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Madanlal D, Guinard C, Nuñez VP, Becker S, Garnham J, Khayachi A, Léger S, O'Donovan C, Singh S, Stern S, Slaney C, Trappenberg T, Alda M, Nunes A. A pilot study examining the impact of lithium treatment and responsiveness on mnemonic discrimination in bipolar disorder. J Affect Disord 2024; 351:49-57. [PMID: 38280568 DOI: 10.1016/j.jad.2024.01.146] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/20/2023] [Revised: 01/09/2024] [Accepted: 01/14/2024] [Indexed: 01/29/2024]
Abstract
INTRODUCTION Mnemonic discrimination (MD), the ability to discriminate new stimuli from similar memories, putatively involves dentate gyrus pattern separation. Since lithium may normalize dentate gyrus functioning in lithium-responsive bipolar disorder (BD), we hypothesized that lithium treatment would be associated with better MD in lithium-responsive BD patients. METHODS BD patients (N = 69; NResponders = 16 [23 %]) performed the Continuous Visual Memory Test (CVMT), which requires discriminating between novel and previously seen images. Before testing, all patients had prophylactic lithium responsiveness assessed over ≥1 year of therapy (with the Alda Score), although only thirty-eight patients were actively prescribed lithium at time of testing (55 %; 12/16 responders, 26/53 nonresponders). We then used computational modelling to extract patient-specific MD indices. Linear models were used to test how (A) lithium treatment, (B) lithium responsiveness via the continuous Alda score, and (C) their interaction, affected MD. RESULTS Superior MD performance was associated with lithium treatment exclusively in lithium-responsive patients (Lithium x AldaScore β = 0.257 [SE 0.078], p = 0.002). Consistent with prior literature, increased age was associated with worse MD (β = -0.03 [SE 0.01], p = 0.005). LIMITATIONS Secondary pilot analysis of retrospectively collected data in a cross-sectional design limits generalizability. CONCLUSION Our study is the first to examine MD performance in BD. Lithium is associated with better MD performance only in lithium responders, potentially due to lithium's effects on dentate gyrus granule cell excitability. Our results may influence the development of behavioural probes for dentate gyrus neuronal hyperexcitability in BD.
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Affiliation(s)
- Dhanyaasri Madanlal
- Department of Psychiatry, Dalhousie University, Halifax, Nova Scotia, Canada
| | - Christian Guinard
- Department of Psychiatry, Dalhousie University, Halifax, Nova Scotia, Canada; Faculty of Computer Science, Dalhousie University, Halifax, Nova Scotia, Canada
| | - Vanessa Pardo Nuñez
- Department of Psychiatry, Dalhousie University, Halifax, Nova Scotia, Canada
| | - Suzanna Becker
- Department of Psychology, Neuroscience & Behaviour, McMaster University, Hamilton, Ontario, Canada
| | - Julie Garnham
- Department of Psychiatry, Dalhousie University, Halifax, Nova Scotia, Canada
| | - Anouar Khayachi
- Montreal Neurological Institute, Department of Neurology & Neurosurgery, McGill University, Montreal, Quebec, Canada
| | - Simon Léger
- Department of Psychiatry, Dalhousie University, Halifax, Nova Scotia, Canada
| | - Claire O'Donovan
- Department of Psychiatry, Dalhousie University, Halifax, Nova Scotia, Canada
| | - Selena Singh
- Department of Psychology, Neuroscience & Behaviour, McMaster University, Hamilton, Ontario, Canada
| | - Shani Stern
- Sagol Department of Neurobiology, Faculty of Natural Sciences, University of Haifa, Israel
| | - Claire Slaney
- Department of Psychiatry, Dalhousie University, Halifax, Nova Scotia, Canada
| | - Thomas Trappenberg
- Faculty of Computer Science, Dalhousie University, Halifax, Nova Scotia, Canada
| | - Martin Alda
- Department of Psychiatry, Dalhousie University, Halifax, Nova Scotia, Canada
| | - Abraham Nunes
- Department of Psychiatry, Dalhousie University, Halifax, Nova Scotia, Canada; Faculty of Computer Science, Dalhousie University, Halifax, Nova Scotia, Canada.
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Wang F, Liu Z, Ford SD, Deng M, Zhang W, Yang J, Palaniyappan L. Aberrant Brain Dynamics in Schizophrenia During Working Memory Task: Evidence From a Replication Functional MRI Study. Schizophr Bull 2024; 50:96-106. [PMID: 37018464 PMCID: PMC10754176 DOI: 10.1093/schbul/sbad032] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 04/07/2023]
Abstract
BACKGROUND AND HYPOTHESIS The integration of information that typifies working memory (WM) operation requires a flexible, dynamic functional relationship among brain regions. In schizophrenia, though WM capacity is prominently impaired at higher loads, the mechanistic underpinnings are unclear. As a result, we lack convincing cognitive remediation of load-dependent deficits. We hypothesize that reduced WM capacity arises from a disruption in dynamic functional connectivity when patients face cognitive demands. STUDY DESIGN We calculate the dynamic voxel-wise degree centrality (dDC) across the functional connectome in 142 patients with schizophrenia and 88 healthy controls (HCs) facing different WM loads during an n-back task. We tested associations of the altered variability in dDC and clinical symptoms and identified intermediate connectivity configurations (clustered states) across time during WM operation. These analyses were repeated in another independent dataset of 169 subjects (102 with schizophrenia). STUDY RESULTS Compared with HCs, patients showed an increased dDC variability of supplementary motor area (SMA) for the "2back vs. 0back" contrast. This instability at the SMA seen in patients correlated with increased positive symptoms and followed a limited "U-shape" pattern at rest-condition and 2 loads. In the clustering analysis, patients showed reduced centrality in the SMA, superior temporal gyrus, and putamen. These results were replicated in a constrained search in the second independent dataset. CONCLUSIONS Schizophrenia is characterized by a load-dependent reduction of stable centrality in SMA; this relates to the severity of positive symptoms, especially disorganized behaviour. Restoring SMA stability in the presence of cognitive demands may have a therapeutic effect in schizophrenia.
