University, Lubbock, Texas, USA
| | - Jiancheng Hou
- Department of Radiology, School of Medicine and Public Health, University of Wisconsin-Madison, Madison, Wisconsin, USA
| | - Kareem Al-Khalil
- Human Development and Family Studies, College of Human Sciences, Texas Tech University, Lubbock, Texas, USA
| | - Ron Anderson
- Department of Math and Computer Science, Thiel College, Greenville, Pennsylvania, USA
| | - Peter J. Syapin
- Department of Pharmacology and Neuroscience, School of Medicine, Texas Tech University Health Sciences Center, Lubbock, Texas, USA
| | - Michael W. O’Boyle
- Human Development and Family Studies, College of Human Sciences, Texas Tech University, Lubbock, Texas, USA
- Department of Pharmacology and Neuroscience, Texas Tech University Health Sciences Center, Lubbock, Texas, USA
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28
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Zheng W, Liu X, Song H, Li K, Wang Z. Altered Functional Connectivity of Cognitive-Related Cerebellar Subregions in Alzheimer's Disease. Front Aging Neurosci 2017; 9:143. [PMID: 28559843 PMCID: PMC5432635 DOI: 10.3389/fnagi.2017.00143] [Citation(s) in RCA: 44] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2016] [Accepted: 04/29/2017] [Indexed: 01/27/2023] Open
Abstract
Alzheimer’s disease (AD) is the most common cause of dementia. Previous studies have found disrupted resting state functional connectivities (rsFCs) in various brain networks in the AD patients. However, few studies have focused on the rsFCs of the cerebellum and its sub-regions in the AD patients. In this study, we collected resting-state functional magnetic resonance imaging (rs-fMRI) data including 32 AD patients and 38 healthy controls (HCs). We selected two cognitive-related subregions of the cerebellum as seed region and mapped the whole-brain rsFCs for each subregion. We identified several distinct rsFC patterns of the two cognitive-related cerebellar subregions: default-mode network (DMN), frontoparietal network (FPN), visual network (VN) and sensorimotor network (SMN). Compared with the controls, the AD patients showed disrupted rsFCs in several different networks (DMN, VN and SMN), predicting the impairment of the functional integration in the cerebellum. Notably, these abnormal rsFCs of the two cerebellar subregions were closely associated with cognitive performance. Collectively, we demonstrated the distinct rsFCs patterns of cerebellar sub-regions with various functional networks, which were differentially impaired in the AD patients.
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Affiliation(s)
- Weimin Zheng
- Department of Radiology, Dongfang Hospital, Beijing University of Chinese MedicineBeijing, China
| | - Xingyun Liu
- Department of Radiology, Dongfang Hospital, Beijing University of Chinese MedicineBeijing, China
| | - Haiqing Song
- Department of Neurology, Xuanwu Hospital of Capital Medical UniversityBeijing, China
| | - Kuncheng Li
- Department of Radiology, Xuanwu Hospital of Capital Medical UniversityBeijing, China.,Beijing Key Laboratory of Magnetic Resonance Imaging and Brain InformaticsBeijing, China
| | - Zhiqun Wang
- Department of Radiology, Dongfang Hospital, Beijing University of Chinese MedicineBeijing, China
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29
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Bowtell JL, Aboo-Bakkar Z, Conway ME, Adlam ALR, Fulford J. Enhanced task-related brain activation and resting perfusion in healthy older adults after chronic blueberry supplementation. Appl Physiol Nutr Metab 2017; 42:773-779. [PMID: 28249119 DOI: 10.1139/apnm-2016-0550] [Citation(s) in RCA: 119] [Impact Index Per Article: 17.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Abstract
Blueberries are rich in flavonoids, which possess antioxidant and anti-inflammatory properties. High flavonoid intakes attenuate age-related cognitive decline, but data from human intervention studies are sparse. We investigated whether 12 weeks of blueberry concentrate supplementation improved brain perfusion, task-related activation, and cognitive function in healthy older adults. Participants were randomised to consume either 30 mL blueberry concentrate providing 387 mg anthocyanidins (5 female, 7 male; age 67.5 ± 3.0 y; body mass index, 25.9 ± 3.3 kg·m-2) or isoenergetic placebo (8 female, 6 male; age 69.0 ± 3.3 y; body mass index, 27.1 ± 4.0 kg·m-2). Pre- and postsupplementation, participants undertook a battery of cognitive function tests and a numerical Stroop test within a 1.5T magnetic resonance imaging scanner while functional magnetic resonance images were continuously acquired. Quantitative resting brain perfusion was determined using an arterial spin labelling technique, and blood biomarkers of inflammation and oxidative stress were measured. Significant increases in brain activity were observed in response to blueberry supplementation relative to the placebo group within Brodmann areas 4/6/10/21/40/44/45, precuneus, anterior cingulate, and insula/thalamus (p < 0.001) as well as significant improvements in grey matter perfusion in the parietal (5.0 ± 1.8 vs -2.9 ± 2.4%, p = 0.013) and occipital (8.0 ± 2.6 vs -0.7 ± 3.2%, p = 0.031) lobes. There was also evidence suggesting improvement in working memory (2-back test) after blueberry versus placebo supplementation (p = 0.05). Supplementation with an anthocyanin-rich blueberry concentrate improved brain perfusion and activation in brain areas associated with cognitive function in healthy older adults.
