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Thibault N, Albouy P, Grondin S. Distinct brain dynamics and networks for processing short and long auditory time intervals. Sci Rep 2023; 13:22018. [PMID: 38086944 PMCID: PMC10716402 DOI: 10.1038/s41598-023-49562-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2023] [Accepted: 12/09/2023] [Indexed: 12/18/2023] Open
Abstract
Psychophysical studies suggest that time intervals above and below 1.2 s are processed differently in the human brain. However, the neural underpinnings of this dissociation remain unclear. Here, we investigate whether distinct or common brain networks and dynamics support the passive perception of short (below 1.2 s) and long (above 1.2 s) empty time intervals. Twenty participants underwent an EEG recording during an auditory oddball paradigm with .8- and 1.6-s standard time intervals and deviant intervals either shorter (early) or longer (delayed) than the standard interval. We computed the auditory ERPs for each condition at the sensor and source levels. We then performed whole brain cluster-based permutation statistics for the CNV, N1 and P2, components, testing deviants against standards. A CNV was found only for above 1.2 s intervals (delayed deviants), with generators in temporo-parietal, SMA, and motor regions. Deviance detection of above 1.2 s intervals occurred during the N1 period over fronto-central sensors for delayed deviants only, with generators in parietal and motor regions. Deviance detection of below 1.2 s intervals occurred during the P2 period over fronto-central sensors for delayed deviants only, with generators in primary auditory cortex, SMA, IFG, cingulate and parietal cortex. We then identified deviance related changes in directed connectivity using bivariate Granger causality to highlight the networks dynamics associated with interval processing above and below 1.2. These results suggest that distinct brain dynamics and networks support the perception of time intervals above and below 1.2 s.
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Affiliation(s)
- Nicola Thibault
- École de Psychologie, Université Laval, Québec, G1V 0A6, Canada.
- CERVO Brain Research Centre, Québec, G1J 2G3, Canada.
| | - Philippe Albouy
- École de Psychologie, Université Laval, Québec, G1V 0A6, Canada
- CERVO Brain Research Centre, Québec, G1J 2G3, Canada
- International Laboratory for Brain, Music and Sound Research (BRAMS), CRBLM, Montreal, QC, H2V 2J2, Canada
| | - Simon Grondin
- École de Psychologie, Université Laval, Québec, G1V 0A6, Canada
- CERVO Brain Research Centre, Québec, G1J 2G3, Canada
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2
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Zhang J, Xie L, Cheng C, Liu Y, Zhang X, Wang H, Hu J, Yu H, Xu J. Hippocampal subfield volumes in mild cognitive impairment and alzheimer's disease: a systematic review and meta-analysis. Brain Imaging Behav 2023; 17:778-793. [PMID: 37768441 DOI: 10.1007/s11682-023-00804-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 09/10/2023] [Indexed: 09/29/2023]
Abstract
The hippocampus is a complex structure that consists of several subfields with distinct and specialized functions. Although numerous studies have been performed to explore hippocampal atrophy at the sub-regional level in mild cognitive impairment (MCI) and Alzheimer's disease (AD), the results have been inconsistent especially for whether and which subfields can be served as the most potential biomarkers in MCI and AD. Herein, we used a meta-analytic approach to synthesize the extant literatures on hippocampal subfields in MCI and AD through PubMed, Web of Science, and Embase (PROSPERO CRD42021257586). As a result, a total of twenty studies using Freesurfer 5 and Freesurfer 6 were included in this investigation. These studies revealed that at the sub-regional level, hippocampal subfield volume reductions in MCI and AD were not restricted to specific subfields, and subiculum and presubiculum had the largest z-scores across most comparisons. However, none of the subfield performed much better in discriminating MCI and HC, AD and MCI, AD and HC as compared to whole hippocampus volume. These results suggested that we should explore the changes in the hippocampal subfields in subtypes of MCI or even at an earlier stage, that is subjective cognitive impairment.
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Affiliation(s)
- Jinhuan Zhang
- The fourth Clinical Medical College of Guangzhou University of Chinese Medicine, Shenzhen, 518033, China
- Institute of Biomedical and Health Engineering, Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen, 518055, China
- Shenzhen Traditional Chinese Medicine Hospital, Shenzhen, 518033, China
| | - Linlin Xie
- The fourth Clinical Medical College of Guangzhou University of Chinese Medicine, Shenzhen, 518033, China
- Shenzhen Traditional Chinese Medicine Hospital, Shenzhen, 518033, China
| | - Changjiang Cheng
- The fourth Clinical Medical College of Guangzhou University of Chinese Medicine, Shenzhen, 518033, China
| | - Yongfeng Liu
- Shenzhen Traditional Chinese Medicine Hospital, Shenzhen, 518033, China
| | - Xiaodong Zhang
- Institute of Biomedical and Health Engineering, Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen, 518055, China
| | - Haoyu Wang
- Institute of Biomedical and Health Engineering, Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen, 518055, China
| | - Jingting Hu
- College of Creative Design, Shenzhen Technology University, Shenzhen, China
| | - Haibo Yu
- The fourth Clinical Medical College of Guangzhou University of Chinese Medicine, Shenzhen, 518033, China.
- Shenzhen Traditional Chinese Medicine Hospital, Shenzhen, 518033, China.
| | - Jinping Xu
- Institute of Biomedical and Health Engineering, Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen, 518055, China.
