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Luria's legacy in the era of cognitive neuroscience
IF 3.2 2区 心理学 Q1 BEHAVIORAL SCIENCES Pub Date : 2025-02-20 DOI: 10.1016/j.cortex.2025.02.002
Marco Catani , Elkhonon Goldberg
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引用次数: 0
Clinical and metabolic profiles in behavioural frontotemporal dementia: Impact of age at onset
IF 3.2 2区 心理学 Q1 BEHAVIORAL SCIENCES Pub Date : 2025-02-11 DOI: 10.1016/j.cortex.2025.01.011
Mattia Losa , Sara Garbarino , Alessio Cirone , Lucia Argenti , Lorenzo Lombardo , Francesco Calizzano , Nicola Girtler , Andrea Brugnolo , Pietro Mattioli , Matteo Bauckneht , Stefano Raffa , Gianmario Sambuceti , Antonio Canosa , Stefano Caneva , Michele Piana , Giulia Bozzo , Luca Roccatagliata , Gianluca Serafini , Antonio Uccelli , Fabio Gotta , Matteo Pardini

Aim

Frontotemporal dementia (FTD) is a heterogeneous neurodegenerative disorder, with considerable variability of age-at-onset. We explored clinical and metabolic differences between early- and late-onset behavioural FTD (bvFTD), assuming that they might represent different disease phenotypes.

Materials and methods

We retrospectively studied consecutive patients diagnosed with prodromal or overt bvFTD with [18F]FDG PET scan, neuropsychological assessment (NPS), and Neuropsychiatric Inventory (NPI) available at baseline. Patients were divided into three groups based on age-at-onset: early onset-bvFTD (EO-bvFTD, age<70), late onset-bvFTD (LO-bvFTD, age 70–75) and very late onset-bvFTD (vLO-bvFTD, age>75). NPS and NPI were compared between groups and in the subset of prodromal patients, to study different syndromic phenotypes. Voxel-based analysis compared brain [18F]FDG PET of EO-bvFTD, LO-bvFTD and vLO-bvFTD independently, with respect to healthy controls, to explore metabolic differences. An inter-regional metabolic covariance analysis was performed in frontal lobe subregions, to explore differences in brain connectivity. Moreover, we supported our result using a correlation-based approach on clinical and metabolic variables.

Results

101 bvFTD (62 prodromal bvFTD) were enrolled (EO-bvFTD: n = 36, prodromal n = 21; LO-bvFTD: n = 36, prodromal: n = 22; vLO-bvFTD: n = 29, prodromal: n = 19). Greater verbal memory deficit was evident in LO-bvFTD and vLO-bvFTD compared to EO-bvFTD (immediate recall: p = .018; p = .024; delayed recall: both p = .001, respectively), with similar results in the subset of prodromal patients. EO-bvFTD and LO-bvFTD had a higher behavioural severity than vLO-bvFTD. LO-bvFTD and vLO-bvFTD showed more widespread relative hypometabolism, with a greater involvement of posterior, subcortical and temporo-limbic regions compared with EO-bvFTD. Moreover, vLO-bvFTD showed a different pattern of intrafrontal metabolic covariance compared to EO-bvFTD and LO-bvFTD.