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Affiliation(s)
- Joanna L Bowtell
- a Sport and Health Sciences, University of Exeter, St Luke's Campus, Heavitree Rd., Exeter, EX1 2LU, United Kingdom
| | - Zainie Aboo-Bakkar
- a Sport and Health Sciences, University of Exeter, St Luke's Campus, Heavitree Rd., Exeter, EX1 2LU, United Kingdom
| | - Myra E Conway
- b Department of Applied Sciences, University of the West of England, Bristol, United Kingdom
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30
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Febo M, Foster TC. Preclinical Magnetic Resonance Imaging and Spectroscopy Studies of Memory, Aging, and Cognitive Decline. Front Aging Neurosci 2016; 8:158. [PMID: 27468264 PMCID: PMC4942756 DOI: 10.3389/fnagi.2016.00158] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2016] [Accepted: 06/16/2016] [Indexed: 01/14/2023] Open
Abstract
Neuroimaging provides for non-invasive evaluation of brain structure and activity and has been employed to suggest possible mechanisms for cognitive aging in humans. However, these imaging procedures have limits in terms of defining cellular and molecular mechanisms. In contrast, investigations of cognitive aging in animal models have mostly utilized techniques that have offered insight on synaptic, cellular, genetic, and epigenetic mechanisms affecting memory. Studies employing magnetic resonance imaging and spectroscopy (MRI and MRS, respectively) in animal models have emerged as an integrative set of techniques bridging localized cellular/molecular phenomenon and broader in vivo neural network alterations. MRI methods are remarkably suited to longitudinal tracking of cognitive function over extended periods permitting examination of the trajectory of structural or activity related changes. Combined with molecular and electrophysiological tools to selectively drive activity within specific brain regions, recent studies have begun to unlock the meaning of fMRI signals in terms of the role of neural plasticity and types of neural activity that generate the signals. The techniques provide a unique opportunity to causally determine how memory-relevant synaptic activity is processed and how memories may be distributed or reconsolidated over time. The present review summarizes research employing animal MRI and MRS in the study of brain function, structure, and biochemistry, with a particular focus on age-related cognitive decline.
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Affiliation(s)
- Marcelo Febo
- Department of Psychiatry, William L. and Evelyn F. McKnight Brain Institute, University of Florida Gainesville, FL, USA
| | - Thomas C Foster
- Department of Neuroscience, William L. and Evelyn F. McKnight Brain Institute, University of Florida Gainesville, FL, USA
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31
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Yeung MK, Sze SL, Woo J, Kwok T, Shum DHK, Yu R, Chan AS. Altered Frontal Lateralization Underlies the Category Fluency Deficits in Older Adults with Mild Cognitive Impairment: A Near-Infrared Spectroscopy Study. Front Aging Neurosci 2016; 8:59. [PMID: 27065857 PMCID: PMC4809883 DOI: 10.3389/fnagi.2016.00059] [Citation(s) in RCA: 42] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2016] [Accepted: 03/09/2016] [Indexed: 11/15/2022] Open
Abstract
Individuals with mild cognitive impairment (MCI) have been consistently found to have category fluency deficits. However, little is known about the neural basis of these deficits. A diversity of neuroimaging studies has revealed left-lateralized prefrontal activations due to verbal processing and control functions during the performance of category fluency tasks. Given the reports of structural and functional abnormalities in the prefrontal cortices in individuals with MCI, it is conceivable that these individuals would also exhibit altered prefrontal activation patterns during a category fluency task. The present study aimed to investigate the prefrontal dynamics during the category fluency task in older adults with MCI by using near-infrared spectroscopy (NIRS). Twenty-six older adults with MCI were compared with 26 older adults with normal cognition (NC) who were matched in age, gender, handedness, and educational level. All participants performed a category fluency task while the prefrontal dynamics were recorded. The results showed that the MCI group generated fewer unique words, made fewer switches between subcategories, and generated fewer new subcategories than did the NC group. Importantly, the NIRS results showed that the NC group exhibited a left lateralization of frontal activations during the category fluency task, while the MCI group did not exhibit such a lateralization. Furthermore, there was a significant positive correlation between the category fluency performance and the extent of lateralization, suggesting that the category fluency deficits in the MCI group could be related to frontal dysfunction. That is, the rightward shift of frontal activations in the MCI group may reflect the presence of cortical reorganization in which the contralateral regions (i.e., the right hemisphere) are recruited to take over the function that is declining in the specialized regions (i.e., the left hemisphere). Our lateralization finding may serve as an objective neural marker for distinguishing between normal aging and MCI. Our study highlights that an alteration of neural functioning is already present at the prodromal stage of dementia.
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Affiliation(s)
- Michael K Yeung
- Department of Psychology, The Chinese University of Hong Kong New Territories, Hong Kong SAR, China
| | - Sophia L Sze
- Department of Psychology, The Chinese University of Hong KongNew Territories, Hong Kong SAR, China; Chanwuyi Research Center for Neuropsychological Well-Being, The Chinese University of Hong KongNew Territories, Hong Kong SAR, China
| | - Jean Woo
- Department of Medicine and Therapeutics, The Chinese University of Hong Kong New Territories, Hong Kong SAR, China
| | - Timothy Kwok
- School of Public Health, The Chinese University of Hong Kong New Territories, Hong Kong SAR, China
| | - David H K Shum
- Menzies Health Institute Queensland and School of Applied Psychology, Griffith University Gold Coast, QLD, Australia
| | - Ruby Yu
- Department of Medicine and Therapeutics, The Chinese University of Hong Kong New Territories, Hong Kong SAR, China
| | - Agnes S Chan
- Department of Psychology, The Chinese University of Hong KongNew Territories, Hong Kong SAR, China; Chanwuyi Research Center for Neuropsychological Well-Being, The Chinese University of Hong KongNew Territories, Hong Kong SAR, China
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32
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Farràs-Permanyer L, Guàrdia-Olmos J, Peró-Cebollero M. Mild cognitive impairment and fMRI studies of brain functional connectivity: the state of the art. Front Psychol 2015; 6:1095. [PMID: 26300802 PMCID: PMC4523742 DOI: 10.3389/fpsyg.2015.01095] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2015] [Accepted: 07/16/2015] [Indexed: 11/30/2022] Open
Abstract
In the last 15 years, many articles have studied brain connectivity in Mild Cognitive Impairment patients with fMRI techniques, seemingly using different connectivity statistical models in each investigation to identify complex connectivity structures so as to recognize typical behavior in this type of patient. This diversity in statistical approaches may cause problems in results comparison. This paper seeks to describe how researchers approached the study of brain connectivity in MCI patients using fMRI techniques from 2002 to 2014. The focus is on the statistical analysis proposed by each research group in reference to the limitations and possibilities of those techniques to identify some recommendations to improve the study of functional connectivity. The included articles came from a search of Web of Science and PsycINFO using the following keywords: f MRI, MCI, and functional connectivity. Eighty-one papers were found, but two of them were discarded because of the lack of statistical analysis. Accordingly, 79 articles were included in this review. We summarized some parts of the articles, including the goal of every investigation, the cognitive paradigm and methods used, brain regions involved, use of ROI analysis and statistical analysis, emphasizing on the connectivity estimation model used in each investigation. The present analysis allowed us to confirm the remarkable variability of the statistical analysis methods found. Additionally, the study of brain connectivity in this type of population is not providing, at the moment, any significant information or results related to clinical aspects relevant for prediction and treatment. We propose to follow guidelines for publishing fMRI data that would be a good solution to the problem of study replication. The latter aspect could be important for future publications because a higher homogeneity would benefit the comparison between publications and the generalization of results.