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3
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López-Pérez J, García-Herranz S, Díaz-Mardomingo MDC. Acquisition and consolidation of verbal learning and episodic memory as predictors of the conversion from mild cognitive impairment to probable Alzheimer's disease. NEUROPSYCHOLOGY, DEVELOPMENT, AND COGNITION. SECTION B, AGING, NEUROPSYCHOLOGY AND COGNITION 2023; 30:638-653. [PMID: 35475773 DOI: 10.1080/13825585.2022.2069670] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/10/2023]
Abstract
Verbal episodic memory tests assess memory performance using total learning scores. The analysis of inter-trial indices such as gained (GA) and lost (LA) access can provide additional information on the acquisition and consolidation processes. The main objetive was to determine whether the GA and LA indices, derived from a word-list verbal episodic memory test are useful for predicting cognitive impairment in aging. 60 older people aged was divided into 3 groups: cognitively healthy, stable Mild Cognitive Impairment (MCI) and MCI converting to probable Alzheimer's disease (MCI-conv). The results showed that GA and LA measures are independent from the traditional measures -total score of correct answers-. Logistic regression showed that these values are predictive of the conversion over time and could be a cognitive marker of conversion from MCI to AD. This suggests that the GA index, which shows acquisition processes in word-list tests, may be a marker of cognitive impairment.
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Affiliation(s)
- Jorge López-Pérez
- Department of Basic Psychology I, Faculty of Psychology, Universidad Nacional de Educación a Distancia, Madrid, Spain
| | - Sara García-Herranz
- Department of Basic Psychology II, Faculty of Psychology, Universidad Nacional de Educación a Distancia, Madrid, Spain
- Instituto Mixto de Investigación-Escuela Nacional de Sanidad (IMIENS), Madrid, Spain
| | - María Del Carmen Díaz-Mardomingo
- Department of Basic Psychology I, Faculty of Psychology, Universidad Nacional de Educación a Distancia, Madrid, Spain
- Instituto Mixto de Investigación-Escuela Nacional de Sanidad (IMIENS), Madrid, Spain
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4
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Stern CE, Hasselmo ME. Mechanisms for maintaining information in working memory. Cogn Neurosci 2022; 13:218-219. [PMID: 36214597 PMCID: PMC10121215 DOI: 10.1080/17588928.2022.2131750] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2022] [Indexed: 11/03/2022]
Abstract
The review by Slotnick is valuable for raising the important question of how much the hippocampal activity induced by novel stimuli is due to mechanisms for encoding into long-term memory, and how much is due to working memory. Slotnick's paper implicitly defines working memory as being equivalent to sustained activation during the late delay period. In this commentary, we suggest that cognitive neuroscientists should consider a broader range of cellular and synaptic mechanisms for maintaining information in working memory.
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Affiliation(s)
- Chantal E Stern
- Center for Systems Neuroscience, Boston University, Boston, USA
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5
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Feng H, Su J, Fang W, Chen X, He J. The entorhinal cortex modulates trace fear memory formation and neuroplasticity in the mouse lateral amygdala via cholecystokinin. eLife 2021; 10:69333. [PMID: 34779397 PMCID: PMC8629425 DOI: 10.7554/elife.69333] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2021] [Accepted: 11/12/2021] [Indexed: 12/02/2022] Open
Abstract
Although fear memory formation is essential for survival and fear-related mental disorders, the neural circuitry and mechanism are incompletely understood. Here, we utilized trace fear conditioning to study the formation of trace fear memory in mice. We identified the entorhinal cortex (EC) as a critical component of sensory signaling to the amygdala. We adopted both loss-of-function and gain-of-function experiments to demonstrate that release of the cholecystokinin (CCK) from the EC is required for trace fear memory formation. We discovered that CCK-positive neurons project from the EC to the lateral nuclei of the amygdala (LA), and inhibition of CCK-dependent signaling in the EC prevented long-term potentiation of the auditory response in the LA and formation of trace fear memory. In summary, high-frequency activation of EC neurons triggers the release of CCK in their projection terminals in the LA, potentiating auditory response in LA neurons. The neural plasticity in the LA leads to trace fear memory formation.