Discussion

The cognitive–behavioural profile of bvFTD differs between early- and late-onset, already from the prodromal stage of the disease. Both metabolic pattern and functional connectivity vary based on age-at-onset. Understanding these differences could contribute to improve diagnostic accuracy and understanding the underling pathological heterogeneity.
{"title":"Clinical and metabolic profiles in behavioural frontotemporal dementia: Impact of age at onset","authors":"Mattia Losa ,&nbsp;Sara Garbarino ,&nbsp;Alessio Cirone ,&nbsp;Lucia Argenti ,&nbsp;Lorenzo Lombardo ,&nbsp;Francesco Calizzano ,&nbsp;Nicola Girtler ,&nbsp;Andrea Brugnolo ,&nbsp;Pietro Mattioli ,&nbsp;Matteo Bauckneht ,&nbsp;Stefano Raffa ,&nbsp;Gianmario Sambuceti ,&nbsp;Antonio Canosa ,&nbsp;Stefano Caneva ,&nbsp;Michele Piana ,&nbsp;Giulia Bozzo ,&nbsp;Luca Roccatagliata ,&nbsp;Gianluca Serafini ,&nbsp;Antonio Uccelli ,&nbsp;Fabio Gotta ,&nbsp;Matteo Pardini","doi":"10.1016/j.cortex.2025.01.011","DOIUrl":"10.1016/j.cortex.2025.01.011","url":null,"abstract":"<div><h3>Aim</h3><div>Frontotemporal dementia (FTD) is a heterogeneous neurodegenerative disorder, with considerable variability of age-at-onset. We explored clinical and metabolic differences between early- and late-onset behavioural FTD (bvFTD), assuming that they might represent different disease phenotypes.</div></div><div><h3>Materials and methods</h3><div>We retrospectively studied consecutive patients diagnosed with prodromal or overt bvFTD with [<sup>18</sup>F]FDG PET scan, neuropsychological assessment (NPS), and Neuropsychiatric Inventory (NPI) available at baseline. Patients were divided into three groups based on age-at-onset: early onset-bvFTD (EO-bvFTD, age&lt;70), late onset-bvFTD (LO-bvFTD, age 70–75) and very late onset-bvFTD (vLO-bvFTD, age&gt;75). NPS and NPI were compared between groups and in the subset of prodromal patients, to study different syndromic phenotypes. Voxel-based analysis compared brain [<sup>18</sup>F]FDG PET of EO-bvFTD, LO-bvFTD and vLO-bvFTD independently, with respect to healthy controls, to explore metabolic differences. An inter-regional metabolic covariance analysis was performed in frontal lobe subregions, to explore differences in brain connectivity. Moreover, we supported our result using a correlation-based approach on clinical and metabolic variables.</div></div><div><h3>Results</h3><div>101 bvFTD (62 prodromal bvFTD) were enrolled (EO-bvFTD: <em>n</em> = 36, prodromal <em>n</em> = 21; LO-bvFTD: <em>n</em> = 36, prodromal: <em>n</em> = 22; vLO-bvFTD: <em>n</em> = 29, prodromal: <em>n</em> = 19). Greater verbal memory deficit was evident in LO-bvFTD and vLO-bvFTD compared to EO-bvFTD (immediate recall: <em>p</em> = .018; <em>p</em> = .024; delayed recall: both <em>p</em> = .001, respectively), with similar results in the subset of prodromal patients. EO-bvFTD and LO-bvFTD had a higher behavioural severity than vLO-bvFTD. LO-bvFTD and vLO-bvFTD showed more widespread relative hypometabolism, with a greater involvement of posterior, subcortical and temporo-limbic regions compared with EO-bvFTD. Moreover, vLO-bvFTD showed a different pattern of intrafrontal metabolic covariance compared to EO-bvFTD and LO-bvFTD.</div></div><div><h3>Discussion</h3><div>The cognitive–behavioural profile of bvFTD differs between early- and late-onset, already from the prodromal stage of the disease. Both metabolic pattern and functional connectivity vary based on age-at-onset. Understanding these differences could contribute to improve diagnostic accuracy and understanding the underling pathological heterogeneity.</div></div>","PeriodicalId":10758,"journal":{"name":"Cortex","volume":"185 ","pages":"Pages 84-95"},"PeriodicalIF":3.2,"publicationDate":"2025-02-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143474144","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"心理学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Individual differences in anterograde memory for details relate to posterior hippocampal volume
IF 3.2 2区 心理学 Q1 BEHAVIORAL SCIENCES Pub Date : 2025-02-10 DOI: 10.1016/j.cortex.2025.01.012
Jeremy Gardette , Gabriel Besson , Marion Baillet , Lou Rizzolo , Justinas Narbutas , Maxime Van Egroo , Daphne Chylinski , Pierre Maquet , Eric Salmon , Gilles Vandewalle , Fabienne Collette , Christine Bastin
In recent years, there has been a growing interest in individual differences in autobiographical memory. The ability to recall details from personal past events correlates with the volume of specific hippocampal subfields in healthy adults. Although the posterior hippocampus is believed to process detailed memory representations independently of the memory's age, little is known about individual differences in the ability to recall newly encoded events in detail, and how these differences relate to hippocampal subregions. In this preregistered study, we scored the story recalls from 89 healthy middle-aged participants with a newly designed method that allows to distinguish information recalled in detail from gist recall (i.e., when only the general idea is recalled). After a 20-min delay, detailed information was transformed into gists, which is in line with recent evidence that gists can emerge rapidly after a new experience. In addition, we segmented the anterior and posterior hippocampal subfields CA1, CA2/3, dentate gyrus, and subiculum from high-resolution structural MRI. As predicted, the volume of the posterior hippocampus was positively correlated with the detail score but not with the gist score, yet this effect was significant in the right hemisphere only. We also observed trends towards associations between the detail score and specific subfields of the right posterior hippocampus, but none survived statistical correction for multiple comparisons. Finally, we found no evidence for the expected age-related increase in the use of gists over details. Taken together, these results suggest that the posterior hippocampus supports detail memory in the recall of both remote and newly acquired memories.
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引用次数: 0
Cognitive reserve types and depressive symptoms development in late-life: A population-based cohort study
IF 3.2 2区 心理学 Q1 BEHAVIORAL SCIENCES Pub Date : 2025-02-08 DOI: 10.1016/j.cortex.2025.02.001
Federico Triolo , Giulia Grande , Ingrid Ekström , Erika J. Laukka , Stefan Fors , Anna Marseglia , Serhiy Dekhtyar

