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Verty LV, Mellah S, Maltezos S, Boujut A, Lussier M, Bherer L, Belleville S. Youth-like brain activation linked with greater cognitive training gains in older adults: Insights from the ACTOP study. Cortex 2024; 176:221-233. [PMID: 38805784 DOI: 10.1016/j.cortex.2024.04.013] [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] [Received: 11/24/2023] [Revised: 03/07/2024] [Accepted: 04/23/2024] [Indexed: 05/30/2024]
Abstract
This study investigates the relationship between inter-individual neurofunctional differences in older adults and cognitive training efficacy, with a specific focus on the association between youth-like task-related brain activation and improvements in working memory (WM) training. The data is part of the Attentional Control Training for Older People (ACTOP) study, 30 older adults completed 12 half-hour WM training sessions. The WM performance slope, assessed at the conclusion of sessions 1 through 6 and sessions 7 to 12, determined early- and late-stage training gains, respectively. Transfer measures were taken before (PRE), midway (MID), and after (POST) training, and the differences in MID-PRE and POST-MID on transfer tasks were used to determine early- and late-stage transfer effects, respectively. The Goodness of Fit (GOF) metric was used to quantify the similarity between each older adult's activation pattern, as measured with functional magnetic resonance imaging (fMRI), to that of a group of younger adults. GOF scores were calculated for activation during low-load (1-0back) and high-load (2-0back) N-back tasks. The results indicated that larger GOF scores in the low-load condition were associated with greater training gains in both the early and late learning stages, and that larger GOF scores in the high-load condition were associated with greater training gains during the late-stage. These findings suggest that a youth-like brain activation pattern in older adults is associated with greater cognitive training benefits, underscoring the role of inter-individual neurofunctional differences to account for variations in training outcomes among older adults. TRIAL REGISTRATION: ClinicalTrials.gov NCT03532113; https://clinicaltrials.gov/ct2/show/NCT03532113.
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Affiliation(s)
- Lynn Valeyry Verty
- Research Center, Institut Universitaire de gériatrie de Montréal, Montreal, QC, Canada; Department of Psychology, Université de Montréal, Montreal, QC, Canada
| | - Samira Mellah
- Research Center, Institut Universitaire de gériatrie de Montréal, Montreal, QC, Canada
| | - Samantha Maltezos
- Research Center, Institut Universitaire de gériatrie de Montréal, Montreal, QC, Canada; Department of Psychology, Université de Montréal, Montreal, QC, Canada
| | - Arnaud Boujut
- Research Center, Institut Universitaire de gériatrie de Montréal, Montreal, QC, Canada; Université de Limoges, HAVAE - UR20217, Limoges, France; 3iL Ingénieurs, Limoges, France
| | - Maxime Lussier
- Research Center, Institut Universitaire de gériatrie de Montréal, Montreal, QC, Canada; Faculty of Medicine, Université de Montréal, Montreal, QC, Canada
| | - Louis Bherer
- Research Center, Institut Universitaire de gériatrie de Montréal, Montreal, QC, Canada; Faculty of Medicine, Université de Montréal, Montreal, QC, Canada; Montreal Heart Institute, Montreal, QC, Canada
| | - Sylvie Belleville
- Research Center, Institut Universitaire de gériatrie de Montréal, Montreal, QC, Canada; Department of Psychology, Université de Montréal, Montreal, QC, Canada; Faculty of Medicine, Université de Montréal, Montreal, QC, Canada.
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2
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Pupillo F, Düzel S, Kühn S, Lindenberger U, Shing YL. Deficits in memory metacognitive efficiency in late adulthood are related to distinct brain profile. Memory 2024:1-17. [PMID: 38635864 DOI: 10.1080/09658211.2024.2341711] [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: 08/16/2023] [Accepted: 04/03/2024] [Indexed: 04/20/2024]
Abstract
The tendency of falsely remembering events that did not happen in the past increases with age. This is particularly evident in cases in which features presented at study are re-presented at test in a recombined constellation (termed rearranged pairs). Interestingly, older adults also express high confidence in such false memories, a tendency that may indicate reduced metacognitive efficiency. Within an existing cohort study, we aimed at investigating age-related differences in memory metacognitive efficiency (as measured by meta d' ratio) in a sample of 1522 older adults and 397 young adults. The analysis showed an age-related deficit in metacognition which was more pronounced for rearranged pairs than for new pairs. We then explored associations between cortical thickness and memory metacognitive efficiency for rearranged pairs in a subsample of 231 older adults. By using partial least square analysis, we found that a multivariate profile composed by ventromedial prefrontal cortex, insula, and parahippocampal cortex was uniquely associated with between-person differences in memory metacognitive efficiency. These results suggest that the impairment in memory metacognitive efficiency for false alarms is a distinct age-related deficit, above and beyond a general age-related decline in memory discrimination, and that it is associated with brain regions involved in metacognitive processes.
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Affiliation(s)
- Francesco Pupillo
- Department of Psychology, Goethe University Frankfurt, Frankfurt am Main, Germany
- TS Social and Behavioural Sciences, Tilburg University, Tilburg, Netherlands
| | - Sandra Düzel
- Friede Springer Cardiovascular Prevention Center @Charité, Berlin, Germany
| | - Simone Kühn
- Max Planck UCL Centre for Computational Psychiatry and Ageing Research, Berlin, German
- Lise-Meitner Group for Environmental Neuroscience, Max Planck Institute for Human Development, Berlin, Germany
| | - Ulman Lindenberger
- Max Planck UCL Centre for Computational Psychiatry and Ageing Research, Berlin, German
- Center for Lifespan Psychology, Max Planck Institute for Human Development, Berlin, Germany
| | - Yee Lee Shing
- Department of Psychology, Goethe University Frankfurt, Frankfurt am Main, Germany
- IDeA Center for Individual Development and Adaptive Education, Frankfurt am Main, Germany
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3
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Dimanova P, Borbás R, Raschle NM. From mother to child: How intergenerational transfer is reflected in similarity of corticolimbic brain structure and mental health. Dev Cogn Neurosci 2023; 64:101324. [PMID: 37979300 PMCID: PMC10692656 DOI: 10.1016/j.dcn.2023.101324] [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] [Received: 05/24/2023] [Revised: 10/31/2023] [Accepted: 11/10/2023] [Indexed: 11/20/2023] Open
Abstract
BACKGROUND Intergenerational transfer effects include traits transmission from parent to child. While behaviorally well documented, studies on intergenerational transfer effects for brain structure or functioning are scarce, especially those examining relations of behavioral and neurobiological endophenotypes. This study aims to investigate behavioral and neural intergenerational transfer effects associated with the corticolimbic circuitry, relevant for socioemotional functioning and mental well-being. METHODS T1-neuroimaging and behavioral data was obtained from 72 participants (39 mother-child dyads/ 39 children; 7-13 years; 16 girls/ 33 mothers; 26-52 years). Gray matter volume (GMV) was extracted from corticolimbic regions (subcortical: amygdala, hippocampus, nucleus accumbens; neocortical: anterior cingulate, medial orbitofrontal areas). Mother-child similarity was quantified by correlation coefficients and comparisons to random adult-child pairs. RESULTS We identified significant corticolimbic mother-child similarity (r = 0.663) stronger for subcortical over neocortical regions. Mother-child similarity in mental well-being was significant (r = 0.409) and the degree of dyadic similarity in mental well-being was predicted by similarity in neocortical, but not subcortical GMV. CONCLUSION Intergenerational neuroimaging reveals significant mother-child transfer for corticolimbic GMV, most strongly for subcortical regions. However, variations in neocortical similarity predicted similarity in mother-child well-being. Ultimately, such techniques may enhance our knowledge of behavioral and neural familial transfer effects relevant for health and disease.