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Affiliation(s)
- Hemin Feng
- Departments of Neuroscience and Biomedical Sciences, City University of Hong Kong, Hong Kong, China.,Centre for Regenerative Medicine and Health, Hong Kong Institute of Science & Innovation, Chinese Academy of Sciences, Hong Kong SAR, China
| | - Junfeng Su
- Departments of Neuroscience and Biomedical Sciences, City University of Hong Kong, Hong Kong, China.,City University of Hong Kong Shenzhen Research Institute, Shenzhen, Guangzhou, China
| | - Wei Fang
- Departments of Neuroscience and Biomedical Sciences, City University of Hong Kong, Hong Kong, China
| | - Xi Chen
- Departments of Neuroscience and Biomedical Sciences, City University of Hong Kong, Hong Kong, China.,City University of Hong Kong Shenzhen Research Institute, Shenzhen, Guangzhou, China
| | - Jufang He
- Departments of Neuroscience and Biomedical Sciences, City University of Hong Kong, Hong Kong, China.,City University of Hong Kong Shenzhen Research Institute, Shenzhen, Guangzhou, China
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Postma TS, Cury C, Baxendale S, Thompson PJ, Cano-López I, de Tisi J, Burdett JL, Sidhu MK, Caciagli L, Winston GP, Vos SB, Thom M, Duncan JS, Koepp MJ, Galovic M. Hippocampal Shape Is Associated with Memory Deficits in Temporal Lobe Epilepsy. Ann Neurol 2020; 88:170-182. [PMID: 32379905 PMCID: PMC8432153 DOI: 10.1002/ana.25762] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2019] [Revised: 04/28/2020] [Accepted: 04/29/2020] [Indexed: 12/29/2022]
Abstract
Objective Cognitive problems, especially disturbances in episodic memory, and hippocampal sclerosis are common in temporal lobe epilepsy (TLE), but little is known about the relationship of hippocampal morphology with memory. We aimed to relate hippocampal surface‐shape patterns to verbal and visual learning. Methods We analyzed hippocampal surface shapes on high‐resolution magnetic resonance images and the Adult Memory and Information Processing Battery in 145 unilateral refractory TLE patients undergoing epilepsy surgery, a validation set of 55 unilateral refractory TLE patients, and 39 age‐ and sex‐matched healthy volunteers. Results Both left TLE (LTLE) and right TLE (RTLE) patients had lower verbal (LTLE 44 ± 11; RTLE 45 ± 10) and visual learning (LTLE 34 ± 8, RTLE 30 ± 8) scores than healthy controls (verbal 58 ± 8, visual 39 ± 6; p < 0.001). Verbal learning was more impaired the greater the atrophy of the left superolateral hippocampal head. In contrast, visual memory was worse with greater bilateral inferomedial hippocampal atrophy. Postsurgical verbal memory decline was more common in LTLE than in RTLE (reliable change index in LTLE 27% vs RTLE 7%, p = 0.006), whereas there were no differences in postsurgical visual memory decline between those groups. Preoperative atrophy of the left hippocampal tail predicted postsurgical verbal memory decline. Interpretation Memory deficits in TLE are associated with specific morphological alterations of the hippocampus, which could help stratify TLE patients into those at high versus low risk of presurgical or postsurgical memory deficits. This knowledge could improve planning and prognosis of selective epilepsy surgery and neuropsychological counseling in TLE. ANN NEUROL 2020 ANN NEUROL 2020;88:170–182
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Affiliation(s)
- Tjardo S Postma
- Department of Clinical and Experimental Epilepsy, University College London Queen Square Institute of Neurology, London, United Kingdom.,MRI Unit, Epilepsy Society, Chalfont St Peter, United Kingdom.,GGZ inGeest Specialized Mental Health Care, Amsterdam, the Netherlands
| | - Claire Cury
- Department of Medical Physics and Biomedical Engineering, University College London, London, United Kingdom.,University of Rennes, Inria, Inserm, CNRS, IRISA UMR 6074, Empenn team ERL U 1228, F-35000, Rennes, France.,Centre for Medical Image Computing, University College London, London, United Kingdom
| | - Sallie Baxendale
- Department of Clinical and Experimental Epilepsy, University College London Queen Square Institute of Neurology, London, United Kingdom
| | - Pamela J Thompson
- Department of Clinical and Experimental Epilepsy, University College London Queen Square Institute of Neurology, London, United Kingdom
| | - Irene Cano-López
- Department of Clinical and Experimental Epilepsy, University College London Queen Square Institute of Neurology, London, United Kingdom.,Valencian International University, Valencia, Spain
| | - Jane de Tisi
- Department of Clinical and Experimental Epilepsy, University College London Queen Square Institute of Neurology, London, United Kingdom
| | - Jane L Burdett
- MRI Unit, Epilepsy Society, Chalfont St Peter, United Kingdom
| | - Meneka K Sidhu
- Department of Clinical and Experimental Epilepsy, University College London Queen Square Institute of Neurology, London, United Kingdom.,MRI Unit, Epilepsy Society, Chalfont St Peter, United Kingdom
| | - Lorenzo Caciagli
- Department of Clinical and Experimental Epilepsy, University College London Queen Square Institute of Neurology, London, United Kingdom.,MRI Unit, Epilepsy Society, Chalfont St Peter, United Kingdom
| | - Gavin P Winston
- Department of Clinical and Experimental Epilepsy, University College London Queen Square Institute of Neurology, London, United Kingdom.,MRI Unit, Epilepsy Society, Chalfont St Peter, United Kingdom.,Department of Medicine, Division of Neurology, Queen's University, Kingston, Canada
| | - Sjoerd B Vos
- Department of Clinical and Experimental Epilepsy, University College London Queen Square Institute of Neurology, London, United Kingdom.,MRI Unit, Epilepsy Society, Chalfont St Peter, United Kingdom.,Department of Medicine, Division of Neurology, Queen's University, Kingston, Canada