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Affiliation(s)
- Feiwen Wang
- Department of Psychiatry, The Second Xiangya Hospital of Central South University, Changsha, Hunan, China
- National Clinical Research Center for Mental Disorders, The Second Xiangya Hospital of Central South University, Changsha, Hunan 410011, China
| | - Zhening Liu
- Department of Psychiatry, The Second Xiangya Hospital of Central South University, Changsha, Hunan, China
- National Clinical Research Center for Mental Disorders, The Second Xiangya Hospital of Central South University, Changsha, Hunan 410011, China
| | - Sabrina D Ford
- Robarts Research Institute, Western University, London, ON, Canada
| | - Mengjie Deng
- Department of Psychiatry, The Second Xiangya Hospital of Central South University, Changsha, Hunan, China
- National Clinical Research Center for Mental Disorders, The Second Xiangya Hospital of Central South University, Changsha, Hunan 410011, China
| | - Wen Zhang
- Department of Psychiatry, The Second Xiangya Hospital of Central South University, Changsha, Hunan, China
- National Clinical Research Center for Mental Disorders, The Second Xiangya Hospital of Central South University, Changsha, Hunan 410011, China
| | - Jie Yang
- Department of Psychiatry, The Second Xiangya Hospital of Central South University, Changsha, Hunan, China
- National Clinical Research Center for Mental Disorders, The Second Xiangya Hospital of Central South University, Changsha, Hunan 410011, China
| | - Lena Palaniyappan
- Robarts Research Institute, Western University, London, ON, Canada
- Department of Psychiatry, Douglas Mental Health University Institute, McGill University, Montreal, QC, Canada
- Department of Medical Biophysics, Western University, London, ON, Canada
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Onishi H, Yokosawa K. Differential working memory function between phonological and visuospatial strategies: a magnetoencephalography study using a same visual task. Front Hum Neurosci 2023; 17:1218437. [PMID: 37680265 PMCID: PMC10480614 DOI: 10.3389/fnhum.2023.1218437] [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: 05/07/2023] [Accepted: 08/08/2023] [Indexed: 09/09/2023] Open
Abstract
Previous studies have reported that, in working memory, the processing of visuospatial information and phonological information have different neural bases. However, in these studies, memory items were presented via different modalities. Therefore, the modality in which the memory items were presented and the strategy for memorizing them were not rigorously distinguished. In the present study, we explored the neural basis of two working memory strategies. Nineteen right-handed young adults memorized seven sequential directions presented visually in a task in which the memory strategy was either visuospatial or phonological (visuospatial/phonological condition). Source amplitudes of theta-band (5-7 Hz) rhythm were estimated from magnetoencephalography during the maintenance period and further analyzed using cluster-based permutation tests. Behavioral results revealed that the accuracy rates showed no significant differences between conditions, while the reaction time in the phonological condition was significantly longer than that in the visuospatial condition. Theta activity in the phonological condition was significantly greater than that in the visuospatial condition, and the cluster in spatio-temporal matrix with p < 5% difference extended to right prefrontal regions in the early maintenance period and right occipito-parietal regions in the late maintenance period. The theta activity results did not indicate strategy-specific neural bases but did reveal the dynamics of executive function required for phonological processing. The functions seemed to move from attention control and inhibition control in the prefrontal region to inhibition of irrelevant information in the occipito-parietal region.
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Affiliation(s)
- Hayate Onishi
- Graduate School of Health Sciences, Hokkaido University, Sapporo, Japan
| | - Koichi Yokosawa
- Faculty of Health Sciences, Hokkaido University, Sapporo, Japan
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Viñas-Guasch N, Ng THB, Heng JG, Chan YC, Chew E, Desmond JE, Chen SHA. Cerebellar Transcranial Magnetic Stimulation (TMS) Impairs Visual Working Memory. CEREBELLUM (LONDON, ENGLAND) 2023; 22:332-347. [PMID: 35355219 PMCID: PMC9522915 DOI: 10.1007/s12311-022-01396-2] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Accepted: 03/15/2022] [Indexed: 10/18/2022]
Abstract
An increasing body of evidence points to the involvement of the cerebellum in cognition. Specifically, previous studies have shown that the superior and inferior portions of the cerebellum are involved in different verbal working memory (WM) mechanisms as part of two separate cerebro-cerebellar loops for articulatory rehearsal and phonological storage mechanisms. In comparison, our understanding of the involvement of the cerebellum in visual WM remains limited. We have previously shown that performance in verbal WM is disrupted by single-pulse transcranial magnetic stimulation (TMS) of the right superior cerebellum. The present study aimed to expand on this notion by exploring whether the inferior cerebellum is similarly involved in visual WM. Here, we used fMRI-guided, double-pulse TMS to probe the necessity of left superior and left inferior cerebellum in visual WM. We first conducted an fMRI localizer using the Sternberg visual WM task, which yielded targets in left superior and inferior cerebellum. Subsequently, TMS stimulation of these regions at the end of the encoding phase resulted in decreased accuracy in the visual WM task. Differences in the visual WM deficits caused by stimulation of superior and inferior left cerebellum raise the possibility that these regions are involved in different stages of visual WM.
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Affiliation(s)
- Nestor Viñas-Guasch
- Psychology, School of Social Sciences, Nanyang Technological University, Singapore, Singapore
| | - Tommy Hock Beng Ng
- National Institute of Education, Nanyang Technological University, Singapore, Singapore
| | - Jiamin Gladys Heng
- Psychology, School of Social Sciences, Nanyang Technological University, Singapore, Singapore
- School of Computer Science and Engineering, Nanyang Technological University, Singapore, Singapore
| | - Yee Cheun Chan
- Division of Neurology, University Medicine Cluster, National University Health System, Singapore, Singapore
- Department of Medicine, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore
| | - Effie Chew
- Department of Medicine, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore
- Division of Rehabilitation Medicine, Department of Medicine, National University Health System, Singapore, Singapore
| | - John E Desmond
- The Johns Hopkins University School of Medicine, Baltimore, USA
| | - S H Annabel Chen
- Psychology, School of Social Sciences, Nanyang Technological University, Singapore, Singapore.
- National Institute of Education, Nanyang Technological University, Singapore, Singapore.
- Centre for Research and Development in Learning (CRADLE), Nanyang Technological University, Singapore, Singapore.
- Lee Kong Chian School of Medicine (LKCMedicine), Nanyang Technological University, Singapore, Singapore.
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Berenbaum JG, Nadkarni PA, Marvel CL. An fMRI analysis of verbal and non-verbal working memory in people with a past history of opioid dependence. Front Neurosci 2023; 17:1053500. [PMID: 37090800 PMCID: PMC10113507 DOI: 10.3389/fnins.2023.1053500] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2022] [Accepted: 03/20/2023] [Indexed: 04/07/2023] Open
Abstract
Introduction Working memory describes the ability to maintain and manipulate information held in mind, and it is a fundamental aspect of executive function. Within drug addiction, impairments of executive control over behavior are thought to lead to poor decision making and risky behaviors. Previous research has demonstrated working memory (WM) and executive function difficulties in opioid-dependent individuals, but the neural underpinnings of such impairments in this population are not well understood. Methods This study used functional magnetic resonance imaging to examine the neural mechanisms involved in WM in 13 opioid-dependent, methadone-maintained participants (OP) and 13 matched, healthy controls (HC). A Sternberg item-recognition task was administered with three conditions: (1) a "verbal" condition in which participants determined whether any six visually presented target letters matched a probe item that was presented 4-6 s later, (2) a "non-verbal" condition in which participants were presented with a Chinese character and, following a 4-6 s delay, determined whether the character matched the probe item, and (3) a "control" condition in which participants were presented with three horizontal lines and following the same delay, determined whether the lines matched a probe item (always the same three lines). Functional magnetic resonance imaging (fMRI) contrasts focused on the delay (or "maintenance") phase for verbal and non-verbal conditions relative to the control condition. Results Accuracy on the WM task did not differ between groups, but the OP group was significantly slower to respond. The fMRI imaging results indicated differences in brain activity between the OP and HC groups. fMRI-guided regions of interest correlated with age of first alcohol and THC use, suggesting that early substance use, in addition to years of opioid-abuse, may have played a role in the OP group's WM performance. Discussion A deeper understanding of these neural differences between opioid-dependent individuals and their healthy control counterparts helps shed light on fundamental ways in which substance use impacts the brain and cognition, potentially opening up novel avenues for therapeutic targets to treat substance use disorder.