Introduction

Cognitive reserve (CR) describes individual differences in susceptibility to brain damage that translates into varying dementia onsets and may also influence the occurrence of depressive symptoms. Within a population-based cohort of older people, we investigated two operationalizations of CR, residual- and activity-based approaches, in their association with the development of depressive symptoms.

Methods

We analyzed longitudinal data on 402 dementia- and depression-free adults aged 60+ from the Swedish National Study on Aging and Care in Kungsholmen (SNAC-K) who underwent brain MRI at baseline. Residual-based reserve was derived by regressing episodic memory on a brain-integrity index incorporating six structural MRI markers. Activity-based reserve factored lifelong CR-enhancing experiences, including education, work complexity, social network, and leisure activities. Clinically relevant depressive symptoms were defined as a Montgomery–Åsberg Depression Rating Scale score >6. Cox hazard models were used to explore the association between both residual- and activity-based CR measures (categorized in tertiles) and incidence of depressive symptoms over a 15-year follow-up, while accounting for sociodemographic, clinical, behavioral factors, and brain integrity. Analyses for the activity-based measure were replicated in the full SNAC-K sample (N = 2709), further exploring depression diagnosis as additional outcome.

Results

Compared to low levels, higher levels of residual-based CR were associated with a lower hazard of depressive symptom onset in fully adjusted models (HR: .43, 95%CI .22, .84). While activity-based CR was not significantly associated with developing depressive symptoms in the MRI subsample (HRhigh .47, 95%CI .21, 1.04), it was in the full sample (HRhigh .52, 95%CI .39, .71). Activity-based CR was further associated with depression diagnoses in the full sample (HRhigh: .45, 95%CI .31, .65).