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Affiliation(s)
- Plamina Dimanova
- Jacobs Center for Productive Youth Development, University of Zurich, Zurich, Switzerland; Neuroscience Center Zurich, University and ETH Zurich, Zurich, Switzerland.
| | - Réka Borbás
- Jacobs Center for Productive Youth Development, University of Zurich, Zurich, Switzerland
| | - Nora Maria Raschle
- Jacobs Center for Productive Youth Development, University of Zurich, Zurich, Switzerland; Neuroscience Center Zurich, University and ETH Zurich, Zurich, Switzerland.
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4
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Guardia T, Mazloum-Farzaghi N, Olsen RK, Tsvetanov KA, Campbell KL. Associative memory is more strongly predicted by age-related differences in the prefrontal cortex than medial temporal lobes. NEUROIMAGE: REPORTS 2023. [DOI: 10.1016/j.ynirp.2023.100168] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 03/29/2023]
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5
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Schwarze SA, Laube C, Khosravani N, Lindenberger U, Bunge SA, Fandakova Y. Does prefrontal connectivity during task switching help or hinder children's performance? Dev Cogn Neurosci 2023; 60:101217. [PMID: 36807013 PMCID: PMC9969289 DOI: 10.1016/j.dcn.2023.101217] [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: 09/30/2022] [Revised: 01/12/2023] [Accepted: 02/14/2023] [Indexed: 02/17/2023] Open
Abstract
The ability to flexibly switch between tasks is key for goal-directed behavior and continues to improve across childhood. Children's task switching difficulties are thought to reflect less efficient engagement of sustained and transient control processes, resulting in lower performance on blocks that intermix tasks (sustained demand) and trials that require a task switch (transient demand). Sustained and transient control processes are associated with frontoparietal regions, which develop throughout childhood and may contribute to task switching development. We examined age differences in the modulation of frontoparietal regions by sustained and transient control demands in children (8-11 years) and adults. Children showed greater performance costs than adults, especially under sustained demand, along with less upregulation of sustained and transient control activation in frontoparietal regions. Compared to adults, children showed increased connectivity between the inferior frontal junction (IFJ) and lateral prefrontal cortex (lPFC) from single to mixed blocks. For children whose sustained activation was less adult-like, increased IFJ-lPFC connectivity was associated with better performance. Children with more adult-like sustained activation showed the inverse effect. These results suggest that individual differences in task switching in later childhood at least partly depend on the recruitment of frontoparietal regions in an adult-like manner.
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Affiliation(s)
- Sina A. Schwarze
- Center for Lifespan Psychology, Max Planck Institute for Human Development, Lentzeallee 94, 14195 Berlin, Germany,Correspondence to: Max Planck Institute for Human Development, Lentzeallee 94, 14195 Berlin, Germany.
| | - Corinna Laube
- Center for Lifespan Psychology, Max Planck Institute for Human Development, Lentzeallee 94, 14195 Berlin, Germany,Fresenius University of Applied Sciences, Jägerstraße 32, 10117 Berlin, Germany
| | - Neda Khosravani
- Center for Lifespan Psychology, Max Planck Institute for Human Development, Lentzeallee 94, 14195 Berlin, Germany
| | - Ulman Lindenberger
- Center for Lifespan Psychology, Max Planck Institute for Human Development, Lentzeallee 94, 14195 Berlin, Germany,Max Planck UCL Centre for Computational Psychiatry and Ageing Research, Lentzeallee 94, 14195 Berlin, Germany,Max Planck UCL Centre for Computational Psychiatry and Ageing Research, 10-12 Russell Square, WC1B 5EH London, UK
| | - Silvia A. Bunge
- Department of Psychology and Helen Wills Neuroscience Institute, University of California at Berkeley, 2121 Berkeley Way, Berkeley, CA 94720-1650, USA
| | - Yana Fandakova
- Center for Lifespan Psychology, Max Planck Institute for Human Development, Lentzeallee 94, 14195 Berlin, Germany
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6
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Cansino S. Brain connectivity changes associated with episodic recollection decline in aging: A review of fMRI studies. Front Aging Neurosci 2022; 14:1012870. [PMID: 36389073 PMCID: PMC9640923 DOI: 10.3389/fnagi.2022.1012870] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2022] [Accepted: 09/28/2022] [Indexed: 12/03/2022] Open
Abstract
With advancing age, individuals experience a gradual decline in recollection, the ability to retrieve personal experiences accompanied by details, such as temporal and spatial contextual information. Numerous studies have identified several brain regions that exhibit age-related activation differences during recollection tasks. More recently, an increasing number of studies have provided evidence regarding how brain connectivity among the regions supporting recollection contributes to the explanation of recollection deficits in aging. However, brain connectivity evidence has not been examined jointly to provide an integrative view of how these new findings have improved our knowledge of the neurofunctional changes underlying the recollection deficits associated with aging. Therefore, the aim of the present study was to examine functional magnetic resonance imaging (fMRI) studies that employed one of the numerous methods available for analyzing brain connectivity in older adults. Only studies that applied connectivity analysis to data recorded during episodic recollection tasks, either during encoding or retrieval, were assessed. First, the different brain connectivity analysis methods and the information conveyed were briefly described. Then, the brain connectivity findings from the different studies were described and discussed to provide an integrative point of view of how these findings explain the decline in recollection associated with aging. The studies reviewed provide evidence that the hippocampus consistently decreased its connectivity with the parahippocampal gyrus and the posterior cingulate cortex, essential regions of the recollection network, in older adults relative to young adults. In addition, older adults exhibited increased connectivity between the hippocampus and several widespread regions compared to young adults. The increased connectivity was interpreted as brain intensification recourse to overcome recollection decay. Additionally, suggestions for future research in the field are outlined.