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Affiliation(s)
| | | | - Cherie L. Marvel
- Department of Neurology, Johns Hopkins University School of Medicine, Baltimore, MD, United States
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Delay activity during visual working memory: A meta-analysis of 30 fMRI experiments. Neuroimage 2022; 255:119204. [PMID: 35427771 DOI: 10.1016/j.neuroimage.2022.119204] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2021] [Revised: 04/04/2022] [Accepted: 04/08/2022] [Indexed: 01/22/2023] Open
Abstract
Visual working memory refers to the temporary maintenance and manipulation of task-related visual information. Recent debate on the underlying neural substrates of visual working memory has focused on the delay period of relevant tasks. Persistent neural activity throughout the delay period has been recognized as a correlate of working memory, yet regions demonstrating sustained hemodynamic responses show inconsistency across individual studies. To develop a more precise understanding of delay-period activations during visual working memory, we conducted a coordinate-based meta-analysis on 30 fMRI experiments involving 515 healthy adults with a mean age of 25.65 years. The main analysis revealed a widespread frontoparietal network associated with delay-period activity, as well as activation in the right inferior temporal cortex. These findings were replicated using different meta-analytical algorithms and were shown to be robust against between-study heterogeneity and publication bias. Further meta-analyses on different subgroups of experiments with specific task demands and stimulus types revealed similar delay-period networks, with activations distributed across the frontal and parietal cortices. The roles of prefrontal regions, posterior parietal regions, and inferior temporal areas are reviewed and discussed in the context of content-specific storage. We conclude that cognitive operations that occur during the unfilled delay period in visual working memory tasks can be flexibly expressed across a frontoparietal-temporal network depending on experimental parameters.
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Sisakhti M, Sachdev PS, Batouli SAH. The Effect of Cognitive Load on the Retrieval of Long-Term Memory: An fMRI Study. Front Hum Neurosci 2021; 15:700146. [PMID: 34720904 PMCID: PMC8548369 DOI: 10.3389/fnhum.2021.700146] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2021] [Accepted: 09/22/2021] [Indexed: 12/02/2022] Open
Abstract
One of the less well-understood aspects of memory function is the mechanism by which the brain responds to an increasing load of memory, either during encoding or retrieval. Identifying the brain structures which manage this increasing cognitive demand would enhance our knowledge of human memory. Despite numerous studies about the effect of cognitive loads on working memory processes, whether these can be applied to long-term memory processes is unclear. We asked 32 healthy young volunteers to memorize all possible details of 24 images over a 12-day period ending 2 days before the fMRI scan. The images were of 12 categories relevant to daily events, with each category including a high and a low load image. Behavioral assessments on a separate group of participants (#22) provided the average loads of the images. The participants had to retrieve these previously memorized images during the fMRI scan in 15 s, with their eyes closed. We observed seven brain structures showing the highest activation with increasing load of the retrieved images, viz. parahippocampus, cerebellum, superior lateral occipital, fusiform and lingual gyri, precuneus, and posterior cingulate gyrus. Some structures showed reduced activation when retrieving higher load images, such as the anterior cingulate, insula, and supramarginal and postcentral gyri. The findings of this study revealed that the mechanism by which a difficult-to-retrieve memory is handled is mainly by elevating the activation of the responsible brain areas and not by getting other brain regions involved, which is a help to better understand the LTM retrieval process in the human brain.
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Affiliation(s)
- Minoo Sisakhti
- Institute for Cognitive Sciences Studies, Tehran, Iran.,Neuroimaging and Analysis Group, Research Center for Molecular and Cellular Imaging, Tehran University of Medical Sciences, Tehran, Iran
| | - Perminder S Sachdev
- Centre for Healthy Brain Aging (CHeBA), School of Psychiatry, University of New South Wales, Sydney, NSW, Australia
| | - Seyed Amir Hossein Batouli
- Neuroimaging and Analysis Group, Research Center for Molecular and Cellular Imaging, Tehran University of Medical Sciences, Tehran, Iran.,Department of Neuroscience and Addiction Studies, School of Advanced Technologies in Medicine, Tehran University of Medical Sciences, Tehran, Iran
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Dominguez J, de Guzman MF, Chen SHA, Sano M, Waldemar G, Phung TKT. Filipino Multicomponent Intervention to Maintain Cognitive Performance in High-Risk Population (FINOMAIN): Study Protocol for a Cluster Randomized Controlled Trial. Front Neurol 2021; 12:685721. [PMID: 34557142 PMCID: PMC8453078 DOI: 10.3389/fneur.2021.685721] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2021] [Accepted: 07/20/2021] [Indexed: 12/03/2022] Open
Abstract
Background: More than half of the people with dementia live in lower-middle income countries (LMIC), yet we lack research and evidence-based knowledge to guide health promotion and prevention strategies for cognitive decline. In the Philippines, the prevalence of mild cognitive impairment (MCI) and cardiovascular risk factors among older persons are high, making this population at high risk for developing dementia. This protocol describes a cluster randomized controlled trial that aims to investigate the efficacy of a multicomponent intervention to maintain cognitive performance among high-risk population. Methods: This is a cluster-randomized, two-arm, single-blind trial of a multicomponent intervention that combines dance called INDAK (Improving Neurocognition through Dance and Kinesthetics), nutrition counseling, and vascular risk management. The intervention arm will receive 12 months (1-h, twice per week) of INDAK and every 3 months of nutrition counseling and intensive vascular risk management and monitoring. The control group will receive the usual vascular care advice and referral. A total of 605 (20-25 clusters per arm) community-dwelling Filipino older adults aged ≥ 60 years old with MCI will participate in the study and will be assessed at baseline, 6th- and 12th-month follow-up. The primary outcome is cognitive performance assessed by the Alzheimer's Disease Assessment Scale-Cognitive (ADAS-Cog), Mnemonic Similarity Tasks (MST), and executive function composite (EFC). Secondary outcomes are functional connectivity assessed through brain imaging, and measures of behavioral, functional level, and quality of life. Discussion: The study aims to provide scientific evidence on a public health intervention that is contextualized in a community setting to reduce dementia risk among older adults with MCI. This model can be an ecological, low-cost, and effective program, thereby conducive to widespread implementation in the Philippines as well as in other low-resource settings with similar public health challenges. The pilot phase was underway with eight villages (clusters), but temporarily interrupted by the pandemic. The full study is anticipated to start after community restrictions are eased.