Discussion

Largely independent of its measurement, CR appears to influence depressive symptomatology in late life. Reserve-enhancing initiatives may be beneficial not only for cognitive but also for mental health in older people.
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引用次数: 0
Outbalanced: The cross-cortical effects of prefrontal neuromodulation in posterior parietal cortex
IF 3.2 2区 心理学 Q1 BEHAVIORAL SCIENCES Pub Date : 2025-02-05 DOI: 10.1016/j.cortex.2025.01.009
Maryam Farshad , Beatrix Barth , Jennifer Svaldi , Christina Artemenko , Philipp A. Schroeder
Cognitive phenomena such as the Spatial–Numerical Association of Response Codes (SNARC) effect can arise in the fronto-parietal cortical network. Prior neuromodulation studies with cathodal transcranial direct current stimulation (tDCS) over the left prefrontal cortex (PFC) reduced the SNARC effect. Prior neuroimaging studies with functional near-infrared spectroscopy (fNIRS), however, showed signatures of the SNARC effect in the posterior parietal cortex (PPC). In this study, we investigated the distant neural effect of prefrontal neuromodulation on hemodynamic activity in the parietal cortex by combining cathodal tDCS with fNIRS. The SNARC effect and the numerical distance effect (NDE) were assessed in an event-related cross-over design (N = 45), when cathodal tDCS of 1 mA at the left PFC was applied simultaneously during the measurement of fNIRS covering the bilateral PPC. At the behavioral level, prefrontal tDCS did not significantly reduce the SNARC effect, indicating that the replication failed here. Crucially, at the neuronal level, prefrontal tDCS reduced left parietal activation associated with the SNARC effect but not with the NDE. This neuronal effect of tDCS in a remote site was shown in preregistered primary region-of-interest analyses and in secondary all-channel analyses. The results showed how the combination of neuromodulation and neuroimaging shed light on the fronto-parietal network responsible for numerical cognition, and how fNIRS can assess the distant neural effects of cathodal tDCS.
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引用次数: 0
Aleksander Luria and Oliver Sacks: An inspiring correspondence
IF 3.2 2区 心理学 Q1 BEHAVIORAL SCIENCES Pub Date : 2025-02-04 DOI: 10.1016/j.cortex.2025.01.010
Sergio Della Sala , Kate Edgar , Elkhonon Goldberg , Marco Catani
Aleksander Luria and Oliver Sacks corresponded from 1973 to Luria’s death in 1977. Here we reproduce and analyse the initial two years of their exchange, exploring their shared views on key themes including "Romantic Science," the value of individual patient narratives, and the socio-historical context on brain development . The correspondence reveals Luria's mentorship of Sacks and his significant impact on Sacks' approach to neurological case studies.
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引用次数: 0
The network neuropsychology of juvenile myoclonic epilepsy
IF 3.2 2区 心理学 Q1 BEHAVIORAL SCIENCES Pub Date : 2025-02-04 DOI: 10.1016/j.cortex.2024.12.025
Camille Garcia-Ramos , Aaron F. Struck , Veena A. Nair , Vivek Prabhakaran , Theodore P. Imhoff-Smith , Nagesh Adluru , Dace N. Almane , Jana E. Jones , Bruce P. Hermann
Unknown in the clinical neuropsychology of Juvenile Myoclonic Epilepsy (JME) is the impact of the disorder on the nature of the relationships of specific cognitive abilities among themselves including their patterns of integration, segregation, and topographical organization—that is, the network neuropsychology of JME remains to be addressed. Examined here is the status of cognitive networks in JME and whether similar network alterations are present in the unaffected siblings of patients with this genetic generalized epilepsy. Participants included 78 with JME (mean age = 19.8 ± 3.7 yrs), 19 unaffected siblings (mean age = 15.9 ± 3.3 yrs) and 43 unrelated controls (mean age = 20.2 ± 3.2 yrs), all administered a comprehensive clinical neuropsychological battery from which 15 metrics served as nodes for graph theory analyses. Calculated were global metric indices (i.e., normalized global efficiency, normalized average clustering coefficient, modularity) and landmark “hubs” by calculating betweenness centrality. Salient JME network findings included: 1) significantly greater intercorrelation of test measures (i.e., increased positive manifold), 2) significantly lower segregation (i.e., normalized average clustering coefficient) but similar network efficiency (i.e., normalized global efficiency), and 3) significantly lower strength of the division of the cognitive modules in the network (i.e., modularity index). Regarding the topographical structure of identified cognitive networks (i.e., their community structure), unaffected siblings and unrelated controls demonstrated three cognitive modules (speed/executive function, perceptual, language) while JME demonstrated two modules—one of which was undifferentiated and “g-like”, and speed/executive function. Overall, JME is associated with less segregation of cognitive subsystems (i.e., modules) indicating less specialization in cognitive processes, abnormalities in the interrelationships of psychometric measures as well as the general configuration of their resulting cognitive networks (fewer in number and atypical in content and structure) which appear to be contributing to their generally poorer cognitive status compared to controls. Unaffected siblings show some penetrance of these atypical network features.