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7
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Age-related differences in encoding-retrieval similarity and their relationship to false memory. Neurobiol Aging 2022; 113:15-27. [DOI: 10.1016/j.neurobiolaging.2022.01.011] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2021] [Revised: 01/28/2022] [Accepted: 01/31/2022] [Indexed: 12/26/2022]
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8
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Grande X, Berron D, Maass A, Bainbridge WA, Düzel E. Content-specific vulnerability of recent episodic memories in Alzheimer's disease. Neuropsychologia 2021; 160:107976. [PMID: 34314781 PMCID: PMC8434425 DOI: 10.1016/j.neuropsychologia.2021.107976] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2021] [Revised: 07/21/2021] [Accepted: 07/22/2021] [Indexed: 11/21/2022]
Abstract
Endel Tulving's episodic memory framework emphasizes the multifaceted re-experiencing of personal events. Indeed, decades of research focused on the experiential nature of episodic memories, usually treating recent episodic memory as a coherent experiential quality. However, recent insights into the functional architecture of the medial temporal lobe show that different types of mnemonic information are segregated into distinct neural pathways in brain circuits empirically associated with episodic memory. Moreover, recent memories do not fade as a whole under conditions of progressive neurodegeneration in these brain circuits, notably in Alzheimer's disease. Instead, certain memory content seem particularly vulnerable from the moment of their encoding while other content can remain memorable consistently across individuals and contexts. We propose that these observations are related to the content-specific functional architecture of the medial temporal lobe and consequently to a content-specific impairment of memory at different stages of the neurodegeneration. To develop Endel Tulving's inspirational legacy further and to advance our understanding of how memory function is affected by neurodegenerative conditions such as Alzheimer's disease, we postulate that it is compelling to focus on the representational content of recent episodic memories. The functional anatomy of episodic memory segregates different memory content. Alzheimer's disease may cause content-specific loss of recent memories Content-specific memorability across individuals changes with Alzheimer's disease. Content-specific assessment could provide new insights into episodic memory in health and disease
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Affiliation(s)
- Xenia Grande
- German Center for Neurodegenerative Diseases, Magdeburg, Germany; Institute of Cognitive Neurology and Dementia Research, Otto von Guericke University Magdeburg, Germany.
| | - David Berron
- German Center for Neurodegenerative Diseases, Magdeburg, Germany; Clinical Memory Research Unit, Department of Clinical Sciences Malmö, Lund University, Lund, Sweden
| | - Anne Maass
- German Center for Neurodegenerative Diseases, Magdeburg, Germany
| | | | - Emrah Düzel
- German Center for Neurodegenerative Diseases, Magdeburg, Germany; Institute of Cognitive Neurology and Dementia Research, Otto von Guericke University Magdeburg, Germany; Institute of Cognitive Neuroscience, University College London, United Kingdom.
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9
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Sikora-Wachowicz B, Keresztes A, Werkle-Bergner M, Lewandowska K, Marek T, Fafrowicz M. False recognitions in short-term memory - Age-differences in neural activity. Brain Cogn 2021; 151:105728. [PMID: 33882403 DOI: 10.1016/j.bandc.2021.105728] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2020] [Revised: 03/14/2021] [Accepted: 04/02/2021] [Indexed: 12/15/2022]
Abstract
While the knowledge on age-related differences in susceptibility to episodic false memories is extensive, little is known about this phenomenon in visual short-term memory (STM). Our previous behavioural research indicated that older adults are more confident of their erroneous STM recognitions than young adults. However, unlike in episodic memory, we did not find support for older adults' higher rate of false alarms. To further understand this specific age-difference, here we investigated its neural correlates. First, the pattern of behavioural results replicated the one from our previous experiment. Second, younger adults, when compared to older adults, exhibited higher false recognition-related activity of the visual cortex, the anterior cingulate cortex, the frontal operculum/insular cortex as well as regions within the anterior and dorsolateral prefrontal cortex. No age-differences were observed in hippocampal activity. Third, younger but not older adults presented higher activity in the anterior cingulate cortex and the frontal operculum/insular cortex for false recognitions when compared to highly confident correct rejections. Finally, frontal activity was influenced by both the individuals' performance and their metacognitive abilities. The results suggest that age-related differences in confidence of STM false recognitions may arise from age-differences in performance monitoring and uncertainty processing rather than in hippocampal-mediated binding.
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Affiliation(s)
- B Sikora-Wachowicz
- Department of Cognitive Neuroscience and Neuroergonomics, Institute of Applied Psychology, Jagiellonian University, Łojasiewicza Street 4, 30-348 Krakow, Poland.
| | - A Keresztes
- Brain Imaging Centre, Research Centre for Natural Sciences, Magyar Tudósok Körútja 2, 1117 Budapest, Hungary; Center for Lifespan Psychology, Max Planck Institute for Human Development, Lentzeallee 94, 14195 Berlin, Germany; Faculty of Education and Psychology, Eötvös Loránd University, Kazinczy u. 23-27, 1075 Budapest, Hungary
| | - M Werkle-Bergner
- Center for Lifespan Psychology, Max Planck Institute for Human Development, Lentzeallee 94, 14195 Berlin, Germany
| | - K Lewandowska
- Department of Cognitive Neuroscience and Neuroergonomics, Institute of Applied Psychology, Jagiellonian University, Łojasiewicza Street 4, 30-348 Krakow, Poland
| | - T Marek
- Department of Cognitive Neuroscience and Neuroergonomics, Institute of Applied Psychology, Jagiellonian University, Łojasiewicza Street 4, 30-348 Krakow, Poland
| | - M Fafrowicz
- Department of Cognitive Neuroscience and Neuroergonomics, Institute of Applied Psychology, Jagiellonian University, Łojasiewicza Street 4, 30-348 Krakow, Poland; Malopolska Centre of Biotechnology, Jagiellonian University, Gronostajowa 7A, 30-387 Krakow, Poland
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10
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Garzón B, Lövdén M, de Boer L, Axelsson J, Riklund K, Bäckman L, Nyberg L, Guitart-Masip M. Role of dopamine and gray matter density in aging effects and individual differences of functional connectomes. Brain Struct Funct 2021; 226:743-758. [PMID: 33423111 PMCID: PMC7981334 DOI: 10.1007/s00429-020-02205-4] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2020] [Accepted: 12/16/2020] [Indexed: 12/01/2022]
Abstract
With increasing age, functional connectomes become dissimilar across normal individuals, reflecting heterogenous aging effects on functional connectivity (FC). We investigated the distribution of these effects across the connectome and their relationship with age-related differences in dopamine (DA) D1 receptor availability and gray matter density (GMD). With this aim, we determined aging effects on mean and interindividual variance of FC using fMRI in 30 younger and 30 older healthy subjects and mapped the contribution of each connection to the patterns of age-related similarity loss. Aging effects on mean FC accounted mainly for the dissimilarity between connectomes of younger and older adults, and were related, across brain regions, to aging effects on DA D1 receptor availability. Aging effects on the variance of FC indicated a global increase in variance with advancing age, explained connectome dissimilarity among older subjects and were related to aging effects on variance of GMD. The relationship between aging and the similarity of connectomes can thus be partly explained by age differences in DA modulation and gray matter structure.