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Affiliation(s)
- Jacqueline Dominguez
- St. Luke's Medical Center, Institute for Neurosciences, Quezon City, Philippines
- Institute for Dementia Care Asia, Quezon City, Philippines
| | | | - S. H. Annabel Chen
- Center of Research and Development in Learning, Psychology, School of Social Sciences, Lee Kong Chian School of Medicine, Nanyang Technological University, Singapore, Singapore
| | - Mary Sano
- Department of Psychiatry, Mt. Sinai Alzheimer's Disease Research Center, Icahn School of Medicine, New York, NY, United States
| | - Gunhild Waldemar
- Danish Dementia Research Center, Rigohospitalet, University of Copenhagen, Copenhagen, Denmark
- Department of Clinical Medicine, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark
| | - Thien Kieu Thi Phung
- Danish Dementia Research Center, Rigohospitalet, University of Copenhagen, Copenhagen, Denmark
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Xiao Y, Lin Y, Ma J, Qian J, Ke Z, Li L, Yi Y, Zhang J, Dai Z. Predicting visual working memory with multimodal magnetic resonance imaging. Hum Brain Mapp 2021; 42:1446-1462. [PMID: 33277955 PMCID: PMC7927291 DOI: 10.1002/hbm.25305] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2020] [Revised: 11/18/2020] [Accepted: 11/21/2020] [Indexed: 12/15/2022] Open
Abstract
The indispensability of visual working memory (VWM) in human daily life suggests its importance in higher cognitive functions and neurological diseases. However, despite the extensive research efforts, most findings on the neural basis of VWM are limited to a unimodal context (either structure or function) and have low generalization. To address the above issues, this study proposed the usage of multimodal neuroimaging in combination with machine learning to reveal the neural mechanism of VWM across a large cohort (N = 547). Specifically, multimodal magnetic resonance imaging features extracted from voxel-wise amplitude of low-frequency fluctuations, gray matter volume, and fractional anisotropy were used to build an individual VWM capacity prediction model through a machine learning pipeline, including the steps of feature selection, relevance vector regression, cross-validation, and model fusion. The resulting model exhibited promising predictive performance on VWM (r = .402, p < .001), and identified features within the subcortical-cerebellum network, default mode network, motor network, corpus callosum, anterior corona radiata, and external capsule as significant predictors. The main results were then compared with those obtained on emotional regulation and fluid intelligence using the same pipeline, confirming the specificity of our findings. Moreover, the main results maintained well under different cross-validation regimes and preprocess strategies. These findings, while providing richer evidence for the importance of multimodality in understanding cognitive functions, offer a solid and general foundation for comprehensively understanding the VWM process from the top down.
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Affiliation(s)
- Yu Xiao
- Department of PsychologySun Yat‐sen UniversityGuangzhouChina
| | - Ying Lin
- Department of PsychologySun Yat‐sen UniversityGuangzhouChina
| | - Junji Ma
- Department of PsychologySun Yat‐sen UniversityGuangzhouChina
| | - Jiehui Qian
- Department of PsychologySun Yat‐sen UniversityGuangzhouChina
| | - Zijun Ke
- Department of PsychologySun Yat‐sen UniversityGuangzhouChina
| | - Liangfang Li
- Department of PsychologySun Yat‐sen UniversityGuangzhouChina
| | - Yangyang Yi
- Department of PsychologySun Yat‐sen UniversityGuangzhouChina
| | - Jinbo Zhang
- Department of PsychologySun Yat‐sen UniversityGuangzhouChina
| | - Cam‐CAN
- Cambridge Centre for Ageing and Neuroscience (Cam‐CAN)University of Cambridge and MRC Cognition and Brain Sciences UnitCambridgeUK
| | - Zhengjia Dai
- Department of PsychologySun Yat‐sen UniversityGuangzhouChina
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Pan P, Wei S, Ou Y, Liu F, Li H, Jiang W, Li W, Lei Y, Guo W, Luo S. Reduced Global-Brain Functional Connectivity of the Cerebello-Thalamo-Cortical Network in Patients With Dry Eye Disease. Front Hum Neurosci 2020; 14:572693. [PMID: 33100998 PMCID: PMC7546321 DOI: 10.3389/fnhum.2020.572693] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2020] [Accepted: 08/24/2020] [Indexed: 12/11/2022] Open
Abstract
Background: The pathophysiology of patients with dry eye disease (DED) is associated with abnormal functional connectivity (FC). The present study aims to probe alterations of voxel-wise brain-wide FC in patient with DED at rest in an unbiased way. Method: A total of 20 patients with DED and 23 controls matched by age, sex, and years of education underwent resting-state functional magnetic resonance imaging scans. Global-brain FC (GFC) was adopted to analyze the images. Support vector machine (SVM) was utilized to differentiate the patients from the controls. Results: Compared with the controls, patients with DED exhibited decreased GFC in the right cerebellum lobule VIII/inferior semi-lunar lobule and left thalamus that belonged to the cerebello-thalamo-cortical network. The GFC values in the left thalamus were positively correlated to the illness duration (r = 0.589, p = 0.006) in the patients. Decreased GFC values in the left thalamus could be used to discriminate the patients from the controls with optimal accuracy, sensitivity and specificity (88.37, 85.00, and 91.30%). Conclusions: Our findings indicate that decreased GFC in the brain regions associated with cerebello-thalamo-cortical network may provide a new insight for understanding the pathological changes of FC in DED. GFC values in the left thalamus may be utilized as a potential biomarker to identify the patients from the controls.