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Affiliation(s)
- Laia Farràs-Permanyer
- Departament de Metodologia de les Ciències del Comportament, Facultat de Psicologia, Universitat de Barcelona Barcelona, Spain ; Institut de Recerca en Cervell, Cognició i Conducta Barcelona, Spain
| | - Joan Guàrdia-Olmos
- Departament de Metodologia de les Ciències del Comportament, Facultat de Psicologia, Universitat de Barcelona Barcelona, Spain ; Institut de Recerca en Cervell, Cognició i Conducta Barcelona, Spain
| | - Maribel Peró-Cebollero
- Departament de Metodologia de les Ciències del Comportament, Facultat de Psicologia, Universitat de Barcelona Barcelona, Spain ; Institut de Recerca en Cervell, Cognició i Conducta Barcelona, Spain
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33
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Beldzik E, Domagalik A, Froncisz W, Marek T. Dissociating EEG sources linked to stimulus and response evaluation in numerical Stroop task using Independent Component Analysis. Clin Neurophysiol 2015; 126:914-26. [DOI: 10.1016/j.clinph.2014.08.009] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2014] [Revised: 08/08/2014] [Accepted: 08/18/2014] [Indexed: 11/26/2022]
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34
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Li H, Hou X, Liu H, Yue C, He Y, Zuo X. Toward systems neuroscience in mild cognitive impairment and Alzheimer's disease: a meta-analysis of 75 fMRI studies. Hum Brain Mapp 2015; 36:1217-32. [PMID: 25411150 PMCID: PMC6869191 DOI: 10.1002/hbm.22689] [Citation(s) in RCA: 136] [Impact Index Per Article: 15.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2014] [Revised: 10/03/2014] [Accepted: 11/03/2014] [Indexed: 11/11/2022] Open
Abstract
Most of the previous task functional magnetic resonance imaging (fMRI) studies found abnormalities in distributed brain regions in mild cognitive impairment (MCI) and Alzheimer's disease (AD), and few studies investigated the brain network dysfunction from the system level. In this meta-analysis, we aimed to examine brain network dysfunction in MCI and AD. We systematically searched task-based fMRI studies in MCI and AD published between January 1990 and January 2014. Activation likelihood estimation meta-analyses were conducted to compare the significant group differences in brain activation, the significant voxels were overlaid onto seven referenced neuronal cortical networks derived from the resting-state fMRI data of 1,000 healthy participants. Thirty-nine task-based fMRI studies (697 MCI patients and 628 healthy controls) were included in MCI-related meta-analysis while 36 task-based fMRI studies (421 AD patients and 512 healthy controls) were included in AD-related meta-analysis. The meta-analytic results revealed that MCI and AD showed abnormal regional brain activation as well as large-scale brain networks. MCI patients showed hypoactivation in default, frontoparietal, and visual networks relative to healthy controls, whereas AD-related hypoactivation mainly located in visual, default, and ventral attention networks relative to healthy controls. Both MCI-related and AD-related hyperactivation fell in frontoparietal, ventral attention, default, and somatomotor networks relative to healthy controls. MCI and AD presented different pathological while shared similar compensatory large-scale networks in fulfilling the cognitive tasks. These system-level findings are helpful to link the fundamental declines of cognitive tasks to brain networks in MCI and AD.