{"title":"The network neuropsychology of juvenile myoclonic epilepsy","authors":"Camille Garcia-Ramos ,&nbsp;Aaron F. Struck ,&nbsp;Veena A. Nair ,&nbsp;Vivek Prabhakaran ,&nbsp;Theodore P. Imhoff-Smith ,&nbsp;Nagesh Adluru ,&nbsp;Dace N. Almane ,&nbsp;Jana E. Jones ,&nbsp;Bruce P. Hermann","doi":"10.1016/j.cortex.2024.12.025","DOIUrl":"10.1016/j.cortex.2024.12.025","url":null,"abstract":"<div><div>Unknown in the clinical neuropsychology of Juvenile Myoclonic Epilepsy (JME) is the impact of the disorder on the nature of the relationships of specific cognitive abilities among themselves including their patterns of integration, segregation, and topographical organization—that is, the network neuropsychology of JME remains to be addressed. Examined here is the status of cognitive networks in JME and whether similar network alterations are present in the unaffected siblings of patients with this genetic generalized epilepsy. Participants included 78 with JME (mean age = 19.8 <span><math><mrow><mo>±</mo></mrow></math></span> 3.7 yrs), 19 unaffected siblings (mean age = 15.9 <span><math><mrow><mo>±</mo></mrow></math></span> 3.3 yrs) and 43 unrelated controls (mean age = 20.2 <span><math><mrow><mo>±</mo></mrow></math></span> 3.2 yrs), all administered a comprehensive clinical neuropsychological battery from which 15 metrics served as nodes for graph theory analyses. Calculated were global metric indices (i.e., normalized global efficiency, normalized average clustering coefficient, modularity) and landmark “hubs” by calculating betweenness centrality. Salient JME network findings included: 1) significantly greater intercorrelation of test measures (i.e., increased positive manifold), 2) significantly lower segregation (i.e., normalized average clustering coefficient) but similar network efficiency (i.e., normalized global efficiency), and 3) significantly lower strength of the division of the cognitive modules in the network (i.e., modularity index). Regarding the topographical structure of identified cognitive networks (i.e., their community structure), unaffected siblings and unrelated controls demonstrated three cognitive modules (speed/executive function, perceptual, language) while JME demonstrated two modules—one of which was undifferentiated and “g-like”, and speed/executive function. Overall, JME is associated with less segregation of cognitive subsystems (i.e., modules) indicating less specialization in cognitive processes, abnormalities in the interrelationships of psychometric measures as well as the general configuration of their resulting cognitive networks (fewer in number and atypical in content and structure) which appear to be contributing to their generally poorer cognitive status compared to controls. Unaffected siblings show some penetrance of these atypical network features.</div></div>","PeriodicalId":10758,"journal":{"name":"Cortex","volume":"185 ","pages":"Pages 20-30"},"PeriodicalIF":3.2,"publicationDate":"2025-02-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143395748","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"心理学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Prospective memory and quality of life in older and younger autistic adults
IF 3.2 2区 心理学 Q1 BEHAVIORAL SCIENCES Pub Date : 2025-02-03 DOI: 10.1016/j.cortex.2025.01.006
Amanda Roestorf , Dermot M. Bowler , Sebastian B. Gaigg , Patricia Howlin
Ageing in late adulthood is generally accompanied by diminished prospective memory (PM), which itself is associated with declining quality of life (QoL). Given that autistic individuals are often reported as having PM difficulties and diminished QoL, we aimed to establish whether these measures are also associated in these individuals as they grow older. We administered questionnaire measures of prospective and retrospective memory (PM and RM) and of overall and health-related quality of life (QoL) and experimental measures of time-based and event-based PM (TBPM and EBPM) to 35 autistic and 22 non-autistic adults aged from 23 to 80 years. The autistic participants reported higher levels of PM and RM difficulties than non-autistic participants but that these reports did not correlate with age nor with the experimental TBPM or EBPM measures in either group. Age correlated negatively with two of the experimental measures of TBPM for the non-autistic participants, replicating earlier studies. Autistic participants showed diminished performance on the TBPM but not the EBPM measures, replicating the majority of earlier PM studies in autism. Autistic participants also reported lower overall and health-related QoL, but there were no age-related differences for either measure in either diagnostic group. Self-reported PM and RM correlated significantly with health-related QoL in both the autistic and non-autistic participants. Overall QoL was positively associated with TBPM accuracy in the non-autistic participants. In addition to confirming earlier findings showing that autistic individuals have greater difficulties with TBPM compared to EBPM, our findings suggest that neither EBPM nor TBPM difficulties appear to adversely affect their overall or health-related QoL. The patterning of the autistic participants’ results also suggests that the mechanisms underlying their performance on the tasks used in this study may differ from those of the non-autistic participants, pointing to the need for careful task analysis when designing future investigations.