| | - Maria Thom
- Department of Clinical and Experimental Epilepsy, University College London Queen Square Institute of Neurology, London, United Kingdom
| | - John S Duncan
- Department of Clinical and Experimental Epilepsy, University College London Queen Square Institute of Neurology, London, United Kingdom.,MRI Unit, Epilepsy Society, Chalfont St Peter, United Kingdom
| | - Matthias J Koepp
- Department of Clinical and Experimental Epilepsy, University College London Queen Square Institute of Neurology, London, United Kingdom.,MRI Unit, Epilepsy Society, Chalfont St Peter, United Kingdom
| | - Marian Galovic
- Department of Clinical and Experimental Epilepsy, University College London Queen Square Institute of Neurology, London, United Kingdom.,MRI Unit, Epilepsy Society, Chalfont St Peter, United Kingdom.,Department of Neurology, University Hospital Zurich, Zurich, Switzerland
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7
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Calabro FJ, Murty VP, Jalbrzikowski M, Tervo-Clemmens B, Luna B. Development of Hippocampal-Prefrontal Cortex Interactions through Adolescence. Cereb Cortex 2020; 30:1548-1558. [PMID: 31670797 PMCID: PMC7132933 DOI: 10.1093/cercor/bhz186] [Citation(s) in RCA: 57] [Impact Index Per Article: 14.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2019] [Revised: 06/24/2019] [Accepted: 07/21/2019] [Indexed: 12/20/2022] Open
Abstract
Significant improvements in cognitive control occur from childhood through adolescence, supported by the maturation of prefrontal systems. However, less is known about the neural basis of refinements in cognitive control proceeding from adolescence to adulthood. Accumulating evidence indicates that integration between hippocampus (HPC) and prefrontal cortex (PFC) supports flexible cognition and has a protracted neural maturation. Using a longitudinal design (487 scans), we characterized developmental changes from 8 to 32 years of age in HPC-PFC functional connectivity at rest and its associations with cognitive development. Results indicated significant increases in functional connectivity between HPC and ventromedial PFC (vmPFC), but not dorsolateral PFC. Importantly, HPC-vmPFC connectivity exclusively predicted performance on the Stockings of Cambridge task, which probes problem solving and future planning. These data provide evidence that maturation of high-level cognition into adulthood is supported by increased functional integration across the HPC and vmPFC through adolescence.
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Affiliation(s)
- Finnegan J Calabro
- Department of Psychiatry, University of Pittsburgh, Pittsburgh, PA 15213, USA
- Department of Bioengineering, University of Pittsburgh, Pittsburgh, PA 15213, USA
| | - Vishnu P Murty
- Department of Psychology, Temple University, Philadelphia, PA 19122, USA
| | - Maria Jalbrzikowski
- Department of Psychiatry, University of Pittsburgh, Pittsburgh, PA 15213, USA
| | | | - Beatriz Luna
- Department of Psychiatry, University of Pittsburgh, Pittsburgh, PA 15213, USA
- Department of Psychology, University of Pittsburgh, Pittsburgh, PA 15213, USA
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8
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Prefrontal working memory activity predicts episodic memory performance: A neuroimaging study. Behav Brain Res 2020; 379:112307. [DOI: 10.1016/j.bbr.2019.112307] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2019] [Revised: 10/09/2019] [Accepted: 10/15/2019] [Indexed: 01/06/2023]
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Nauer RK, Dunne MF, Stern CE, Storer TW, Schon K. Improving fitness increases dentate gyrus/CA3 volume in the hippocampal head and enhances memory in young adults. Hippocampus 2019; 30:488-504. [PMID: 31588607 DOI: 10.1002/hipo.23166] [Citation(s) in RCA: 29] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2019] [Revised: 08/30/2019] [Accepted: 09/06/2019] [Indexed: 12/25/2022]
Abstract
Converging evidence suggests a relationship between aerobic exercise and hippocampal neuroplasticity that interactively impacts hippocampally dependent memory. The majority of human studies have focused on the potential for exercise to reduce brain atrophy and attenuate cognitive decline in older adults, whereas animal studies often center on exercise-induced neurogenesis and hippocampal plasticity in the dentate gyrus (DG) of young adult animals. In the present study, initially sedentary young adults (18-35 years) participated in a moderate-intensity randomized controlled exercise intervention trial (ClinicalTrials.gov; NCT02057354) for a duration of 12 weeks. The aims of the study were to investigate the relationship between change in cardiorespiratory fitness (CRF) as determined by estimated V ˙ O 2 MAX , hippocampally dependent mnemonic discrimination, and change in hippocampal subfield volume. Results show that improving CRF after exercise training is associated with an increased volume in the left DG/CA3 subregion in young adults. Consistent with previous studies that found exercise-induced increases in anterior hippocampus in older adults, this result was specific to the hippocampal head, or most anterior portion, of the subregion. Our results also demonstrate a positive relationship between change in CRF and change in corrected accuracy for trials requiring the highest level of discrimination on a putative behavioral pattern separation task. This relationship was observed in individuals who were initially lower-fit, suggesting that individuals who show greater improvement in their CRF may receive greater cognitive benefit. This work extends animal models by providing evidence for exercise-induced neuroplasticity specific to the neurogenic zone of the human hippocampus.