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Affiliation(s)
- Hui‐Jie Li
- Key Laboratory of Behavioral ScienceInstitute of PsychologyChinese Academy of SciencesBeijing100101China
| | - Xiao‐Hui Hou
- Key Laboratory of Behavioral ScienceInstitute of PsychologyChinese Academy of SciencesBeijing100101China
- University of Chinese Academy of SciencesBeijing100049China
| | - Han‐Hui Liu
- Youth Work DepartmentChina Youth University of Political StudiesBeijing100089China
| | - Chun‐Lin Yue
- Institute of Sports MedicineSoochow UniversitySuzhou215006China
| | - Yong He
- State Key Laboratory of Cognitive Neuroscience and Learning & IDG/McGovern Institute for Brain ResearchBeijing Normal UniversityBeijing100875China
- Center for Collaboration and Innovation in Brain and Learning SciencesBeijing Normal UniversityBeijing100875China
| | - Xi‐Nian Zuo
- Key Laboratory of Behavioral ScienceInstitute of PsychologyChinese Academy of SciencesBeijing100101China
- Center for Collaboration and Innovation in Brain and Learning SciencesBeijing Normal UniversityBeijing100875China
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35
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Castellazzi G, Palesi F, Casali S, Vitali P, Sinforiani E, Wheeler-Kingshott CAM, D'Angelo E. A comprehensive assessment of resting state networks: bidirectional modification of functional integrity in cerebro-cerebellar networks in dementia. Front Neurosci 2014; 8:223. [PMID: 25126054 PMCID: PMC4115623 DOI: 10.3389/fnins.2014.00223] [Citation(s) in RCA: 51] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2014] [Accepted: 07/07/2014] [Indexed: 01/26/2023] Open
Abstract
In resting state fMRI (rs-fMRI), only functional connectivity (FC) reductions in the default mode network (DMN) are normally reported as a biomarker for Alzheimer's disease (AD). In this investigation we have developed a comprehensive strategy to characterize the FC changes occurring in multiple networks and applied it in a pilot study of subjects with AD and Mild Cognitive Impairment (MCI), compared to healthy controls (HC). Resting state networks (RSNs) were studied in 14 AD (70 ± 6 years), 12 MCI (74 ± 6 years), and 16 HC (69 ± 5 years). RSN alterations were present in almost all the 15 recognized RSNs; overall, 474 voxels presented a reduced FC in MCI and 1244 in AD while 1627 voxels showed an increased FC in MCI and 1711 in AD. The RSNs were then ranked according to the magnitude and extension of FC changes (gFC), putting in evidence 6 RSNs with prominent changes: DMN, frontal cortical network (FCN), lateral visual network (LVN), basal ganglia network (BGN), cerebellar network (CBLN), and the anterior insula network (AIN). Nodes, or hubs, showing alterations common to more than one RSN were mostly localized within the prefrontal cortex and the mesial-temporal cortex. The cerebellum showed a unique behavior where voxels of decreased gFC were only found in AD while a significant gFC increase was only found in MCI. The gFC alterations showed strong correlations (p < 0.001) with psychological scores, in particular Mini-Mental State Examination (MMSE) and attention/memory tasks. In conclusion, this analysis revealed that the DMN was affected by remarkable FC increases, that FC alterations extended over several RSNs, that derangement of functional relationships between multiple areas occurred already in the early stages of dementia. These results warrant future work to verify whether these represent compensatory mechanisms that exploit a pre-existing neural reserve through plasticity, which evolve in a state of lack of connectivity between different networks with the worsening of the pathology.
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Affiliation(s)
- Gloria Castellazzi
- Department of Industrial and Information Engineering, University of PaviaPavia, Italy
- Brain Connectivity Center, C. Mondino National Neurological InstitutePavia, Italy
| | - Fulvia Palesi
- Brain Connectivity Center, C. Mondino National Neurological InstitutePavia, Italy
- Department of Physics, University of PaviaPavia, Italy
| | - Stefano Casali
- Brain Connectivity Center, C. Mondino National Neurological InstitutePavia, Italy
- Department of Brain and Behavioral Sciences, University of PaviaPavia, Italy
| | - Paolo Vitali
- Brain MRI 3T Mondino Research Center, C. Mondino National Neurological InstitutePavia, Italy
| | - Elena Sinforiani
- Neurology Unit, C. Mondino National Neurological InstitutePavia, Italy
| | | | - Egidio D'Angelo
- Brain Connectivity Center, C. Mondino National Neurological InstitutePavia, Italy
- Department of Brain and Behavioral Sciences, University of PaviaPavia, Italy
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36
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Meusel LAC, Kansal N, Tchistiakova E, Yuen W, MacIntosh BJ, Greenwood CE, Anderson ND. A systematic review of type 2 diabetes mellitus and hypertension in imaging studies of cognitive aging: time to establish new norms. Front Aging Neurosci 2014; 6:148. [PMID: 25071557 PMCID: PMC4085499 DOI: 10.3389/fnagi.2014.00148] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2014] [Accepted: 06/17/2014] [Indexed: 12/19/2022] Open
Abstract
The rising prevalence of type 2 diabetes (T2DM) and hypertension in older adults, and the deleterious effect of these conditions on cerebrovascular and brain health, is creating a growing discrepancy between the "typical" cognitive aging trajectory and a "healthy" cognitive aging trajectory. These changing health demographics make T2DM and hypertension important topics of study in their own right, and warrant attention from the perspective of cognitive aging neuroimaging research. Specifically, interpretation of individual or group differences in blood oxygenation level dependent magnetic resonance imaging (BOLD MRI) or positron emission tomography (PET H2O(15)) signals as reflective of differences in neural activation underlying a cognitive operation of interest requires assumptions of intact vascular health amongst the study participants. Without adequate screening, inclusion of individuals with T2DM or hypertension in "healthy" samples may introduce unwanted variability and bias to brain and/or cognitive measures, and increase potential for error. We conducted a systematic review of the cognitive aging neuroimaging literature to document the extent to which researchers account for these conditions. Of the 232 studies selected for review, few explicitly excluded individuals with T2DM (9%) or hypertension (13%). A large portion had exclusion criteria that made it difficult to determine whether T2DM or hypertension were excluded (44 and 37%), and many did not mention any selection criteria related to T2DM or hypertension (34 and 22%). Of all the surveyed studies, only 29% acknowledged or addressed the potential influence of intersubject vascular variability on the measured BOLD or PET signals. To reinforce the notion that individuals with T2DM and hypertension should not be overlooked as a potential source of bias, we also provide an overview of metabolic and vascular changes associated with T2DM and hypertension, as they relate to cerebrovascular and brain health.