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Affiliation(s)
- Benjamín Garzón
- Aging Research Center, Karolinska Institutet, Stockholm, Sweden. .,Aging Research Center, Tomtebodavägen 18A, 171 65, Solna, Sweden.
| | - Martin Lövdén
- Aging Research Center, Karolinska Institutet, Stockholm, Sweden
| | - Lieke de Boer
- Aging Research Center, Karolinska Institutet, Stockholm, Sweden
| | - Jan Axelsson
- Department of Radiation Sciences, Umeå University, Umeå, Sweden.,Umeå Center for Functional Brain Imaging, Umeå University, Umeå, Sweden
| | - Katrine Riklund
- Department of Radiation Sciences, Umeå University, Umeå, Sweden.,Umeå Center for Functional Brain Imaging, Umeå University, Umeå, Sweden
| | - Lars Bäckman
- Aging Research Center, Karolinska Institutet, Stockholm, Sweden
| | - Lars Nyberg
- Department of Radiation Sciences, Umeå University, Umeå, Sweden.,Umeå Center for Functional Brain Imaging, Umeå University, Umeå, Sweden.,Department of Integrative Medical Biology, Umeå University, Umeå, Sweden
| | - Marc Guitart-Masip
- Aging Research Center, Karolinska Institutet, Stockholm, Sweden.,Max Planck UCL Centre for Computational Psychiatry and Ageing Research, University College London, London, UK
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11
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McLachlan E, Rai S, Al-Shihabi A, Huntley J, Burgess N, Howard R, Reeves S. Neuroimaging correlates of false memory in 'Alzheimer's disease: A preliminary systematic review. Psychiatry Res Neuroimaging 2020; 296:111021. [PMID: 31887712 DOI: 10.1016/j.pscychresns.2019.111021] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/17/2019] [Revised: 10/28/2019] [Accepted: 12/06/2019] [Indexed: 12/21/2022]
Abstract
Alzheimer's disease (AD) is characterised by episodic memory impairment, but people also experience memory distortions, including false memories, which can impact on safety and reduce functioning. Understanding the neural networks that underpin false memories could help to predict the need for intervention and guide development of cognitive strategies to reduce memory errors. However, there is a relative absence of research into how the neuropathology of AD contributes to false memory generation. This paper systematically reviews the methodology and outcomes of studies investigating the neuroimaging correlates of false memory in AD. Four studies using structural imaging and three studies using functional imaging were identified. Studies were heterogenous in methodology and received mostly 'weak' quality assessment ratings. Combined, and consistent with neuroimaging findings in non-AD populations, results from identified studies provide preliminary support for the hypothesis that medial temporal lobe and prefrontal cortex dysfunction may lead to generation of false memories in AD. However, the small number of studies and significant heterogeneity within them means further study is necessary to assess replicability of results.
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Affiliation(s)
- Emma McLachlan
- Division of Psychiatry, University College London, Maple House, 149 Tottenham Court Rd, London, United Kingdom, W1T 7NF.
| | - Salina Rai
- Division of Psychiatry, University College London, Maple House, 149 Tottenham Court Rd, London, United Kingdom, W1T 7NF
| | - Ahmed Al-Shihabi
- Division of Psychiatry, University College London, Maple House, 149 Tottenham Court Rd, London, United Kingdom, W1T 7NF
| | - Jonathan Huntley
- Division of Psychiatry, University College London, Maple House, 149 Tottenham Court Rd, London, United Kingdom, W1T 7NF
| | - Neil Burgess
- Institute of Cognitive Neuroscience, University College London, Alexandra House, 17-19 Queen Square, Bloomsbury, London, United Kingdom, WC1N 3AZ
| | - Robert Howard
- Division of Psychiatry, University College London, Maple House, 149 Tottenham Court Rd, London, United Kingdom, W1T 7NF
| | - Suzanne Reeves
- Division of Psychiatry, University College London, Maple House, 149 Tottenham Court Rd, London, United Kingdom, W1T 7NF
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12
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Sander MC, Fandakova Y, Grandy TH, Shing YL, Werkle-Bergner M. Oscillatory Mechanisms of Successful Memory Formation in Younger and Older Adults Are Related to Structural Integrity. Cereb Cortex 2020; 30:3744-3758. [PMID: 31989153 PMCID: PMC7232990 DOI: 10.1093/cercor/bhz339] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2019] [Revised: 11/01/2019] [Indexed: 01/21/2023] Open
Abstract
We studied oscillatory mechanisms of memory formation in 48 younger and 51 older adults in an intentional associative memory task with cued recall. While older adults showed lower memory performance than young adults, we found subsequent memory effects (SME) in alpha/beta and theta frequency bands in both age groups. Using logistic mixed effects models, we investigated whether interindividual differences in structural integrity of key memory regions could account for interindividual differences in the strength of the SME. Structural integrity of inferior frontal gyrus (IFG) and hippocampus was reduced in older adults. SME in the alpha/beta band were modulated by the cortical thickness of IFG, in line with its hypothesized role for deep semantic elaboration. Importantly, this structure–function relationship did not differ by age group. However, older adults were more frequently represented among the participants with low cortical thickness and consequently weaker SME in the alpha band. Thus, our results suggest that differences in the structural integrity of the IFG contribute not only to interindividual, but also to age differences in memory formation.
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Affiliation(s)
- Myriam C Sander
- Center for Lifespan Psychology, Max Planck Institute for Human Development, Berlin 14195, Germany
| | - Yana Fandakova
- Center for Lifespan Psychology, Max Planck Institute for Human Development, Berlin 14195, Germany
| | - Thomas H Grandy
- Center for Lifespan Psychology, Max Planck Institute for Human Development, Berlin 14195, Germany
| | - Yee Lee Shing
- Center for Lifespan Psychology, Max Planck Institute for Human Development, Berlin 14195, Germany.,Department of Developmental Psychology, Goethe University Frankfurt, Frankfurt am Main 60323, Germany
| | - Markus Werkle-Bergner
- Center for Lifespan Psychology, Max Planck Institute for Human Development, Berlin 14195, Germany
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13
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Zuo N, Salami A, Liu H, Yang Z, Jiang T. Functional maintenance in the multiple demand network characterizes superior fluid intelligence in aging. Neurobiol Aging 2020; 85:145-153. [DOI: 10.1016/j.neurobiolaging.2019.09.006] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2019] [Revised: 08/20/2019] [Accepted: 09/14/2019] [Indexed: 12/13/2022]
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14
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Brehmer Y, Nilsson J, Berggren R, Schmiedek F, Lövdén M. The importance of the ventromedial prefrontal cortex for associative memory in older adults: A latent structural equation analysis. Neuroimage 2019; 209:116475. [PMID: 31877373 DOI: 10.1016/j.neuroimage.2019.116475] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2019] [Revised: 12/11/2019] [Accepted: 12/18/2019] [Indexed: 10/25/2022] Open
Abstract
Older adults show relatively minor age-related decline in memory for single items, while their memory for associations is markedly reduced. Inter-individual differences in memory function in older adults are substantial but the neurobiological underpinnings of such differences are not well understood. In particular, the relative importance of inter-individual differences in the medio-temporal lobe (MTL) and the lateral prefrontal cortex (PFC) for associative and item recognition in older adults is still ambiguous. We therefore aimed to first establish the distinction between inter-individual differences in associative memory (recollection-based) performance and item memory (familiarity-based) performance in older adults and subsequently link these two constructs to differences in cortical thickness in the MTL and lateral PFC regions, in a latent structural equation modelling framework. To this end, a sample of 160 older adults (65-75 years old) performed three intentional item-associative memory tasks, of which a subsample (n = 72) additionally had cortical thickness measures in MTL and PFC regions of interest available. The results provided support for a distinction between familiarity-based item memory and recollection-based associative memory performance in older adults. Cortical thickness in the ventro-medial prefrontal cortex was positively correlated with associative recognition performance, above and beyond any relationship between item recognition performance and cortical thickness in the same region and between associative recognition performance and brain structure in the MTL (parahippocampus). The findings highlight the relative importance of the ventromedial prefrontal cortex in allowing for intentional recollection-based associative memory functioning in older adults.