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Affiliation(s)
- Rachel K Nauer
- Department of Psychological and Brain Sciences, Boston University, Boston, Massachusetts.,Center for Memory and Brain, Boston University, Boston, Massachusetts.,Center for Systems Neuroscience, Boston University, Boston, Massachusetts.,Department of Anatomy and Neurobiology, Boston University School of Medicine, Boston, Massachusetts
| | - Matthew F Dunne
- Center for Systems Neuroscience, Boston University, Boston, Massachusetts.,Department of Anatomy and Neurobiology, Boston University School of Medicine, Boston, Massachusetts
| | - Chantal E Stern
- Department of Psychological and Brain Sciences, Boston University, Boston, Massachusetts.,Center for Memory and Brain, Boston University, Boston, Massachusetts.,Center for Systems Neuroscience, Boston University, Boston, Massachusetts
| | - Thomas W Storer
- Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts
| | - Karin Schon
- Department of Psychological and Brain Sciences, Boston University, Boston, Massachusetts.,Center for Memory and Brain, Boston University, Boston, Massachusetts.,Center for Systems Neuroscience, Boston University, Boston, Massachusetts.,Department of Anatomy and Neurobiology, Boston University School of Medicine, Boston, Massachusetts
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10
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Greenberg J, Romero VL, Elkin-Frankston S, Bezdek MA, Schumacher EH, Lazar SW. Reduced interference in working memory following mindfulness training is associated with increases in hippocampal volume. Brain Imaging Behav 2019; 13:366-376. [PMID: 29549665 PMCID: PMC6141345 DOI: 10.1007/s11682-018-9858-4] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Abstract
Proactive interference occurs when previously relevant information interferes with retaining newer material. Overcoming proactive interference has been linked to the hippocampus and deemed critical for cognitive functioning. However, little is known about whether and how this ability can be improved or about the neural correlates of such improvement. Mindfulness training emphasizes focusing on the present moment and minimizing distraction from competing thoughts and memories. It improves working memory and increases hippocampal density. The current study examined whether mindfulness training reduces proactive interference in working memory and whether such improvements are associated with changes in hippocampal volume. 79 participants were randomized to a 4-week web-based mindfulness training program or a similarly structured creative writing active control program. The mindfulness group exhibited lower proactive interference error rates compared to the active control group following training. No group differences were found in hippocampal volume, yet proactive interference improvements following mindfulness training were significantly associated with volume increases in the left hippocampus. These results provide the first evidence to suggest that (1) mindfulness training can protect against proactive interference, and (2) that these benefits are related to hippocampal volumetric increases. Clinical implications regarding the application of mindfulness training in conditions characterized by impairments to working memory and reduced hippocampal volume such as aging, depression, PTSD, and childhood adversity are discussed.
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Affiliation(s)
- Jonathan Greenberg
- Department of Psychiatry, Massachusetts General Hospital, Boston, MA, USA.
- Harvard Medical School, Boston, MA, USA.
| | | | | | - Matthew A Bezdek
- School of Psychology, Georgia Institute of Technology, Atlanta, GA, USA
| | - Eric H Schumacher
- School of Psychology, Georgia Institute of Technology, Atlanta, GA, USA
| | - Sara W Lazar
- Department of Psychiatry, Massachusetts General Hospital, Boston, MA, USA
- Harvard Medical School, Boston, MA, USA
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11
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Gicas KM, Thornton AE, Waclawik K, Wang N, Jones AA, Panenka WJ, Lang DJ, Smith GN, Vila-Rodriguez F, Leonova O, Barr AM, Procyshyn RM, Buchanan T, Su W, Vertinsky AT, Rauscher A, MacEwan GW, Honer WG. Volumes of the Hippocampal Formation Differentiate Component Processes of Memory in a Community Sample of Homeless and Marginally Housed Persons. Arch Clin Neuropsychol 2019; 34:548-562. [PMID: 30407496 DOI: 10.1093/arclin/acy066] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2018] [Revised: 07/10/2018] [Accepted: 07/17/2018] [Indexed: 01/28/2023] Open
Abstract
OBJECTIVE Persons who are homeless or marginally housed exhibit significant cognitive dysfunction, with memory being the most impaired domain. Hippocampal subfield volumes have been found to differentially relate to component processes of memory. The neural correlates of memory have not been previously examined in marginalized persons who are understudied and underserved. We examined whether hippocampal subfields and entorhinal cortex volumes are uniquely related to indices of verbal episodic memory using the Hopkins Verbal Learning Test - Revised. METHOD Data was used from a large sample of community dwelling homeless and marginally housed adults (N = 227). Regression analyses were conducted to examine hippocampal subfield volumes (CA1, CA3, CA4, dentate gyrus, subiculum) and entorhinal cortex, and their associations with measures of verbal immediate recall, learning slope, and verbal delayed recall. RESULTS Greater CA3 subfield volume was associated with better performance on an index of encoding (immediate recall), but only in older individuals. Greater CA1 and subiculum volumes were associated with better performance on immediate and delayed recall (measures that tap into retrieval processes), but not with learning slope (a more pure index of encoding). Entorhinal cortex volume was related to all components of memory beyond total hippocampal volume. CONCLUSIONS Our results suggest common neuroanatomical correlates of memory dysfunction in large sample of marginalized persons, and these are uniquely related to different components of memory. These findings have clinical relevance for marginalized populations and theoretical relevance to the growing literature on functional specialization of the hippocampal subfields.