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Affiliation(s)
- Pan Pan
- National Clinical Research Center for Mental Disorders, and Department of Psychiatry, The Second Xiangya Hospital of Central South University, Changsha, China
| | - Shubao Wei
- Department of Neurology, The First Affiliated Hospital of Guangxi Medical University, Nanning, China
| | - Yangpan Ou
- National Clinical Research Center for Mental Disorders, and Department of Psychiatry, The Second Xiangya Hospital of Central South University, Changsha, China
| | - Feng Liu
- Department of Radiology, Tianjin Medical University General Hospital, Tianjin, China
| | - Huabing Li
- Department of Radiology, The Second Xiangya Hospital of Central South University, Changsha, China
| | - Wenyan Jiang
- Department of Neurology, The First Affiliated Hospital of Guangxi Medical University, Nanning, China
| | - Wenmei Li
- Department of Radiology, The First Affiliated Hospital of Guangxi Medical University, Nanning, China
| | - Yiwu Lei
- Department of Radiology, The First Affiliated Hospital of Guangxi Medical University, Nanning, China
| | - Wenbin Guo
- National Clinical Research Center for Mental Disorders, and Department of Psychiatry, The Second Xiangya Hospital of Central South University, Changsha, China.,The Third People's Hospital of Foshan, Foshan, China
| | - Shuguang Luo
- Department of Neurology, The First Affiliated Hospital of Guangxi Medical University, Nanning, China
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Gao M, Shao R, Huang CM, Liu HL, Chen YL, Lee SH, Lin C, Lee TM. The relationship between loneliness and working-memory-related frontoparietal network connectivity in people with major depressive disorder. Behav Brain Res 2020; 393:112776. [DOI: 10.1016/j.bbr.2020.112776] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2020] [Revised: 05/24/2020] [Accepted: 06/01/2020] [Indexed: 02/03/2023]
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12
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Ung WC, Yap KH, Ebenezer EGM, Chin PS, Nordin N, Chan SC, Yip HL, Lu CK, Kiguchi M, Tang TB. Assessing Neural Compensation With Visuospatial Working Memory Load Using Near-Infrared Imaging. IEEE Trans Neural Syst Rehabil Eng 2019; 28:13-22. [PMID: 31794398 DOI: 10.1109/tnsre.2019.2956459] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Alzheimer's disease is characterized by the progressive deterioration of cognitive abilities particularly working memory while mild cognitive impairment (MCI) represents its prodrome. It is generally believed that neural compensation is intact in MCI but absent in Alzheimer's disease. This study investigated the effects of increasing task load as a means to induce neural compensation through a novel visual working memory (VSWM) task using functional near-infrared spectroscopy (fNIRS). The bilateral prefrontal cortex (PFC) was explored due to its relevance in VSWM and neural compensation. A total of 31 healthy controls (HC), 12 patients with MCI and 18 patients with mild Alzheimer's disease (mAD) were recruited. Although all groups showed sensitivity in terms of behavioral performance (i.e. score) towards increasing task load (level 1 to 3), only in MCI load effect on cortical response (as measured by fNIRS) was significant. At lower task load, bilateral PFC activation did not differ between MCI and HC. Neural compensation in the form of hyperactivation was only noticeable in MCI with a moderate task load. Lack of hyperactivation in mAD, coupled with significantly poorer task performance across task loads, suggested the inability to compensate due to a greater degree of neurodegeneration. Our findings provided an insight into the interaction of cognitive load theory and neural compensatory mechanisms. The experiment results demonstrated the feasibility of inducing neural compensation with the proposed VSWM task at the right amount of cognitive load. This may provide a promising avenue to develop an effective cognitive training and rehabilitation for dementia population.
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13
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Sobczak-Edmans M, Lo YC, Hsu YC, Chen YJ, Kwok FY, Chuang KH, Tseng WYI, Chen SHA. Cerebro-Cerebellar Pathways for Verbal Working Memory. Front Hum Neurosci 2019; 12:530. [PMID: 30670957 PMCID: PMC6333010 DOI: 10.3389/fnhum.2018.00530] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2018] [Accepted: 12/13/2018] [Indexed: 11/26/2022] Open
Abstract
The current study examined the structural and functional connectivity of the cerebro-cerebellar network of verbal working memory as proposed by Chen and Desmond (2005a). Diffusion spectrum imaging was employed to establish structural connectivity between cerebro-cerebellar regions co-activated during a verbal working memory task. The inferior frontal gyrus, inferior parietal lobule, pons, thalamus, superior cerebellum and inferior cerebellum were used as regions of interest to reconstruct and segment the contralateral white matter cerebro-cerebellar circuitry. The segmented pathways were examined further to establish the relationship between structural and effective connectivity as well as the relationship between structural connectivity and verbal working memory performance. No direct relationship between structural and effective connectivity was found but the results demonstrated that structural connectivity is indirectly related to effective connectivity as DCM models that resembled more closely with underlying white matter pathways had a higher degree of model inference confidence. Additionally, it was demonstrated that the structural connectivity of the ponto-cerebellar tract was associated with individual differences in response time for verbal working memory. The findings of the study contribute to further our understanding of the relationship between structural and functional connectivity and the impact of variability in verbal working memory performance.
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Affiliation(s)
| | - Yu-Chun Lo
- Graduate Institute of Neural Regenerative Medicine, College of Medical Science and Technology, Taipei Medical University, Taipei, Taiwan.,Institute of Medical Device and Imaging, National Taiwan University College of Medicine, Taipei, Taiwan
| | - Yung-Chin Hsu
- Institute of Medical Device and Imaging, National Taiwan University College of Medicine, Taipei, Taiwan
| | - Yu-Jen Chen
- Institute of Medical Device and Imaging, National Taiwan University College of Medicine, Taipei, Taiwan
| | - Fu Yu Kwok
- Centre for Research in Child Development, National Institute of Education, Nanyang Technological University, Singapore, Singapore
| | - Kai-Hsiang Chuang
- The Queensland Brain Institute, The University of Queensland, Brisbane, QLD, Australia.,The Centre for Advanced Imaging, The University of Queensland, Brisbane, QLD, Australia
| | - Wen-Yih Isaac Tseng
- Institute of Medical Device and Imaging, National Taiwan University College of Medicine, Taipei, Taiwan.,Institute of Brain and Mind Sciences, National Taiwan University College of Medicine, Taipei, Taiwan.,Department of Radiology, National Taiwan University College of Medicine, Taipei, Taiwan.,Molecular Imaging Center, National Taiwan University, Taipei, Taiwan
| | - S H Annabel Chen
- Psychology, School of Social Sciences, Nanyang Technological University, Singapore, Singapore.,Lee Kong Chian School of Medicine, Nanyang Technological University, Singapore, Singapore.,Centre for Research and Development in Learning, Nanyang Technological University, Singapore, Singapore
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14
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Deverett B, Koay SA, Oostland M, Wang SSH. Cerebellar involvement in an evidence-accumulation decision-making task. eLife 2018; 7:36781. [PMID: 30102151 PMCID: PMC6105309 DOI: 10.7554/elife.36781] [Citation(s) in RCA: 43] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2018] [Accepted: 08/11/2018] [Indexed: 12/18/2022] Open
Abstract
To make successful evidence-based decisions, the brain must rapidly and accurately transform sensory inputs into specific goal-directed behaviors. Most experimental work on this subject has focused on forebrain mechanisms. Using a novel evidence-accumulation task for mice, we performed recording and perturbation studies of crus I of the lateral posterior cerebellum, which communicates bidirectionally with numerous forebrain regions. Cerebellar inactivation led to a reduction in the fraction of correct trials. Using two-photon fluorescence imaging of calcium, we found that Purkinje cell somatic activity contained choice/evidence-related information. Decision errors were represented by dendritic calcium spikes, which in other contexts are known to drive cerebellar plasticity. We propose that cerebellar circuitry may contribute to computations that support accurate performance in this perceptual decision-making task.