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Affiliation(s)
- Yvonne Brehmer
- Aging Research Center, Karolinska Institutet and Stockholm University, Stockholm, Sweden; Department of Developmental Psychology, Tilburg University, Tilburg, the Netherlands.
| | - Jonna Nilsson
- Aging Research Center, Karolinska Institutet and Stockholm University, Stockholm, Sweden.
| | - Rasmus Berggren
- Aging Research Center, Karolinska Institutet and Stockholm University, Stockholm, Sweden
| | - Florian Schmiedek
- Department for Education and Human Development, DIPF
- Leibniz Institute for Research and Information in Education, Frankfurt am Main, Germany
| | - Martin Lövdén
- Aging Research Center, Karolinska Institutet and Stockholm University, Stockholm, Sweden
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15
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Sejunaite K, Lanza C, Riepe MW. Everyday Memory in Healthy Aging: Porous but Not Distorted. Front Aging Neurosci 2019; 11:153. [PMID: 31293413 PMCID: PMC6604723 DOI: 10.3389/fnagi.2019.00153] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2018] [Accepted: 06/11/2019] [Indexed: 01/10/2023] Open
Abstract
Most studies targeting age-association of memory functions report a decline in recognition hits and an increase in false alarms. The goal of the present study was to assess these findings in tasks with day-to-day relevance. We investigated healthy young (YA; age 26.90 ± 3.55 years) and old (OA; age 69.80 ± 5.85 years) adults. Participants were asked to watch six news and six commercials and complete a recognition task relating to the information presented in the videos. OA had a lower hit rate in both news and commercials compared to YA. However, the number of false alarms (FA) was the same in both age groups. Applying signal detection theory, we found age differences in discriminability for both news and commercials paradigm. The groups showed no differences in bias and both chose a liberal answering tendency. We interpret our finding as a result of complex recognition items in an ecologically valid task. Multi-feature items offer an advantage in correct rejection—it is enough to know that at least one feature of an item is false. This benefit does not extend to hits, where all features of an item need to be recognized. This indicates that recognition memory of naturalistic stimuli in OA is porous, but not distorted.
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Affiliation(s)
- Karolina Sejunaite
- Department of Psychiatry and Psychotherapy II, Division of Mental Health & Old Age Psychiatry, University of Ulm, Ulm, Germany
| | - Claudia Lanza
- Department of Psychiatry and Psychotherapy II, Division of Mental Health & Old Age Psychiatry, University of Ulm, Ulm, Germany
| | - Matthias W Riepe
- Department of Psychiatry and Psychotherapy II, Division of Mental Health & Old Age Psychiatry, University of Ulm, Ulm, Germany
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16
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Muehlroth BE, Sander MC, Fandakova Y, Grandy TH, Rasch B, Shing YL, Werkle-Bergner M. Precise Slow Oscillation-Spindle Coupling Promotes Memory Consolidation in Younger and Older Adults. Sci Rep 2019; 9:1940. [PMID: 30760741 PMCID: PMC6374430 DOI: 10.1038/s41598-018-36557-z] [Citation(s) in RCA: 114] [Impact Index Per Article: 22.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2018] [Accepted: 11/25/2018] [Indexed: 01/17/2023] Open
Abstract
Memory consolidation during sleep relies on the precisely timed interaction of rhythmic neural events. Here, we investigate differences in slow oscillations (SO; 0.5-1 Hz), sleep spindles (SP), and their coupling across the adult human lifespan and ask whether observed alterations relate to the ability to retain associative memories across sleep. We demonstrate that older adults do not show the fine-tuned coupling of fast SPs (12.5-16 Hz) to the SO peak present in younger adults but, instead, are characterized most by a slow SP power increase (9-12.5 Hz) at the end of the SO up-state. This slow SP power increase, typical for older adults, coincides with worse memory consolidation in young age already, whereas the tight precision of SO-fast SP coupling promotes memory consolidation across younger and older adults. Crucially, brain integrity in source regions of SO and SP generation, including the medial prefrontal cortex, thalamus, hippocampus and entorhinal cortex, reinforces this beneficial SO-SP coupling in old age. Our results reveal that cognitive functioning is not only determined by maintaining structural brain integrity across the adult lifespan, but also by the preservation of precisely timed neural interactions during sleep that enable the consolidation of declarative memories.
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Affiliation(s)
- Beate E Muehlroth
- Center for Lifespan Psychology, Max Planck Institute for Human Development, Berlin, Germany.
| | - Myriam C Sander
- Center for Lifespan Psychology, Max Planck Institute for Human Development, Berlin, Germany
| | - Yana Fandakova
- Center for Lifespan Psychology, Max Planck Institute for Human Development, Berlin, Germany
| | - Thomas H Grandy
- Center for Lifespan Psychology, Max Planck Institute for Human Development, Berlin, Germany
| | - Björn Rasch
- Department of Psychology, University of Fribourg, Fribourg, Switzerland
| | - Yee Lee Shing
- Center for Lifespan Psychology, Max Planck Institute for Human Development, Berlin, Germany
- Department of Developmental Psychology, Goethe University Frankfurt, Frankfurt am Main, Germany
| | - Markus Werkle-Bergner
- Center for Lifespan Psychology, Max Planck Institute for Human Development, Berlin, Germany.