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Affiliation(s)
- Kristina M Gicas
- Department of Psychiatry, University of British Columbia, Vancouver, Canada
| | - Allen E Thornton
- Department of Psychology, Simon Fraser University, Burnaby, Canada
| | | | - Nena Wang
- Department of Psychology, Simon Fraser University, Burnaby, Canada
| | - Andrea A Jones
- Department of Psychiatry, University of British Columbia, Vancouver, Canada
| | - William J Panenka
- Department of Psychiatry, University of British Columbia, Vancouver, Canada
| | - Donna J Lang
- Department of Radiology, University of British Columbia, Vancouver, Canada
| | - Geoff N Smith
- Department of Psychiatry, University of British Columbia, Vancouver, Canada
| | | | - Olga Leonova
- Department of Psychiatry, University of British Columbia, Vancouver, Canada
| | - Alasdair M Barr
- Department of Anesthesiology, Pharmacology and Therapeutics, University of British Columbia, Vancouver, Canada
| | - Ric M Procyshyn
- Department of Psychiatry, University of British Columbia, Vancouver, Canada
| | - Tari Buchanan
- Department of Psychiatry, University of British Columbia, Vancouver, Canada
| | - Wayne Su
- Department of Psychiatry, University of British Columbia, Vancouver, Canada
| | | | - Alexander Rauscher
- Department of Paediatrics, University of British Columbia, Vancouver, Canada
| | - G William MacEwan
- Department of Psychiatry, University of British Columbia, Vancouver, Canada
| | - William G Honer
- Department of Psychiatry, University of British Columbia, Vancouver, Canada
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12
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Suter EE, Weiss C, Disterhoft JF. Differential responsivity of neurons in perirhinal cortex, lateral entorhinal cortex, and dentate gyrus during time-bridging learning. Hippocampus 2019; 29:511-526. [PMID: 30311282 PMCID: PMC6615905 DOI: 10.1002/hipo.23041] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2017] [Revised: 08/29/2018] [Accepted: 09/24/2018] [Indexed: 12/30/2022]
Abstract
Many studies have focused on the function of hippocampal region CA1 as a critical site for associative memory, but much less is known about changes in the afferents to CA1. Here we report the activity of multiple single neurons from perirhinal and entorhinal cortex and from dentate gyrus during trace eyeblink conditioning as well as consolidated recall, and in pseudo-conditioned control rabbits. We also report an analysis of theta activity filtered from the local field potential (LFP). Our results show early associative changes in single-neuron firing rate as well as theta oscillations in lateral entorhinal cortex (EC) and dentate gyrus (DG), and increases in the number of responsive neurons in perirhinal cortex. In both EC and DG, a subset of neurons from conditioned animals exhibited an elevated baseline firing rate and large responses to the conditioned stimulus and trace period. A similar population of cells has been seen in DG and in medial, but not lateral, EC during spatial tasks, suggesting that lateral EC contains cells responsive to a temporal associative task. In contrast to recent studies in our laboratory that found significant CA1 contributions to long-term memory, the activity profiles of neurons within EC and DG were similar for conditioned and pseudoconditioned rabbits during post-consolidation sessions. Collectively these results demonstrate that individual subregions of medial temporal lobe differentially support new and remotely acquired memories. Neuron firing profiles were similar on training trials when conditioned responses were and were not exhibited, demonstrating that these temporal lobe regions represent the CS-US association and do not control the behavioral response. The analysis of theta activity revealed that theta power was modulated by the conditioning stimuli in both the conditioned and pseudoconditioned groups and that although both groups exhibited a resetting of phase to the corneal airpuff, only the conditioned group exhibited a resetting of phase to the whisker conditioned stimulus.
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Affiliation(s)
- Eugénie E Suter
- Department of Physiology, Feinberg School of Medicine, Northwestern University, Chicago, Illinois
| | - Craig Weiss
- Department of Physiology, Feinberg School of Medicine, Northwestern University, Chicago, Illinois
| | - John F Disterhoft
- Department of Physiology, Feinberg School of Medicine, Northwestern University, Chicago, Illinois
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13
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Involvement of hippocampal subfields and anterior-posterior subregions in encoding and retrieval of item, spatial, and associative memories: Longitudinal versus transverse axis. Neuroimage 2019; 191:568-586. [DOI: 10.1016/j.neuroimage.2019.01.061] [Citation(s) in RCA: 31] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2018] [Revised: 01/17/2019] [Accepted: 01/22/2019] [Indexed: 11/18/2022] Open
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14
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Aslaksen PM, Bystad MK, Ørbo MC, Vangberg TR. The relation of hippocampal subfield volumes to verbal episodic memory measured by the California Verbal Learning Test II in healthy adults. Behav Brain Res 2018; 351:131-137. [DOI: 10.1016/j.bbr.2018.06.008] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2018] [Revised: 06/04/2018] [Accepted: 06/07/2018] [Indexed: 01/25/2023]
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15
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Reboreda A, Theissen FM, Valero-Aracama MJ, Arboit A, Corbu MA, Yoshida M. Do TRPC channels support working memory? Comparing modulations of TRPC channels and working memory through G-protein coupled receptors and neuromodulators. Behav Brain Res 2018; 354:64-83. [PMID: 29501506 DOI: 10.1016/j.bbr.2018.02.042] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2017] [Revised: 02/27/2018] [Accepted: 02/27/2018] [Indexed: 12/11/2022]
Abstract
Working memory is a crucial ability we use in daily life. However, the cellular mechanisms supporting working memory still remain largely unclear. A key component of working memory is persistent neural firing which is believed to serve short-term (hundreds of milliseconds up to tens of seconds) maintenance of necessary information. In this review, we will focus on the role of transient receptor potential canonical (TRPC) channels as a mechanism underlying persistent firing. Many years of in vitro work have been suggesting a crucial role of TRPC channels in working memory and temporal association tasks. If TRPC channels are indeed a central mechanism for working memory, manipulations which impair or facilitate working memory should have a similar effect on TRPC channel modulation. However, modulations of working memory and TRPC channels were never systematically compared, and it remains unanswered whether TRPC channels indeed contribute to working memory in vivo or not. In this article, we review the effects of G-protein coupled receptors (GPCR) and neuromodulators, including acetylcholine, noradrenalin, serotonin and dopamine, on working memory and TRPC channels. Based on comparisons, we argue that GPCR and downstream signaling pathways that activate TRPC, generally support working memory, while those that suppress TRPC channels impair it. However, depending on the channel types, areas, and systems tested, this is not the case in all studies. Further work to clarify involvement of specific TRPC channels in working memory tasks and how they are affected by neuromodulators is still necessary in the future.