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Affiliation(s)
| | - Nisha Kansal
- Baycrest Centre, Rotman Research Institute Toronto, ON, Canada
| | - Ekaterina Tchistiakova
- Sunnybrook Research Institute, Heart and Stroke Foundation Canadian Partnership for Stroke Recovery Toronto, ON, Canada ; Department of Medical Biophysics, Faculty of Medicine, University of Toronto Toronto, ON, Canada
| | - William Yuen
- Baycrest Centre, Rotman Research Institute Toronto, ON, Canada ; Department of Nutritional Sciences, Faculty of Medicine, University of Toronto Toronto, ON, Canada
| | - Bradley J MacIntosh
- Sunnybrook Research Institute, Heart and Stroke Foundation Canadian Partnership for Stroke Recovery Toronto, ON, Canada ; Department of Medical Biophysics, Faculty of Medicine, University of Toronto Toronto, ON, Canada
| | - Carol E Greenwood
- Baycrest Centre, Rotman Research Institute Toronto, ON, Canada ; Department of Nutritional Sciences, Faculty of Medicine, University of Toronto Toronto, ON, Canada
| | - Nicole D Anderson
- Baycrest Centre, Rotman Research Institute Toronto, ON, Canada ; Departments of Psychology and Psychiatry, University of Toronto Toronto, ON, Canada
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Wesley MJ, Bickel WK. Remember the future II: meta-analyses and functional overlap of working memory and delay discounting. Biol Psychiatry 2014; 75:435-48. [PMID: 24041504 PMCID: PMC3943930 DOI: 10.1016/j.biopsych.2013.08.008] [Citation(s) in RCA: 145] [Impact Index Per Article: 14.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/19/2012] [Revised: 07/03/2013] [Accepted: 08/05/2013] [Indexed: 11/27/2022]
Abstract
Previously we showed that working memory training decreased the discounting of future rewards in stimulant addicts without affecting a go/no-go task. While a relationship between delay discounting and working memory is consistent with other studies, the unique brain regions of plausible causality between these two abilities have yet to be determined. Activation likelihood estimation meta-analyses were performed on foci from studies of delay discounting (DD = 449), working memory (WM = 452), finger tapping (finger tapping = 450), and response inhibition (RI = 450). Activity maps from relatively less (finger tapping) and more (RI) demanding executive tasks were contrasted with maps of DD and WM. Overlap analysis identified unique functional coincidence between DD and WM. The anterior cingulate cortex was engaged by all tasks. Finger tapping largely engaged motor-related brain areas. In addition to motor-related areas, RI engaged frontal brain regions. The right lateral prefrontal cortex was engaged by RI, DD, and WM and was contrasted out of overlap maps. A functional cluster in the posterior portion of the left lateral prefrontal cortex emerged as the largest location of unique overlap between DD and WM. A portion of the left lateral prefrontal cortex is a unique location where delay discounting and working memory processes overlap in the brain. This area, therefore, represents a therapeutic target for improving behaviors that rely on the integration of the recent past with the foreseeable future.
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Affiliation(s)
- Michael J. Wesley
- Virginia Tech Carilion Research Institute, Virginia Tech, Roanoke, VA, USA,Addiction Recovery Research Center,Human Neuroimaging Laboratory
| | - Warren K. Bickel
- Virginia Tech Carilion Research Institute, Virginia Tech, Roanoke, VA, USA,Addiction Recovery Research Center
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Migo E, Mitterschiffthaler M, O’Daly O, Dawson G, Dourish C, Craig K, Simmons A, Wilcock G, McCulloch E, Jackson S, Kopelman M, Williams S, Morris R. Alterations in working memory networks in amnestic mild cognitive impairment. AGING NEUROPSYCHOLOGY AND COGNITION 2014; 22:106-27. [DOI: 10.1080/13825585.2014.894958] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Affiliation(s)
- E.M. Migo
- King’s College London, Department of Neuroimaging, Institute of Psychiatry, London, UK
- King’s College London, Department of Psychological Medicine, Institute of Psychiatry, London, UK
| | - M. Mitterschiffthaler
- King’s College London, Department of Neuroimaging, Institute of Psychiatry, London, UK
- Department for Psychotherapy and Psychosomatics, Campus Innenstadt, Ludwig-Maximilians-University, Munich, Germany
| | - O. O’Daly
- King’s College London, Department of Neuroimaging, Institute of Psychiatry, London, UK
| | | | | | | | - A. Simmons
- King’s College London, Department of Neuroimaging, Institute of Psychiatry, London, UK
| | - G.K. Wilcock
- OPTIMA Project, Nuffield Department of Medicine, John Radcliffe Hospital, University of Oxford, Oxford, UK
| | - E. McCulloch
- OPTIMA Project, Nuffield Department of Medicine, John Radcliffe Hospital, University of Oxford, Oxford, UK
| | - S.H.D. Jackson
- Clinical Age Research Unit, King’s College Hospital, London, UK
| | - M.D. Kopelman
- King’s College London, Department of Psychological Medicine, Institute of Psychiatry, London, UK
| | - S.C.R. Williams
- King’s College London, Department of Neuroimaging, Institute of Psychiatry, London, UK
| | - R.G. Morris
- King’s College London, Department of Neuroimaging, Institute of Psychiatry, London, UK
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Puente AN, Faraco C, Terry DP, Brown C, Miller LS. Minimal functional brain differences between older adults with and without mild cognitive impairment during the stroop. AGING NEUROPSYCHOLOGY AND COGNITION 2013; 21:346-69. [PMID: 23984890 DOI: 10.1080/13825585.2013.824065] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
This investigation compared the neural correlates of inhibition in normal older adults (OAs) and OAs with mild cognitive impairment (MCI). It was hypothesized the MCI group would require a greater amount of resources for inhibition, and therefore display greater functional activation in specific regions of interest (ROIs). Twenty-six OAs without and 17 with MCI completed the Stroop task during functional neuroimaging, and completed additional out-of-scanner neuropsychological measures. During inhibition, there were minimal functional Magnetic Resonance Imaging (fMRI) differences found between groups in a priori specified ROIs and with post-hoc multiple regression analyses. However, these minimal differences did not survive corrected thresholds. Robust differences were found with several tasks of a neuropsychological screening battery. The results of this study suggest only very minimal group differences in fMRI activation during inhibition which may not reliably identify MCI, and this condition may be best detected by traditional neuropsychological techniques.