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17
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McDonald AP, D'Arcy RCN, Song X. Functional MRI on executive functioning in aging and dementia: A scoping review of cognitive tasks. Aging Med (Milton) 2018; 1:209-219. [PMID: 31942499 PMCID: PMC6880681 DOI: 10.1002/agm2.12037] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2018] [Accepted: 08/14/2018] [Indexed: 12/23/2022] Open
Abstract
Cognitive decline with aging and dementia is especially poignant with regard to the executive functioning that is necessary for activities of daily independent living. The relationship between age-related neurodegeneration in the prefrontal cortex and executive functioning has been uniquely investigated using task-phase functional magnetic resonance imaging (fMRI) to detect brain activity in response to stimuli; however, a comprehensive list of task designs that have been implemented to task-phase fMRI is absent in the literature. The purpose of this review was to recognize what methods have been used to study executive functions with aging and dementia in fMRI tasks, and to describe and categorize them. The following cognitive subdomains were emphasized: cognitive flexibility, planning and decision-making, working memory, cognitive control/inhibition, semantic processing, attention and concentration, emotional functioning, and multitasking. Over 30 different task-phase fMRI designs were found to have been implemented in the literature, all adopted from standard neuropsychological assessments. Cognitive set-shifting and decision-making tasks were particularly well studied in regard to age-related neurodegeneration, while emotional functioning and multitasking designs were found to be the least utilized. Summarizing the information on which tasks have shown the greatest usability will assist in the future design and implementation of effective fMRI experiments targeting executive functioning.
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Affiliation(s)
- Andrew P. McDonald
- Health Sciences and InnovationFraser Health AuthoritySurreyBritish ColumbiaCanada
- Department of MedicineUniversity of British ColumbiaVancouverBritish ColumbiaCanada
| | - Ryan C. N. D'Arcy
- Health Sciences and InnovationFraser Health AuthoritySurreyBritish ColumbiaCanada
- ImageTech LaboratorySimon Fraser UniversitySurreyBritish ColumbiaCanada
| | - Xiaowei Song
- Health Sciences and InnovationFraser Health AuthoritySurreyBritish ColumbiaCanada
- ImageTech LaboratorySimon Fraser UniversitySurreyBritish ColumbiaCanada
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18
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Vidal-Piñeiro D, Sneve MH, Nyberg LH, Mowinckel AM, Sederevicius D, Walhovd KB, Fjell AM. Maintained Frontal Activity Underlies High Memory Function Over 8 Years in Aging. Cereb Cortex 2018; 29:3111-3123. [DOI: 10.1093/cercor/bhy177] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2018] [Revised: 05/28/2018] [Indexed: 01/17/2023] Open
Abstract
AbstractAging is characterized by substantial average decline in memory performance. Yet contradictory explanations have been given for how the brains of high-performing older adults work: either by engagement of compensatory processes such as recruitment of additional networks or by maintaining young adults’ patterns of activity. Distinguishing these components requires large experimental samples and longitudinal follow-up. Here, we investigate which features are key to high memory in aging, directly testing these hypotheses by studying a large sample of adult participants (n > 300) with fMRI during an episodic memory experiment where item-context relationships were implicitly encoded. The analyses revealed that low levels of activity in frontal networks—known to be involved in memory encoding—were associated with low memory performance in the older adults only. Importantly, older participants with low memory performance and low frontal activity exhibited a strong longitudinal memory decline in an independent verbal episodic memory task spanning 8 years back (n = 52). These participants were also characterized by lower hippocampal volumes and steeper rates of cortical atrophy. Altogether, maintenance of frontal brain function during encoding seems to be a primary characteristic of preservation of memory function in aging, likely reflecting intact ability to integrate information.
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Affiliation(s)
- Didac Vidal-Piñeiro
- Centre for Lifespan Changes in Brain and Cognition, Department of Psychology, University of Oslo, Oslo, Norway
| | - Markus H Sneve
- Centre for Lifespan Changes in Brain and Cognition, Department of Psychology, University of Oslo, Oslo, Norway
| | - Lars H Nyberg
- Umeå Centre for Functional Brain Imaging, Umeå University, Umeå SE-901 87, Sweden
- Department of Integrative Medical Biology, Physiology Section and Department of Radiation Sciences, Diagnostic Radiology, Umeå University, Umeå SE-901 87, Sweden
| | - Athanasia M Mowinckel
- Centre for Lifespan Changes in Brain and Cognition, Department of Psychology, University of Oslo, Oslo, Norway
| | - Donatas Sederevicius
- Centre for Lifespan Changes in Brain and Cognition, Department of Psychology, University of Oslo, Oslo, Norway
| | - Kristine B Walhovd
- Centre for Lifespan Changes in Brain and Cognition, Department of Psychology, University of Oslo, Oslo, Norway
- Department of Radiology and Nuclear Medicine, Oslo University Hospital, Oslo, Norway
| | - Anders M Fjell
- Centre for Lifespan Changes in Brain and Cognition, Department of Psychology, University of Oslo, Oslo, Norway
- Department of Radiology and Nuclear Medicine, Oslo University Hospital, Oslo, Norway
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19
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Sejunaite K, Lanza C, Riepe MW. Everyday Memory in Patients with Alzheimer's Disease: Fragmentary and Distorted. J Alzheimers Dis 2018; 60:1489-1498. [PMID: 29060940 DOI: 10.3233/jad-170493] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
BACKGROUND Errors of omission are an established hallmark of memory impairment in Alzheimer's disease (AD). Much less is known about other memory errors in AD such as false memories. OBJECTIVE We investigated false memories in healthy elderly controls (HC; n = 23) and patients with AD (n = 20) using real-life tasks of watching news and commercials. METHODS Participants received a comprehensive neuropsychological assessment and were shown original news and commercials with a subsequent recognition task to assess veridical and false memories. RESULTS Subjective estimate of the number of errors were alike in HC and patients with AD. However, memory performance in both the news and the commercials task was significantly worse in patients with AD. Trail-Making Test and Symbol-Span Test were significant predictors of false memories on viewing news and commercials. In patients with AD, levels of Aβ1 - 42, but not levels of tau-protein were correlated with false memories in both tasks. CONCLUSIONS Everyday life in patients with AD is impeded not due to the incompleteness of memory but also due to its distortions. Furthermore, it is hindered by the lack of awareness towards these deficits. False memory content in patients with AD is associated with Aβ42 levels in the CSF as a surrogate of the overall extent to which the brain has been affected by AD pathology. Future studies will need to address the impact of this duality of memory failure on everyday life of patients with AD and their proxies in greater detail.
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Affiliation(s)
- Karolina Sejunaite
- Division of Mental Health and Old Age Psychiatry, Psychiatry II, Ulm University, Ulm, Germany
| | - Claudia Lanza
- Division of Mental Health and Old Age Psychiatry, Psychiatry II, Ulm University, Ulm, Germany
| | - Matthias W Riepe
- Division of Mental Health and Old Age Psychiatry, Psychiatry II, Ulm University, Ulm, Germany
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20
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Abstract
Neuroimaging studies of the aging brain provide support that the strongest predictor of preserved memory and cognition in older age is brain maintenance, or relative lack of brain pathology. Evidence for brain maintenance comes from different levels of examination, but up to now relatively few studies have used a longitudinal design. Examining factors that promote brain maintenance in aging is a critical task for the future and may be combined with the use of new techniques for multimodal imaging.