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Affiliation(s)
- Antonio Reboreda
- Leibniz Institute for Neurobiology (LIN) Magdeburg, Brenneckestraße 6, 39118 Magdeburg, Germany; German Center for Neurodegenerative Diseases (DZNE) Magdeburg, Leipziger Str. 44/Haus 64, 39120, Magdeburg, Germany.
| | - Frederik M Theissen
- German Center for Neurodegenerative Diseases (DZNE) Magdeburg, Leipziger Str. 44/Haus 64, 39120, Magdeburg, Germany
| | - Maria J Valero-Aracama
- Institute of Physiology and Pathophysiology, Friedrich-Alexander-Universität Erlangen-Nürnberg, Universitätsstraße 17, 91054 Erlangen, Germany
| | - Alberto Arboit
- German Center for Neurodegenerative Diseases (DZNE) Magdeburg, Leipziger Str. 44/Haus 64, 39120, Magdeburg, Germany
| | - Mihaela A Corbu
- Ruhr University Bochum (RUB), Universitätsstraße 150, 44801, Bochum, Germany
| | - Motoharu Yoshida
- Leibniz Institute for Neurobiology (LIN) Magdeburg, Brenneckestraße 6, 39118 Magdeburg, Germany; German Center for Neurodegenerative Diseases (DZNE) Magdeburg, Leipziger Str. 44/Haus 64, 39120, Magdeburg, Germany; Center for Behavioral Brain Sciences, 39106, Magdeburg, Germany.
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16
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Zammit AR, Ezzati A, Zimmerman ME, Lipton RB, Lipton ML, Katz MJ. Roles of hippocampal subfields in verbal and visual episodic memory. Behav Brain Res 2017; 317:157-162. [PMID: 27646772 PMCID: PMC6343125 DOI: 10.1016/j.bbr.2016.09.038] [Citation(s) in RCA: 65] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2016] [Revised: 09/13/2016] [Accepted: 09/15/2016] [Indexed: 01/28/2023]
Abstract
INTRODUCTION Selective hippocampal (HC) subfield atrophy has been reported in older adults with mild cognitive impairment and Alzheimer's disease. The goal of this study was to investigate the associations between the volume of hippocampal subfields and visual and verbal episodic memory in cognitively normal older adults. METHODS This study was conducted on a subset of 133 participants from the Einstein Aging Study (EAS), a community-based study of non-demented older adults systematically recruited from the Bronx, N.Y. All participants completed comprehensive EAS neuropsychological assessment. Visual episodic memory was assessed using the Complex Figure Delayed Recall subtest from the Repeatable Battery for the Assessment of Neuropsychological Status (RBANS). Verbal episodic memory was assessed using Delayed Recall from the Free and Cued Selective Reminding Test (FCSRT). All participants underwent 3T MRI brain scanning with subsequent automatic measurement of the hemispheric hippocampal subfield volumes (CA1, CA2-CA3, CA4-dente gyrus, presubiculum, and subiculum). We used linear regressions to model the association between hippocampal subfield volumes and visual and verbal episodic memory tests while adjusting for age, sex, education, and total intracranial volume. RESULTS Participants had a mean age of 78.9 (SD=5.1) and 60.2% were female. Total hippocampal volume was associated with Complex Figure Delayed Recall (β=0.31, p=0.001) and FCSRT Delayed Recall (β=0.27, p=0.007); subiculum volume was associated with Complex Figure Delayed Recall (β=0.27, p=0.002) and FCSRT Delayed Recall (β=0.24, p=0.010); CA1 was associated with Complex Figure Delayed Recall (β=0.26, p<0.002) and FCSRT Delayed Recall (β=0.20, p=0.025). CONCLUSIONS Our findings confirm previous research on the specific roles of CA1 and subiculum in episodic memory. Our results suggest that hippocampal subfields have sensitive roles in the process of visual and verbal episodic memory.
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Affiliation(s)
- Andrea R Zammit
- Saul B. Korey Department of Neurology, Albert Einstein College of Medicine, Bronx, NY 10461, USA.