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Affiliation(s)
- Ben Deverett
- Department of Molecular Biology, Princeton University, Princeton, United States.,Princeton Neuroscience Institute, Princeton University, Princeton, United States.,Rutgers Robert Wood Johnson Medical School, Piscataway, United States
| | - Sue Ann Koay
- Princeton Neuroscience Institute, Princeton University, Princeton, United States
| | - Marlies Oostland
- Princeton Neuroscience Institute, Princeton University, Princeton, United States
| | - Samuel S-H Wang
- Department of Molecular Biology, Princeton University, Princeton, United States.,Princeton Neuroscience Institute, Princeton University, Princeton, United States
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15
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Proskovec AL, Wiesman AI, Heinrichs-Graham E, Wilson TW. Beta Oscillatory Dynamics in the Prefrontal and Superior Temporal Cortices Predict Spatial Working Memory Performance. Sci Rep 2018; 8:8488. [PMID: 29855522 PMCID: PMC5981644 DOI: 10.1038/s41598-018-26863-x] [Citation(s) in RCA: 36] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2018] [Accepted: 05/22/2018] [Indexed: 01/28/2023] Open
Abstract
The oscillatory dynamics serving spatial working memory (SWM), and how such dynamics relate to performance, are poorly understood. To address these topics, the present study recruited 22 healthy adults to perform a SWM task during magnetoencephalography (MEG). The resulting MEG data were transformed into the time-frequency domain, and significant oscillatory responses were imaged using a beamformer. Voxel time series data were extracted from the cluster peaks to quantify the dynamics, while whole-brain partial correlation maps were computed to identify regions where oscillatory strength varied with accuracy on the SWM task. The results indicated transient theta oscillations in spatially distinct subregions of the prefrontal cortices at the onset of encoding and maintenance, which may underlie selection of goal-relevant information. Additionally, strong and persistent decreases in alpha and beta oscillations were observed throughout encoding and maintenance in parietal, temporal, and occipital regions, which could serve sustained attention and maintenance processes during SWM performance. The neuro-behavioral correlations revealed that beta activity within left dorsolateral prefrontal control regions and bilateral superior temporal integration regions was negatively correlated with SWM accuracy. Notably, this is the first study to employ a whole-brain approach to significantly link neural oscillations to behavioral performance in the context of SWM.
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Affiliation(s)
- Amy L Proskovec
- Department of Psychology, University of Nebraska - Omaha, Omaha, NE, USA.,Center for Magnetoencephalography, University of Nebraska Medical Center (UNMC), Omaha, NE, USA.,Department of Neurological Sciences, UNMC, Omaha, NE, USA
| | - Alex I Wiesman
- Center for Magnetoencephalography, University of Nebraska Medical Center (UNMC), Omaha, NE, USA.,Department of Neurological Sciences, UNMC, Omaha, NE, USA
| | - Elizabeth Heinrichs-Graham
- Center for Magnetoencephalography, University of Nebraska Medical Center (UNMC), Omaha, NE, USA.,Department of Neurological Sciences, UNMC, Omaha, NE, USA
| | - Tony W Wilson
- Department of Psychology, University of Nebraska - Omaha, Omaha, NE, USA. .,Center for Magnetoencephalography, University of Nebraska Medical Center (UNMC), Omaha, NE, USA. .,Department of Neurological Sciences, UNMC, Omaha, NE, USA.
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16
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Saggar M, Quintin EM, Bott NT, Kienitz E, Chien YH, Hong DWC, Liu N, Royalty A, Hawthorne G, Reiss AL. Changes in Brain Activation Associated with Spontaneous Improvization and Figural Creativity After Design-Thinking-Based Training: A Longitudinal fMRI Study. Cereb Cortex 2018; 27:3542-3552. [PMID: 27307467 DOI: 10.1093/cercor/bhw171] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Creativity is widely recognized as an essential skill for entrepreneurial success and adaptation to daily-life demands. However, we know little about the neural changes associated with creative capacity enhancement. For the first time, using a prospective, randomized control design, we examined longitudinal changes in brain activity associated with participating in a five-week design-thinking-based Creative Capacity Building Program (CCBP), when compared with Language Capacity Building Program (LCBP). Creativity, an elusive and multifaceted construct, is loosely defined as an ability to produce useful/appropriate and novel outcomes. Here, we focus on one of the facets of creative thinking-spontaneous improvization. Participants were assessed pre- and post-intervention for spontaneous improvization skills using a game-like figural Pictionary-based fMRI task. Whole-brain group-by-time interaction revealed reduced task-related activity in CCBP participants (compared with LCBP participants) after training in the right dorsolateral prefrontal cortex, anterior/paracingulate gyrus, supplementary motor area, and parietal regions. Further, greater cerebellar-cerebral connectivity was observed in CCBP participants at post-intervention when compared with LCBP participants. In sum, our results suggest that improvization-based creative capacity enhancement is associated with reduced engagement of executive functioning regions and increased involvement of spontaneous implicit processing.