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Alzheimer disease alters the relationship of cardiorespiratory fitness with brain activity during the stroop task. Phys Ther 2013; 93:993-1002. [PMID: 23559521 PMCID: PMC3704231 DOI: 10.2522/ptj.20120465] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
BACKGROUND Despite mounting evidence that physical activity has positive benefits for brain and cognitive health, there has been little characterization of the relationship between cardiorespiratory (CR) fitness and cognition-associated brain activity as measured by functional magnetic resonance imaging (fMRI). The lack of evidence is particularly glaring for diseases such as Alzheimer disease (AD) that degrade cognitive and functional performance. OBJECTIVE The aim of this study was to describe the relationship between regional brain activity during cognitive tasks and CR fitness level in people with and without AD. DESIGN A case-control, single-observation study design was used. METHODS Thirty-four individuals (18 without dementia and 16 in the earliest stages of AD) completed maximal exercise testing and performed a Stroop task during fMRI. RESULTS Cardiorespiratory fitness was inversely associated with anterior cingulate activity in the participants without dementia (r=-.48, P=.05) and unassociated with activation in those with AD (P>.7). Weak associations of CR fitness and middle frontal cortex were noted. LIMITATIONS The wide age range and the use of a single task in fMRI rather than multiple tasks challenging different cognitive capacities were limitations of the study. CONCLUSIONS The results offer further support of the relationship between CR fitness and regional brain activity. However, this relationship may be attenuated by disease. Future work in this area may provide clinicians and researchers with interpretable and dependable regional fMRI biomarker signatures responsive to exercise intervention. It also may shed light on mechanisms by which exercise can support cognitive function.
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Biundo R, Calabrese M, Weis L, Facchini S, Ricchieri G, Gallo P, Antonini A. Anatomical correlates of cognitive functions in early Parkinson's disease patients. PLoS One 2013; 8:e64222. [PMID: 23717572 PMCID: PMC3661458 DOI: 10.1371/journal.pone.0064222] [Citation(s) in RCA: 45] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2013] [Accepted: 04/12/2013] [Indexed: 11/18/2022] Open
Abstract
Background Cognitive deficits may occur early in Parkinson's disease (PD) but the extent of cortical involvement associated with cognitive dysfunction needs additional investigations. The aim of our study is to identify the anatomical pattern of cortical thickness alterations in patients with early stage PD and its relationship with cognitive disability. Methods We recruited 29 PD patients and 21 healthy controls. All PD patients performed an extensive neuropsychological examination and 14 were diagnosed with mild cognitive impairment (PD-MCI). Surface-based cortical thickness analysis was applied to investigate the topographical distribution of cortical and subcortical alterations in early PD compared with controls and to assess the relationship between cognition and regional cortical changes in PD-MCI. Results Overall PD patients showed focal cortical (occipital-parietal areas, orbito-frontal and olfactory areas) and subcortical thinning when compared with controls. PD-MCI showed a wide spectrum of cognitive deficits and related significant regional thickening in the right parietal-frontal as well as in the left temporal-occipital areas. Conclusion Our results confirm the presence of changes in grey matter thickness at relatively early PD stage and support previous studies showing thinning and atrophy in the neocortex and subcortical regions. Relative cortical thickening in PD-MCI may instead express compensatory neuroplasticity. Brain reserve mechanisms might first modulate cognitive decline during the initial stages of PD.
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Affiliation(s)
- Roberta Biundo
- Department for Parkinson's Disease, "Fondazione Ospedale San Camillo," I.R.C.C.S., Venice, Italy.
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Sasanguie D, Göbel SM, Reynvoet B. Left parietal TMS disturbs priming between symbolic and non-symbolic number representations. Neuropsychologia 2013; 51:1528-33. [PMID: 23665379 DOI: 10.1016/j.neuropsychologia.2013.05.001] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2012] [Revised: 02/21/2013] [Accepted: 05/01/2013] [Indexed: 11/24/2022]
Abstract
An amodal number representation activated by all types of numerical input, irrespective of the input notation, has often been proposed to be located in the left or right intraparietal sulcus (IPS). Two cross-notational priming experiments were carried out to test the existence of a notation-independent magnitude representation in the left or right parietal lobes. In Experiment 1, stimuli were Arabic digits and number words. Results revealed no significant effect of repetitive transcranial magnetic stimulation (rTMS) over left or right IPS during prime presentation. In contrast, in Experiment 2, digits and dot patterns were intermixed and here the priming distance effect (PDE) was reduced in the right TMS condition and absent for stimulation over left IPS. These findings suggest: (1) that TMS over left but not right IPS disrupts processes that are crucial for priming when symbolic and non-symbolic stimuli are intermixed, and (2) that disruption of the left IPS on its own is not sufficient to disrupt cross-notational priming when purely symbolic number notations are used. Our results point towards a crucial role of the left hemisphere for the mapping between small symbolic and non-symbolic numerosities.
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Affiliation(s)
- Delphine Sasanguie
- Laboratory of Experimental Psychology, KU Leuven Sub-faculty of Psychology and Educational Sciences, KU Leuven, Leuven, Belgium.