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Affiliation(s)
- Lars Nyberg
- Umeå Center for Functional Brain Imaging (UFBI), Umeå University, Umeå, Sweden.,Department of Integrative Medical Biology, Umeå University, Umeå, Sweden.,Department of Radiation Sciences, Umeå University, Umeå, Sweden
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21
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Zheng Z, Li R, Xiao F, He R, Zhang S, Li J. Sex Matters: Hippocampal Volume Predicts Individual Differences in Associative Memory in Cognitively Normal Older Women but Not Men. Front Hum Neurosci 2017; 11:93. [PMID: 28321185 PMCID: PMC5337694 DOI: 10.3389/fnhum.2017.00093] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2016] [Accepted: 02/15/2017] [Indexed: 11/18/2022] Open
Abstract
The hippocampus plays a prominent role in associative memory by supporting relational binding and recollection processes. Structural atrophy in the hippocampus is likely to induce associative memory deficits in older adults. Previous studies have primarily focused on average age-related differences in hippocampal structure and memory performance. To date, however, it remains unclear whether individual differences in hippocampal morphometry underlie differential associative memory performance, and whether there are sex differences in the structural correlates of associative memory in healthy older adults. Here, we used voxel-based morphometry (VBM) to examine the extent to which gray matter volume (GMV) of the hippocampus predicts associative memory performance in cognitively normal older adults. Seventy-one participants completed a cued recall paired-associative learning test (PALT), which consists of novel associations and semantically related associations, and underwent magnetic resonance imaging (MRI). We observed worse associative memory performance and larger variability for novel associations than for semantically related associations. The VBM results revealed that higher scores on associative memory for novel associations were related to greater hippocampal GMV across all older adults. When considering men and women separately, the correlation between hippocampal GMV and associative memory performance for novel associations reached significance only in older women. These findings suggest that hippocampal structural volumes may predict individual differences in novel associative memory in older women but not men.
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Affiliation(s)
- Zhiwei Zheng
- Center on Aging Psychology, CAS Key Laboratory of Mental Health, Institute of Psychology, Chinese Academy of SciencesBeijing, China; Department of Psychology, University of Chinese Academy of SciencesBeijing, China
| | - Rui Li
- Center on Aging Psychology, CAS Key Laboratory of Mental Health, Institute of Psychology, Chinese Academy of SciencesBeijing, China; Department of Psychology, University of Chinese Academy of SciencesBeijing, China; Magnetic Resonance Imaging Research Center, Institute of Psychology, Chinese Academy of SciencesBeijing, China
| | | | - Rongqiao He
- State Key Laboratory of Brain and Cognitive Science, Institute of Biophysics, Chinese Academy of Sciences Beijing, China
| | | | - Juan Li
- Center on Aging Psychology, CAS Key Laboratory of Mental Health, Institute of Psychology, Chinese Academy of SciencesBeijing, China; Department of Psychology, University of Chinese Academy of SciencesBeijing, China; Magnetic Resonance Imaging Research Center, Institute of Psychology, Chinese Academy of SciencesBeijing, China; State Key Laboratory of Brain and Cognitive Science, Institute of Biophysics, Chinese Academy of SciencesBeijing, China
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22
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Devitt AL, Schacter DL. False memories with age: Neural and cognitive underpinnings. Neuropsychologia 2016; 91:346-359. [PMID: 27592332 DOI: 10.1016/j.neuropsychologia.2016.08.030] [Citation(s) in RCA: 90] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2016] [Revised: 08/30/2016] [Accepted: 08/31/2016] [Indexed: 11/30/2022]
Abstract
As we age we become increasingly susceptible to memory distortions and inaccuracies. Over the past decade numerous neuroimaging studies have attempted to illuminate the neural underpinnings of aging and false memory. Here we review these studies, and link their findings with those concerning the cognitive properties of age-related changes in memory accuracy. Collectively this evidence points towards a prominent role for age-related declines in medial temporal and prefrontal brain areas, and corresponding impairments in associative binding and strategic monitoring. A resulting cascade of cognitive changes contributes to the heightened vulnerability to false memories with age, including reduced recollective ability, a reliance on gist information and familiarity-based monitoring mechanisms, as well as a reduced ability to inhibit irrelevant information and erroneous binding of features between memory traces. We consider both theoretical and applied implications of research on aging and false memories, as well as questions remaining to be addressed in future research.
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23
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Shing YL, Brehmer Y, Heekeren HR, Bäckman L, Lindenberger U. Neural activation patterns of successful episodic encoding: Reorganization during childhood, maintenance in old age. Dev Cogn Neurosci 2016; 20:59-69. [PMID: 27434313 PMCID: PMC6987717 DOI: 10.1016/j.dcn.2016.06.003] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2015] [Revised: 06/22/2016] [Accepted: 06/26/2016] [Indexed: 01/08/2023] Open
Abstract
The two-component framework of episodic memory (EM) development posits that the contributions of medial temporal lobe (MTL) and prefrontal cortex (PFC) to successful encoding differ across the lifespan. To test the framework’s hypotheses, we compared subsequent memory effects (SME) of 10–12 year-old children, younger adults, and older adults using functional magnetic resonance imaging (fMRI). Memory was probed by cued recall, and SME were defined as regional activation differences during encoding between subsequently correctly recalled versus omitted items. In MTL areas, children’s SME did not differ in magnitude from those of younger and older adults. In contrast, children’s SME in PFC were weaker than the corresponding SME in younger and older adults, in line with the hypothesis that PFC contributes less to successful encoding in childhood. Differences in SME between younger and older adults were negligible. The present results suggest that, among individuals with high memory functioning, the neural circuitry contributing to successful episodic encoding is reorganized from middle childhood to adulthood. Successful episodic encoding in later adulthood, however, is characterized by the ability to maintain the activation patterns that emerged in young adulthood.