| | - Ali Ezzati
- Saul B. Korey Department of Neurology, Albert Einstein College of Medicine, Bronx, NY 10461, USA; Department of Neurology, Montefiore Medical Center, Bronx, NY 10467, USA
| | - Molly E Zimmerman
- Saul B. Korey Department of Neurology, Albert Einstein College of Medicine, Bronx, NY 10461, USA; Department of Psychology, Fordham University, Bronx, NY 10458, USA
| | - Richard B Lipton
- Saul B. Korey Department of Neurology, Albert Einstein College of Medicine, Bronx, NY 10461, USA; Department of Neurology, Montefiore Medical Center, Bronx, NY 10467, USA; Department of Epidemiology and Population Health, Albert Einstein College of Medicine, Yeshiva University, Bronx, NY 10461, USA
| | - Michael L Lipton
- The Gruss Magnetic Resonance Research Center and Departments of Radiology, Psychiatry and Behavioral Sciences and the Dominick P. Purpura Department of Neuroscience, Albert Einstein College of Medicine, Bronx, NY 10461, USA; Department of Radiology, Montefiore Medical Center, Bronx, NY 10467, USA
| | - Mindy J Katz
- Saul B. Korey Department of Neurology, Albert Einstein College of Medicine, Bronx, NY 10461, USA
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Chrastil ER, Sherrill KR, Hasselmo ME, Stern CE. Which way and how far? Tracking of translation and rotation information for human path integration. Hum Brain Mapp 2016; 37:3636-55. [PMID: 27238897 DOI: 10.1002/hbm.23265] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2016] [Revised: 05/03/2016] [Accepted: 05/13/2016] [Indexed: 12/22/2022] Open
Abstract
Path integration, the constant updating of the navigator's knowledge of position and orientation during movement, requires both visuospatial knowledge and memory. This study aimed to develop a systems-level understanding of human path integration by examining the basic building blocks of path integration in humans. To achieve this goal, we used functional imaging to examine the neural mechanisms that support the tracking and memory of translational and rotational components of human path integration. Critically, and in contrast to previous studies, we examined movement in translation and rotation tasks with no defined end-point or goal. Navigators accumulated translational and rotational information during virtual self-motion. Activity in hippocampus, retrosplenial cortex (RSC), and parahippocampal cortex (PHC) increased during both translation and rotation encoding, suggesting that these regions track self-motion information during path integration. These results address current questions regarding distance coding in the human brain. By implementing a modified delayed match to sample paradigm, we also examined the encoding and maintenance of path integration signals in working memory. Hippocampus, PHC, and RSC were recruited during successful encoding and maintenance of path integration information, with RSC selective for tasks that required processing heading rotation changes. These data indicate distinct working memory mechanisms for translation and rotation, which are essential for updating neural representations of current location. The results provide evidence that hippocampus, PHC, and RSC flexibly track task-relevant translation and rotation signals for path integration and could form the hub of a more distributed network supporting spatial navigation. Hum Brain Mapp 37:3636-3655, 2016. © 2016 Wiley Periodicals, Inc.
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Affiliation(s)
- Elizabeth R Chrastil
- Department of Psychological and Brain Sciences and Center for Memory and Brain, Boston University, Boston, Massachusetts.,Massachusetts General Hospital, Athinoula A. Martinos Center for Biomedical Imaging
| | - Katherine R Sherrill
- Department of Psychological and Brain Sciences and Center for Memory and Brain, Boston University, Boston, Massachusetts.,Massachusetts General Hospital, Athinoula A. Martinos Center for Biomedical Imaging
| | - Michael E Hasselmo
- Department of Psychological and Brain Sciences and Center for Memory and Brain, Boston University, Boston, Massachusetts
| | - Chantal E Stern
- Department of Psychological and Brain Sciences and Center for Memory and Brain, Boston University, Boston, Massachusetts.,Massachusetts General Hospital, Athinoula A. Martinos Center for Biomedical Imaging
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18
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Bai F, Yuan Y, Yu H, Zhang Z. Plastic modulation of episodic memory networks in the aging brain with cognitive decline. Behav Brain Res 2016; 308:38-45. [PMID: 27091676 DOI: 10.1016/j.bbr.2016.04.022] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2016] [Revised: 04/11/2016] [Accepted: 04/13/2016] [Indexed: 12/12/2022]
Abstract
Social-cognitive processing has been posited to underlie general functions such as episodic memory. Episodic memory impairment is a recognized hallmark of amnestic mild cognitive impairment (aMCI) who is at a high risk for dementia. Three canonical networks, self-referential processing, executive control processing and salience processing, have distinct roles in episodic memory retrieval processing. It remains unclear whether and how these sub-networks of the episodic memory retrieval system would be affected in aMCI. This task-state fMRI study constructed systems-level episodic memory retrieval sub-networks in 28 aMCI and 23 controls using two computational approaches: a multiple region-of-interest based approach and a voxel-level functional connectivity-based approach, respectively. These approaches produced the remarkably similar findings that the self-referential processing network made critical contributions to episodic memory retrieval in aMCI. More conspicuous alterations in self-referential processing of the episodic memory retrieval network were identified in aMCI. In order to complete a given episodic memory retrieval task, increases in cooperation between the self-referential processing network and other sub-networks were mobilized in aMCI. Self-referential processing mediate the cooperation of the episodic memory retrieval sub-networks as it may help to achieve neural plasticity and may contribute to the prevention and treatment of dementia.
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Affiliation(s)
- Feng Bai
- Department of Neurology, Affiliated ZhongDa Hospital, School of Medicine, Southeast University, Nanjing, China.
| | - Yonggui Yuan
- Department of Neurology, Affiliated ZhongDa Hospital, School of Medicine, Southeast University, Nanjing, China
| | - Hui Yu
- Department of Neurology, Affiliated ZhongDa Hospital, School of Medicine, Southeast University, Nanjing, China
| | - Zhijun Zhang
- Department of Neurology, Affiliated ZhongDa Hospital, School of Medicine, Southeast University, Nanjing, China.
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