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Gertner L, Henik A, Reznik D, Cohen Kadosh R. Implications of number-space synesthesia on the automaticity of numerical processing. Cortex 2012; 49:1352-62. [PMID: 22578710 PMCID: PMC3428851 DOI: 10.1016/j.cortex.2012.03.019] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2011] [Revised: 03/16/2012] [Accepted: 03/17/2012] [Indexed: 11/29/2022]
Abstract
Number-space synesthetes visualize numbers in specific spatial configurations. Their spatial-numerical perceptions are assumed to be automatic in nature and have been found to affect performance in various numerical tasks. The current study tested whether synesthetic number-space associations can modulate the well-established Size Congruency Effect (SiCE), which is considered to be an indication for the automaticity of numerical processing. Two groups, number-space synesthetes and matched controls, were tested on a numerical Stroop task (Henik and Tzelgov, 1982). In separate blocks, participants were presented with two digits and asked to make comparative judgments regarding either numerical values (numerical comparison) or physical size (physical comparison). Both dimensions were manipulated orthogonally, creating three congruency levels: congruent (e.g., 2 7), incongruent (e.g., 2 7) and neutral (e.g., 2 2 and 2 7 for physical and numerical blocks, respectively). For the numerical block, both synesthetes and controls showed the classic SiCE, indicating similar automatic processing of physical magnitude. However, in the physical block, synesthetes showed a lack of automatic numerical magnitude processing when the numbers to be compared were presented incompatibly with their relative position on the synesthetic number-form. This finding strongly suggests that synesthetes’ number-space perceptions affect their ability to automatically process the semantic meaning of numerals. The involvement of space in automatic magnitude processing for number-space synesthetes and non-synesthetes is discussed.
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Affiliation(s)
- Limor Gertner
- Department of Psychology and the Zlotowski Center for Neuroscience, Ben-Gurion University of the Negev, Beer-Sheva, Israel.
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Veldhuijzen DS, Sondaal SF, Oosterman JM. Intact Cognitive Inhibition in Patients With Fibromyalgia but Evidence of Declined Processing Speed. THE JOURNAL OF PAIN 2012; 13:507-15. [DOI: 10.1016/j.jpain.2012.02.011] [Citation(s) in RCA: 56] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/18/2011] [Revised: 01/27/2012] [Accepted: 02/29/2012] [Indexed: 01/12/2023]
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Dong G, DeVito EE, Du X, Cui Z. Impaired inhibitory control in 'internet addiction disorder': a functional magnetic resonance imaging study. Psychiatry Res 2012; 203:153-8. [PMID: 22892351 PMCID: PMC3650485 DOI: 10.1016/j.pscychresns.2012.02.001] [Citation(s) in RCA: 146] [Impact Index Per Article: 12.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/09/2011] [Revised: 01/23/2012] [Accepted: 02/02/2012] [Indexed: 12/16/2022]
Abstract
'Internet addiction disorder' (IAD) is rapidly becoming a prevalent mental health concern in many countries around the world. The neurobiological underpinnings of internet addiction should be studied to unravel the potential heterogeneity in the disorder. The present study examines the neural correlates of response inhibition in males with and without IAD using an event-related functional magnetic resonance imaging (fMRI) Stroop task. The IAD group demonstrated significantly greater 'Stroop effect'-related activity in the anterior and posterior cingulate cortices compared with their healthy peers. These results may suggest diminished efficiency of response-inhibition processes in the IAD group relative to healthy controls.
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Affiliation(s)
- Guangheng Dong
- Department of Psychology, Zhejiang Normal University, Jinhua City, Zhejiang Province, People's Republic of China.
| | - Elise E. DeVito
- Department of Psychiatry, Yale University School of Medicine, New Haven, CT, USA
| | - Xiaoxia Du
- Department of Physics, Shanghai Key Laboratory of Magnetic Resonance, East China Normal University, Shanghai. P.R.China
| | - Zhuoya Cui
- Department of Psychology, East China Normal University, Shanghai. P.R.China
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Eppig J, Wambach D, Nieves C, Price CC, Lamar M, Delano-Wood L, Giovannetti T, Bettcher BM, Penney DL, Swenson R, Lippa C, Kabasakalian A, Bondi MW, Libon DJ. Dysexecutive functioning in mild cognitive impairment: derailment in temporal gradients. J Int Neuropsychol Soc 2012; 18:20-8. [PMID: 22014116 PMCID: PMC3315354 DOI: 10.1017/s1355617711001238] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Libon et al. (2010) provided evidence for three statistically determined clusters of patients with mild cognitive impairment (MCI): amnesic (aMCI), dysexecutive (dMCI), and mixed (mxMCI). The current study further examined dysexecutive impairment in MCI using the framework of Fuster's (1997) derailed temporal gradients, that is, declining performance on executive tests over time or test epoch. Temporal gradients were operationally defined by calculating the slope of aggregate letter fluency output across 15-s epochs and accuracy indices for initial, middle, and latter triads from the Wechsler Memory Scale-Mental Control subtest (Boston Revision). For letter fluency, slope was steeper for dMCI compared to aMCI and NC groups. Between-group Mental Control analyses for triad 1 revealed worse dMCI performance than NC participants. On triad 2, dMCI scored lower than aMCI and NCs; on triad 3, mxMCI performed worse versus NCs. Within-group Mental Control analyses yielded equal performance across all triads for aMCI and NC participants. mxMCI scored lower on triad 1 compared to triads 2 and 3. dMCI participants also performed worse on triad 1 compared to triads 2 and 3, but scored higher on triad 3 versus triad 2. These data suggest impaired temporal gradients may provide a useful heuristic for understanding dysexecutive impairment in MCI.