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Affiliation(s)
- Yee Lee Shing
- Center for Lifespan Psychology, Max Planck Institute for Human Development, Berlin, Germany; Division of Psychology, Faculty of Natural Sciences, University of Stirling, UK.
| | - Yvonne Brehmer
- Center for Lifespan Psychology, Max Planck Institute for Human Development, Berlin, Germany; Aging Research Center, Karolinska Institutet and Stockholm University, Sweden; Otto Hahn Research Group on Associative Memory in Old Age, Max Planck Institute for Human Development, Berlin, Germany
| | - Hauke R Heekeren
- Department of Education and Psychology, Freie Universität Berlin, Germany
| | - Lars Bäckman
- Aging Research Center, Karolinska Institutet and Stockholm University, Sweden
| | - Ulman Lindenberger
- Center for Lifespan Psychology, Max Planck Institute for Human Development, Berlin, Germany; European University Institute, San Domenico di Fiesole (FI), Italy
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24
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Papenberg G, Ferencz B, Mangialasche F, Mecocci P, Cecchetti R, Kalpouzos G, Fratiglioni L, Bäckman L. Physical activity and inflammation: effects on gray-matter volume and cognitive decline in aging. Hum Brain Mapp 2016; 37:3462-73. [PMID: 27159568 DOI: 10.1002/hbm.23252] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2015] [Revised: 04/25/2016] [Accepted: 04/27/2016] [Indexed: 01/02/2023] Open
Abstract
Physical activity has been positively associated with gray-matter integrity. In contrast, pro-inflammatory cytokines seem to have negative effects on the aging brain and have been related to dementia. It was investigated whether an inactive lifestyle and high levels of inflammation resulted in smaller gray-matter volumes and predicted cognitive decline across 6 years in a population-based study of older adults (n = 414). Self-reported physical activity (fitness-enhancing, health-enhancing, inadequate) was linked to gray-matter volume, such that individuals with inadequate physical activity had the least gray matter. There were no overall associations between different pro-and anti-inflammatory markers (IL-1β, IL-6, IL-10, IL-12p40, IL-12p70, G-CSF, and TNF-α) and gray-matter integrity. However, persons with inadequate activity and high levels of the pro-inflammatory marker IL-12p40 had smaller volumes of lateral prefrontal cortex and hippocampus and declined more on the Mini-Mental State Examination test over 6 years compared with physically inactive individuals with low levels of IL-12p40 and to more physically active persons, irrespective of their levels of IL-12p40. These patterns of data suggested that inflammation was particularly detrimental in inactive older adults and may exacerbate the negative effects of physical inactivity on brain and cognition in old age. Hum Brain Mapp 37:3462-3473, 2016. © 2016 Wiley Periodicals, Inc.
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Affiliation(s)
- Goran Papenberg
- Aging Research Center, Karolinska Institutet and Stockholm University, Stockholm, Sweden
| | - Beata Ferencz
- Aging Research Center, Karolinska Institutet and Stockholm University, Stockholm, Sweden
| | - Francesca Mangialasche
- Aging Research Center, Karolinska Institutet and Stockholm University, Stockholm, Sweden
| | - Patrizia Mecocci
- Section of Gerontology and Geriatrics, Department of Medicine, University of Perugia, Perugia, Italy
| | - Roberta Cecchetti
- Section of Gerontology and Geriatrics, Department of Medicine, University of Perugia, Perugia, Italy
| | - Grégoria Kalpouzos
- Aging Research Center, Karolinska Institutet and Stockholm University, Stockholm, Sweden
| | - Laura Fratiglioni
- Aging Research Center, Karolinska Institutet and Stockholm University, Stockholm, Sweden.,Stockholm Gerontology Research Center, Stockholm, Sweden
| | - Lars Bäckman
- Aging Research Center, Karolinska Institutet and Stockholm University, Stockholm, Sweden.,Stockholm Gerontology Research Center, Stockholm, Sweden
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25
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Brehmer Y, Shing YL, Heekeren HR, Lindenberger U, Bäckman L. Training-induced changes in subsequent-memory effects: No major differences among children, younger adults, and older adults. Neuroimage 2015; 131:214-25. [PMID: 26673112 DOI: 10.1016/j.neuroimage.2015.11.074] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2015] [Revised: 11/13/2015] [Accepted: 11/30/2015] [Indexed: 10/22/2022] Open
Abstract
The neural correlates of encoding mode, or the state of forming new memory episodes, have been found to change with age and mnemonic training. However, it is unclear whether neural correlates of encoding success, termed subsequent-memory (SM) effects, also differ by age and mnemonic skill. In a multi-session training study, we investigated whether SM effects are altered by instruction and training in a mnemonic skill, and whether such alterations differ among children, younger adults, and older adults. Before and after strategy training, fMRI data were collected while participants were memorizing word pairs. In all age groups, participants receiving training showed greater performance gains than control group participants. Analysis of task-relevant regions showed training-induced reductions in SM effects in left frontal regions. Reductions in SM effects largely generalized across age and primarily reflected greater training-induced activation increases for omissions than for remembered items, indicating that training resulted in more consistent use of the mnemonic strategy. The present results reveal no major age differences in SM effects in children, younger adults, and older adults.
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Affiliation(s)
- Yvonne Brehmer
- Aging Research Center, Karolinska Institutet and Stockholm University, Stockholm, Sweden; Center for Lifespan Psychology, Max Planck Institute for Human Development, Berlin, Germany.
| | - Yee Lee Shing
- Center for Lifespan Psychology, Max Planck Institute for Human Development, Berlin, Germany; School of Natural Sciences, University of Stirling, Stirling, UK
| | - Hauke R Heekeren
- Department of Education Sciences and Psychology, Freie Universität, Berlin, Berlin, Germany
| | - Ulman Lindenberger
- Center for Lifespan Psychology, Max Planck Institute for Human Development, Berlin, Germany; Department of Political and Social Sciences, European University Institute, San Domenico di Fiesole, Fiesole, Italy
| | - Lars Bäckman
- Aging Research Center, Karolinska Institutet and Stockholm University, Stockholm, Sweden
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26
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Papenberg G, Lindenberger U, Bäckman L. Aging-related magnification of genetic effects on cognitive and brain integrity. Trends Cogn Sci 2015; 19:506-14. [PMID: 26187033 DOI: 10.1016/j.tics.2015.06.008] [Citation(s) in RCA: 51] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2015] [Revised: 06/11/2015] [Accepted: 06/22/2015] [Indexed: 11/17/2022]
Abstract
Heritability studies document substantial genetic influences on cognitive performance and decline in old age. Increasing evidence shows that effects of genetic variations on cognition, brain structure, and brain function become stronger as people age. Disproportionate impairments are typically observed for older individuals carrying disadvantageous genotypes of different candidate genes. These data support the resource-modulation hypothesis, which states that genetic effects are magnified in persons with constrained neural resources, such as older adults. However, given that findings are not unequivocal, we discuss the need to address several factors that may resolve inconsistencies in the extant literature (gene-gene and gene-environment interactions, study populations, gene-environment correlations, and epigenetic mechanisms).
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Affiliation(s)
- Goran Papenberg
- Aging Research Center, Karolinska Institutet and Stockholm University, Stockholm, Sweden.
| | - Ulman Lindenberger
- Center for Lifespan Psychology, Max Planck Institute for Human Development, Berlin, Germany; Max Planck University College London Centre for Computational Psychiatry and Ageing Research, London, UK
| | - Lars Bäckman
- Aging Research Center, Karolinska Institutet and Stockholm University, Stockholm, Sweden
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