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Affiliation(s)
- Manish Saggar
- Center for Interdisciplinary Brain Sciences Research, Department of Psychiatry and Behavioral Sciences, Stanford University School of Medicine, 401 Quarry Road, Stanford, CA 94305, USA
| | - Eve-Marie Quintin
- Center for Interdisciplinary Brain Sciences Research, Department of Psychiatry and Behavioral Sciences, Stanford University School of Medicine, 401 Quarry Road, Stanford, CA 94305, USA
| | - Nicholas T Bott
- Center for Interdisciplinary Brain Sciences Research, Department of Psychiatry and Behavioral Sciences, Stanford University School of Medicine, 401 Quarry Road, Stanford, CA 94305, USA.,Pacific Graduate School of Psychology-Stanford University Psy.D. Consortium, 1791 Arastradero Road, Palo Alto, CA 94304, USA
| | - Eliza Kienitz
- Center for Interdisciplinary Brain Sciences Research, Department of Psychiatry and Behavioral Sciences, Stanford University School of Medicine, 401 Quarry Road, Stanford, CA 94305, USA.,Pacific Graduate School of Psychology-Stanford University Psy.D. Consortium, 1791 Arastradero Road, Palo Alto, CA 94304, USA
| | - Yin-Hsuan Chien
- Center for Interdisciplinary Brain Sciences Research, Department of Psychiatry and Behavioral Sciences, Stanford University School of Medicine, 401 Quarry Road, Stanford, CA 94305, USA.,Department of Pediatrics, Taipei City Hospital Zhong-Xing Branch, No. 145 Zhengzhou Rd, Datong area, Taipei, Taiwan
| | - Daniel W-C Hong
- Institute of Biomedical Engineering, National Taiwan University, No. 1, Sec. 4, Roosevelt Road, Taipei 10617, Taiwan
| | - Ning Liu
- Center for Interdisciplinary Brain Sciences Research, Department of Psychiatry and Behavioral Sciences, Stanford University School of Medicine, 401 Quarry Road, Stanford, CA 94305, USA
| | - Adam Royalty
- Hasso Plattner Institute of Design, Stanford University, Building 550, 416 Escondido Mall, Stanford, CA 94305, USA
| | - Grace Hawthorne
- Hasso Plattner Institute of Design, Stanford University, Building 550, 416 Escondido Mall, Stanford, CA 94305, USA
| | - Allan L Reiss
- Center for Interdisciplinary Brain Sciences Research, Department of Psychiatry and Behavioral Sciences, Stanford University School of Medicine, 401 Quarry Road, Stanford, CA 94305, USA.,Department of Radiology, Stanford University School of Medicine, 300 Pasteur Road, Stanford, CA 94305, USA
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17
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Archer JA, Lee A, Qiu A, Chen SHA. Working memory, age and education: A lifespan fMRI study. PLoS One 2018; 13:e0194878. [PMID: 29584781 PMCID: PMC5870997 DOI: 10.1371/journal.pone.0194878] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2017] [Accepted: 03/12/2018] [Indexed: 12/15/2022] Open
Abstract
Ageing is associated with grey matter atrophy and changes in task-related neural activations. This study investigated the effects of age and education on neural activation during a spatial working memory task in 189 participants aged between 20–80 years old, whilst controlling for grey matter density. Age was related to linear decreases in neural activation in task activated areas, and this effect was no longer significant when adjusting for education or accuracy. Age was also related to cubic increases in neural activation in non-task related areas, such as the temporal gyrus, cuneus and cerebellum when adjusting for accuracy and education. These findings support previous lifespan datasets indicating linear age-related decreases in task activation, but non-linear increases in non-task related areas during episodic memory tasks. The findings also support past studies indicating education offers a form of cognitive reserve through providing a form of neural compensation and highlights the need to consider education in ageing studies.
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Affiliation(s)
- Jo A. Archer
- Psychology, Nanyang Technological University, Singapore, Singapore
| | - Annie Lee
- Department of Biomedical Engineering, National University of Singapore, Singapore, Singapore
| | - Anqi Qiu
- Department of Biomedical Engineering, National University of Singapore, Singapore, Singapore
- Clinical Imaging Research Centre, National University of Singapore, Singapore, Singapore
- Singapore Institute for Clinical Sciences, the Agency for Science, Technology and Research, Singapore, Singapore
| | - S-H Annabel Chen
- Psychology, Nanyang Technological University, Singapore, Singapore
- Centre for Research and Development in Learning, Nanyang Technological University, Singapore, Singapore
- Lee Kong Chian School of Medicine, Nanyang Technological University, Singapore, Singapore
- * E-mail:
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18
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Cocozza S, Petracca M, Mormina E, Buyukturkoglu K, Podranski K, Heinig MM, Pontillo G, Russo C, Tedeschi E, Russo CV, Costabile T, Lanzillo R, Harel A, Klineova S, Miller A, Brunetti A, Morra VB, Lublin F, Inglese M. Cerebellar lobule atrophy and disability in progressive MS. J Neurol Neurosurg Psychiatry 2017; 88:1065-1072. [PMID: 28844067 DOI: 10.1136/jnnp-2017-316448] [Citation(s) in RCA: 45] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/16/2017] [Revised: 07/10/2017] [Accepted: 07/23/2017] [Indexed: 01/29/2023]
Abstract
OBJECTIVE To investigate global and lobular cerebellar volumetries in patients with progressive multiple sclerosis (MS), testing the contribution of cerebellar lobular atrophy to both motor and cognitive performances. METHODS Eighty-two patients with progressive MS and 46 healthy controls (HC) were enrolled in this cross-sectional study. Clinical evaluation included motor and cognitive testing: Expanded Disability Status Scale, cerebellar Functional System score, Timed 25-Foot Walk Test, 9-Hole Peg Test (9-HPT), Symbol Digit Modalities Test (SDMT), Brief Visuospatial Memory Test-Revised (BVMT) and California Verbal Learning Test II (CVLT). Cerebellar volumes were automatically obtained using the Spatially Unbiased Infratentorial Toolbox. A hierarchical multiple linear regression analysis was performed to assess the relationship between MRI variables of supratentorial and cerebellar damage (grey matter fraction, T2 lesion volume, metrics of cerebellar atrophy and cerebellar lesion volume) and motor/cognitive scores. RESULTS Patients with MS exhibited lower cerebellar volumes compared with HC. Regression analysis showed that cerebellar metrics accounted for extra variance in both motor and cognitive performances, with cerebellar lesion volume, cerebellar Lobules VI, Crus I and VIIIa atrophy being independent predictors of 9-HPT, SDMT, BVMT and CVLT performances. CONCLUSIONS Atrophy of specific cerebellar lobules explains different aspects of motor and cognitive disability in patients with progressive MS. Investigation of cerebellar involvement provides further insight into the pathophysiological basis of clinical disability in progressive MS.