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Affiliation(s)
- Joel Eppig
- Department of Neurology, Drexel University, College of Medicine, Philadelphia, Pennsylvania
| | - Denene Wambach
- Department of Neurology, Drexel University, College of Medicine, Philadelphia, Pennsylvania
| | - Christine Nieves
- Department of Neurology, Drexel University, College of Medicine, Philadelphia, Pennsylvania
| | - Catherine C. Price
- Department of Clinical and Health Psychology, University of Florida, Gainesville, Florida
| | - Melissa Lamar
- Department of Psychiatry, University of Illinois, Chicago, Illinois
| | - Lisa Delano-Wood
- Department of Psychiatry, University of California San Diego, School of Medicine, San Diego, California and the Psychology Service, Veterans Administration San Diego Healthcare System, San Diego, California
| | - Tania Giovannetti
- Department of Psychology, Temple University, Philadelphia, Pennsylvania
| | | | - Dana L. Penney
- Department of Neurology, The Lahey Clinic, Burlington, Massachusetts
| | - Rod Swenson
- Department of Neuroscience, University of North Dakota Medical School, Fargo, North Dakota
| | - Carol Lippa
- Department of Neurology, Drexel University, College of Medicine, Philadelphia, Pennsylvania
| | - Anahid Kabasakalian
- Department of Neurology, Drexel University, College of Medicine, Philadelphia, Pennsylvania
| | - Mark W. Bondi
- Department of Psychiatry, University of California San Diego, School of Medicine, San Diego, California and the Psychology Service, Veterans Administration San Diego Healthcare System, San Diego, California
| | - David J. Libon
- Department of Neurology, Drexel University, College of Medicine, Philadelphia, Pennsylvania
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Olk B. Measuring the allocation of attention in the Stroop task: evidence from eye movement patterns. PSYCHOLOGICAL RESEARCH 2011; 77:106-15. [DOI: 10.1007/s00426-011-0405-9] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2011] [Accepted: 12/06/2011] [Indexed: 11/30/2022]
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Koten JW, Lonnemann J, Willmes K, Knops A. Micro and macro pattern analyses of FMRI data support both early and late interaction of numerical and spatial information. Front Hum Neurosci 2011; 5:115. [PMID: 22028688 PMCID: PMC3199539 DOI: 10.3389/fnhum.2011.00115] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2011] [Accepted: 09/27/2011] [Indexed: 11/13/2022] Open
Abstract
Numbers and space are two semantic primitives that interact with each other. Both recruit brain regions along the dorsal pathway, notably parietal cortex. This makes parietal cortex a candidate for the origin of numerical-spatial interaction. The underlying cognitive architecture of the interaction is still under scrutiny. Two classes of explanations can be distinguished. The early interaction approach assumes that numerical and spatial information are integrated into a single representation at a semantic level. A second approach postulates independent semantic representations. Only at the stage of response selection and preparation these two streams interact. In this study we used a numerical landmark task to identify the locus of the interaction between numbers and space. While lying in an MR scanner participants decided on the smaller of two numerical intervals in a visually presented number triplet. The spatial position of the middle number was varied; hence spatial intervals were congruent or incongruent with the numerical intervals. Responses in incongruent trials were slower and less accurate than in congruent trials. By combining across-vertex correlations (micro pattern) with a cluster analysis (macro pattern) we identified large-scale networks that were devoted to number processing, eye movements, and sensory-motor functions. Using support vector classification in different regions of interest along the intraparietal sulcus, the frontal eye fields, and supplementary motor area we were able to distinguish between congruent and incongruent trials in each of the networks. We suggest that the identified networks participate in the integration of numerical and spatial information and that the exclusive assumption of either an early or a late interaction between numerical and spatial information does not do justice to the complex interaction between both dimensions.
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Affiliation(s)
- Jan Willem Koten
- Section Neuropsychology, Neurological Clinic, University Hospital Aachen Aachen, Germany
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Liang P, Wang Z, Yang Y, Jia X, Li K. Functional disconnection and compensation in mild cognitive impairment: evidence from DLPFC connectivity using resting-state fMRI. PLoS One 2011; 6:e22153. [PMID: 21811568 PMCID: PMC3141010 DOI: 10.1371/journal.pone.0022153] [Citation(s) in RCA: 122] [Impact Index Per Article: 9.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2010] [Accepted: 06/17/2011] [Indexed: 11/26/2022] Open
Abstract
The known regional abnormality of the dorsolateral prefrontal cortex (DLPFC) and its role in various neural circuits in mild cognitive impairment (MCI) has given prominence to its importance in studies on the disconnection associated with MCI. The purpose of the current study was to examine the DLPFC functional connectivity patterns during rest in MCI patients and the impact of regional grey matter (GM) atrophy on the functional results. Structural and functional MRI data were collected from 14 MCI patients and 14 age, gender-matched healthy controls. We found that both the bilateral DLPFC showed reduced functional connectivity with the inferior parietal lobule (IPL), superior/medial frontal gyrus and sub-cortical regions (e.g., thalamus, putamen) in MCI patients when compared with healthy controls. Moreover, the DLPFC connectivity with the IPL and thalamus significantly correlated with the cognitive performance of patients as measured by mini-mental state examination (MMSE), clock drawing test (CDT), and California verbal learning test (CVLT) scores. When taking GM atrophy as covariates, these results were approximately consistent with those without correction, although there may be a decrease in the statistical power. These results suggest that the DLPFC disconnections may be the substrates of cognitive impairments in MCI patients. In addition, we also found enhanced functional connectivity between the left DLPFC and the right prefrontal cortex in MCI patients. This is consistent with previous findings of MCI-related increased activation during cognitive tasks, and may represent a compensatory mechanism in MCI patients. Together, the present study demonstrated the coexistence of functional disconnection and compensation in MCI patients using DLPFC functional connectivity analysis, and thus might provide insights into biological mechanism of the disease.
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Affiliation(s)
- Peipeng Liang
- Xuanwu Hospital, Capital Medical University, Beijing, China
- The International WIC Institute, Beijing University of Technology, Beijing, China
- Beijing Municipal Lab of Brain Informatics, Beijing, China
| | - Zhiqun Wang
- Xuanwu Hospital, Capital Medical University, Beijing, China
| | - Yanhui Yang
- Xuanwu Hospital, Capital Medical University, Beijing, China
| | - Xiuqin Jia
- Xuanwu Hospital, Capital Medical University, Beijing, China
- Beijing Municipal Lab of Brain Informatics, Beijing, China
| | - Kuncheng Li
- Xuanwu Hospital, Capital Medical University, Beijing, China
- Beijing Municipal Lab of Brain Informatics, Beijing, China
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