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引用次数: 0
A taxometric analysis of developmental prosopagnosia: Evidence for a categorically distinct impairment 发展性面孔失认症的分类分析:分类明显损伤的证据。
IF 3.2 2区 心理学 Q1 BEHAVIORAL SCIENCES Pub Date : 2025-02-01 DOI: 10.1016/j.cortex.2024.10.021
Sarah Bate , Emma Portch , Rachel J. Bennetts , Benjamin A. Parris
Poor performance on cognitive assessment tasks may indicate a selective ‘impairment’. However, it is unclear whether such difficulties separate the individual from the general population qualitatively (i.e., they form a discrete group) or quantitatively (i.e., they represent the lower end of a continuous distribution). Taxometric methods address this question but have rarely been applied to cognitive disorders. This study examined the latent structure of developmental prosopagnosia (DP) – a relatively selective deficit in face recognition that occurs in the absence of neurological injury. Multiple taxometric procedures were applied to dominant diagnostic indices of face recognition ability across two independent datasets. All analyses supported a categorical outcome, even for mild cases of DP, suggesting that it is a qualitatively distinct condition. This finding has significant implications for our understanding of DP given it has traditionally been viewed as a continuous impairment. In particular, existing (arbitrary) diagnostic cut-offs may be too conservative, underestimating prevalence rates and prohibiting big-data approaches to theoretical study. More broadly, these conclusions support application of the taxometric method to many other cognitive processes where weaknesses are predominantly assumed to reside on a continuous distribution.
在认知评估任务中表现不佳可能表明有选择性的“损伤”。然而,尚不清楚这些困难是定性地(即,他们形成一个离散的群体)还是定量地(即,他们代表一个连续分布的低端)将个人与总体分开。分类方法解决了这个问题,但很少应用于认知障碍。本研究检测了发展性面孔失认症(DP)的潜在结构,这是一种在没有神经损伤的情况下发生的相对选择性的面部识别缺陷。在两个独立的数据集上,对面部识别能力的主要诊断指标应用了多种分类方法。所有的分析都支持一个分类结果,即使是轻微的DP病例,这表明它是一个定性的不同条件。这一发现对我们理解DP具有重要意义,因为它传统上被认为是一种持续的损害。特别是,现有的(任意的)诊断截止值可能过于保守,低估了患病率,并禁止大数据方法进行理论研究。更广泛地说,这些结论支持将分类方法应用于许多其他认知过程,在这些过程中,弱点主要被认为存在于连续分布中。
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引用次数: 0
Structure–function relationships in the human aging brain: An account of cross-sectional and longitudinal multimodal neuroimaging studies 人类老化大脑的结构-功能关系:横断面和纵向多模态神经成像研究的一个帐户。
IF 3.2 2区 心理学 Q1 BEHAVIORAL SCIENCES Pub Date : 2025-02-01 DOI: 10.1016/j.cortex.2024.12.004
Grégoria Kalpouzos , Jonas Persson
The patterns of brain activation and functional connectivity, task-related and task-free, as a function of age have been well documented over the past 30 years. However, the aging brain undergoes structural changes that are likely to affect the functional properties of the brain. The relationship between brain structure and function started to be investigated more recently. Brain structure and brain function can influence behavioral outcomes independently, and several studies highlight independent contribution of structure and function on cognition. Here, a central assumption is that brain structure also affects behavior indirectly through its influence on brain function. In such a model, structure supports function. Although findings generally suggest that structure may indeed influence function, the direction of the associations, the variability in terms of regional effects and age windows when associations are observed vary greatly. Also, a certain number of studies highlight the independent contribution of structure and function on cognition. A critical aspect of studying aging is the necessity of longitudinal designs, allowing to observe true aging effects – as compared with age differences in cross-sectional designs. This review aims to give an updated account on research dealing with multimodal neuroimaging in aging, and more specifically on the links between structure and function and associated cognitive outcomes, putting in parallel findings from cross-sectional and longitudinal studies. Additionally, we discuss potential mechanisms by which age-related changes in structure may affect function, but also factors (sample characteristics, methodology) that may contribute to the heterogeneity of the findings and the lack of consensus on the associations between structure, function, cognition and aging.
在过去的30年里,大脑激活和功能连接的模式,任务相关和无任务,作为年龄的函数已经得到了很好的记录。然而,老化的大脑会经历结构变化,这可能会影响大脑的功能特性。最近,人们开始研究大脑结构和功能之间的关系。脑结构和脑功能可以独立影响行为结果,一些研究强调了脑结构和脑功能对认知的独立贡献。在这里,一个中心假设是,大脑结构也通过对大脑功能的影响间接影响行为。在这种模型中,结构支持功能。虽然研究结果普遍表明,结构确实可能影响功能,但关联的方向、区域效应方面的可变性和观察到关联时的年龄窗口差异很大。同时,也有一些研究强调了结构和功能对认知的独立贡献。研究老化的一个关键方面是纵向设计的必要性,允许观察真实的老化效应-与横断面设计的年龄差异相比。这篇综述的目的是对多模态神经成像在衰老中的研究进行更新,更具体地说,是关于结构和功能之间的联系以及相关的认知结果,并将横断面和纵向研究的平行发现放在一起。此外,我们还讨论了与年龄相关的结构变化可能影响功能的潜在机制,以及可能导致研究结果异质性和对结构、功能、认知和衰老之间的关联缺乏共识的因素(样本特征、方法)。
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引用次数: 0
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