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Affiliation(s)
- Sirio Cocozza
- Department of Neurology, Icahn School of Medicine at Mount Sinai, New York, USA.,Department of Advanced Biomedical Sciences, University 'Federico II', Naples, Italy
| | - Maria Petracca
- Department of Neurology, Icahn School of Medicine at Mount Sinai, New York, USA.,Department of Neurosciences, Reproductive and Odonto-stomatological Sciences, University 'Federico II', Naples, Italy
| | - Enricomaria Mormina
- Department of Neurology, Icahn School of Medicine at Mount Sinai, New York, USA.,Department of Biomedical Sciences and Morphological and Functional Images, University of Messina, Messina, Italy
| | | | - Kornelius Podranski
- Department of Neurology, Icahn School of Medicine at Mount Sinai, New York, USA
| | - Monika M Heinig
- Department of Neurology, Icahn School of Medicine at Mount Sinai, New York, USA
| | - Giuseppe Pontillo
- Department of Advanced Biomedical Sciences, University 'Federico II', Naples, Italy
| | - Camilla Russo
- Department of Advanced Biomedical Sciences, University 'Federico II', Naples, Italy
| | - Enrico Tedeschi
- Department of Advanced Biomedical Sciences, University 'Federico II', Naples, Italy
| | - Cinzia Valeria Russo
- Department of Neurosciences, Reproductive and Odonto-stomatological Sciences, University 'Federico II', Naples, Italy
| | - Teresa Costabile
- Department of Neurosciences, Reproductive and Odonto-stomatological Sciences, University 'Federico II', Naples, Italy
| | - Roberta Lanzillo
- Department of Neurosciences, Reproductive and Odonto-stomatological Sciences, University 'Federico II', Naples, Italy
| | - Asaff Harel
- Department of Neurology, Icahn School of Medicine at Mount Sinai, New York, USA
| | - Sylvia Klineova
- Department of Neurology, Icahn School of Medicine at Mount Sinai, New York, USA
| | - Aaron Miller
- Department of Neurology, Icahn School of Medicine at Mount Sinai, New York, USA
| | - Arturo Brunetti
- Department of Advanced Biomedical Sciences, University 'Federico II', Naples, Italy
| | - Vincenzo Brescia Morra
- Department of Neurosciences, Reproductive and Odonto-stomatological Sciences, University 'Federico II', Naples, Italy
| | - Fred Lublin
- Department of Neurology, Icahn School of Medicine at Mount Sinai, New York, USA
| | - Matilde Inglese
- Departments of Neurology, Radiology and Neuroscience, Icahn School of Medicine, New York, USA.,Department of Neuroscience, Rehabilitation, Ophthalmology, Genetics and Maternal and Perinatal Sciences, University of Genoa, Genova, Italy.,IRCCS Azienda Ospedale Università San Martino-IST, Genova, Italy
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19
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Göbel A, Heldmann M, Sartorius A, Göttlich M, Dirk AL, Brabant G, Münte TF. Mild Thyrotoxicosis Leads to Brain Perfusion Changes: An Arterial Spin Labelling Study. J Neuroendocrinol 2017; 29. [PMID: 27859916 DOI: 10.1111/jne.12446] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/11/2016] [Revised: 10/12/2016] [Accepted: 11/05/2016] [Indexed: 11/29/2022]
Abstract
Hypo- and hyperthyroidism have effects on brain structure and function, as well as cognitive processes, including memory. However, little is known about the influence of thyroid hormones on brain perfusion and the relationship of such perfusion changes with cognition. The present study aimed to demonstrate the effect of short-term experimental hyperthyroidism on brain perfusion in healthy volunteers and to assess whether perfusion changes, if present, are related to cognitive performance. It is known that an interaction exists between brain perfusion and cerebral oxygen consumption rate and it is considered that neural activation increases cerebral regional perfusion rate in brain areas associated with memory. Measuring cerebral blood flow may therefore represent a proxy for neural activity. Therefore, arterial spin labelling (ASL) measurements were conducted and later analysed to evaluate brain perfusion in 29 healthy men before and after ingesting thyroid hormones for 8 weeks. Psychological tests concerning memory were performed at the same time-points and the results were correlated with the imaging results. In the hyperthyroid condition, perfusion was increased in the posterior cerebellum in regions connected with cerebral networks associated with cognitive control and the visual cortex compared to the euthyroid condition. In addition, these perfusion changes were positively correlated with changes of performance in the German version of the Auditory Verbal Learning Task [AVLT, Verbaler Lern-und-Merkfähigkeits-Test (VLMT)]. Cerebellar perfusion and function therefore appears to be modulated by thyroid hormones, likely because the cerebellum hosts a high number of thyroid hormone receptors.
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Affiliation(s)
- A Göbel
- Department of Neurology, University of Lübeck, Lübeck, Germany
| | - M Heldmann
- Department of Neurology, University of Lübeck, Lübeck, Germany
- Institute of Psychology II, University of Lübeck, Lübeck, Germany
| | - A Sartorius
- Central Institute of Mental Health, Mannheim, Germany
| | - M Göttlich
- Department of Neurology, University of Lübeck, Lübeck, Germany
| | - A-L Dirk
- Department of Internal Medicine I, University of Lübeck, Lübeck, Germany
| | - G Brabant
- Department of Internal Medicine I, University of Lübeck, Lübeck, Germany
| | - T F Münte
- Department of Neurology, University of Lübeck, Lübeck, Germany
- Institute of Psychology II, University of Lübeck, Lübeck, Germany
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20
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Ng HBT, Kao KLC, Chan YC, Chew E, Chuang KH, Chen SHA. Modality specificity in the cerebro-cerebellar neurocircuitry during working memory. Behav Brain Res 2016; 305:164-73. [PMID: 26930173 DOI: 10.1016/j.bbr.2016.02.027] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2015] [Revised: 02/22/2016] [Accepted: 02/24/2016] [Indexed: 12/20/2022]
Abstract
Previous studies have suggested cerebro-cerebellar circuitry in working memory. The present fMRI study aims to distinguish differential cerebro-cerebellar activation patterns in verbal and visual working memory, and employs a quantitative analysis to deterimine lateralization of the activation patterns observed. Consistent with Chen and Desmond (2005a,b) predictions, verbal working memory activated a cerebro-cerebellar circuitry that comprised left-lateralized language-related brain regions including the inferior frontal and posterior parietal areas, and subcortically, right-lateralized superior (lobule VI) and inferior cerebellar (lobule VIIIA/VIIB) areas. In contrast, a distributed network of bilateral inferior frontal and inferior temporal areas, and bilateral superior (lobule VI) and inferior (lobule VIIB) cerebellar areas, was recruited during visual working memory. Results of the study verified that a distinct cross cerebro-cerebellar circuitry underlies verbal working memory. However, a neural circuitry involving specialized brain areas in bilateral neocortical and bilateral cerebellar hemispheres subserving visual working memory is observed. Findings are discussed in the light of current models of working memory and data from related neuroimaging studies.
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Affiliation(s)
- H B Tommy Ng
- Division of Psychology, School of Humanities and Social Sciences, Nanyang Technological University, 637332, Singapore
| | - K-L Cathy Kao
- Division of Psychology, School of Humanities and Social Sciences, Nanyang Technological University, 637332, Singapore
| | - Y C Chan
- Division of Neurology, University Medicine Cluster, National University Health System, Singapore; Department of Medicine, Yong Loo Lin School of Medicine, National University of Singapore, Singapore
| | - Effie Chew
- Division of Neurology, University Medicine Cluster, National University Health System, Singapore; Department of Medicine, Yong Loo Lin School of Medicine, National University of Singapore, Singapore
| | - K H Chuang
- The Queensland Brain Institute, The University of Queensland, Brisbane, Queensland, Australia
| | - S H Annabel Chen
- Division of Psychology, School of Humanities and Social Sciences, Nanyang Technological University, 637332, Singapore; Centre for Research and Development in Learning (CRADLE), Nanyang Technological University, 637459, Singapore.
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