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Vrinceanu T, Esmail A, Predovan D, Pruessner J, Bherer L. DANCE-MOVEMENT THERAPY LEADS TO A LOWER CORTISOL AWAKENING RESPONSE—A SIGN OF STRESS REDUCTION? Innov Aging 2017. [DOI: 10.1093/geroni/igx004.959] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Affiliation(s)
- T. Vrinceanu
- Concordia University, Montreal, Quebec, Canada,
- Institut Universitaire de Gériatrie de Montréal, Montreal, Quebec, Canada,
- Montreal Heart Institute, Montreal, Quebec, Canada,
| | - A. Esmail
- Concordia University, Montreal, Quebec, Canada,
- Institut Universitaire de Gériatrie de Montréal, Montreal, Quebec, Canada,
- Montreal Heart Institute, Montreal, Quebec, Canada,
| | - D. Predovan
- Université du Québec à Montréal, Montreal, Quebec, Canada,
| | | | - L. Bherer
- Institut Universitaire de Gériatrie de Montréal, Montreal, Quebec, Canada,
- Montreal Heart Institute, Montreal, Quebec, Canada,
- Faculty of Medicine, Université de Montréal, Montreal, Quebec, Canada
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Rajah MN, Wallace LMK, Ankudowich E, Yu EH, Swierkot A, Patel R, Chakravarty MM, Naumova D, Pruessner J, Joober R, Gauthier S, Pasvanis S. Family history and APOE4 risk for Alzheimer's disease impact the neural correlates of episodic memory by early midlife. Neuroimage Clin 2017; 14:760-774. [PMID: 28413778 PMCID: PMC5385589 DOI: 10.1016/j.nicl.2017.03.016] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/21/2016] [Revised: 03/29/2017] [Accepted: 03/30/2017] [Indexed: 01/19/2023]
Abstract
Episodic memory impairment is a consistent, pronounced deficit in pre-clinical stages of late-onset Alzheimer's disease (AD). Individuals with risk factors for AD exhibit altered brain function several decades prior to the onset of AD-related symptoms. In the current event-related fMRI study of spatial context memory we tested the hypothesis that middle-aged adults (MA; 40–58 yrs) with a family history of late onset AD (MA+ FH), or a combined + FH and apolipoprotein E ε4 allele risk factors for AD (MA+ FH + APOE4), will exhibit differences in encoding and retrieval-related brain activity, compared to − FH − APOE4 MA controls. We also hypothesized that the two at-risk MA groups will exhibit distinct patterns of correlation between brain activity and memory performance, compared to controls. To test these hypotheses we conducted multivariate task, and behavior, partial least squares analysis of fMRI data obtained during successful context encoding and retrieval. Our results indicate that even though there were no significant group differences in context memory performance, there were significant differences in brain activity and brain-behavior correlations involving the hippocampus, inferior parietal cortex, cingulate, and precuneus cortex in MA with AD risk factors, compared to controls. In addition, we observed that brain activity and brain-behavior correlations in anterior-medial PFC and in ventral visual cortex differentiated the two MA risk groups from each other, and from MAcontrols. Our results indicate that functional differences in episodic memory-related regions are present by early midlife in adults with + FH and + APOE-4 risk factors for late onset AD, compared to middle-aged controls. FMRI study of context memory in middle-aged adults (MA) with vs. without specific AD risk factors MA with vs. without AD risk factors show different angular gyrus, cingulate and precuneus activity patterns. MA with AD risk factors showed increased hippocampus activity at encoding, compared to controls. Medial PFC and visual cortex function differentiated + FH vs. + APOE4 MA risk groups.
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Affiliation(s)
- M N Rajah
- Department of Psychiatry, McGill University, Canada.,Brain Imaging Centre, Douglas Mental Health University Institute, Canada
| | - L M K Wallace
- Brain Imaging Centre, Douglas Mental Health University Institute, Canada.,Integrated Program in Neuroscience, McGill University, Canada
| | - E Ankudowich
- Brain Imaging Centre, Douglas Mental Health University Institute, Canada.,Integrated Program in Neuroscience, McGill University, Canada
| | - E H Yu
- Brain Imaging Centre, Douglas Mental Health University Institute, Canada.,Integrated Program in Neuroscience, McGill University, Canada
| | - A Swierkot
- Brain Imaging Centre, Douglas Mental Health University Institute, Canada.,Integrated Program in Neuroscience, McGill University, Canada
| | - R Patel
- Brain Imaging Centre, Douglas Mental Health University Institute, Canada.,Department of Biological and Biomedical Engineering, McGill University, Canada
| | - M M Chakravarty
- Department of Psychiatry, McGill University, Canada.,Brain Imaging Centre, Douglas Mental Health University Institute, Canada.,Department of Biological and Biomedical Engineering, McGill University, Canada
| | - D Naumova
- Department of Psychiatry, McGill University, Canada.,Integrated Program in Neuroscience, McGill University, Canada
| | - J Pruessner
- Department of Psychiatry, McGill University, Canada.,Brain Imaging Centre, Douglas Mental Health University Institute, Canada
| | - R Joober
- Department of Psychiatry, McGill University, Canada
| | - S Gauthier
- Department of Neurology and Neurosurgery, McGill University, Canada
| | - S Pasvanis
- Brain Imaging Centre, Douglas Mental Health University Institute, Canada
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Wiest R, Burren Y, Hauf M, Schroth G, Pruessner J, Zbinden M, Cattapan-Ludewig K, Kiefer C. Classification of mild cognitive impairment and Alzheimer disease using model-based MR and magnetization transfer imaging. AJNR Am J Neuroradiol 2012; 34:740-6. [PMID: 23064592 DOI: 10.3174/ajnr.a3307] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
BACKGROUND AND PURPOSE Early stratification of degenerative processes is a prerequisite to warrant therapeutic options in prodromal Alzheimer disease. Our aim was to investigate differences in cerebral macromolecular tissue composition between patients with AD, mild cognitive impairment, and age- and sex-matched healthy controls by using model-based magnetization transfer with a binary spin-bath magnetization transfer model and magnetization transfer ratio at 1.5 T. MATERIALS AND METHODS We investigated patients with de novo AD (n=18), MCI (n=18), and CTRLs (n=18). A region-of-interest analysis of the entorhinal cortex, hippocampal head and body, insula, and temporal neocortex was performed with fuzzy clustering to associate every subregion to a cluster representative for each group. RESULTS Cluster analysis achieved a concordance of 0.92 (50 of 54 subjects) between a combination of the calculated mMT parameters (kf,kr,T2r,F,T2f) in the entorhinal cortex and the neuropsychological diagnosis. The sensitivity and specificity for the discrimination of AD from MCI reached 1 and 0.94, with a positive predictive value of 0.95 and a negative predictive value of 1. Compared with mMT, the concordance for MTR was 0.83 (45 of 54 subjects) with a lower specificity of 0.5 and positive predictive value of 0.67 to discriminate patients with AD and MCI. CONCLUSIONS mMT imaging detects macromolecule-related alterations and allows an improved classification of patients with early AD and MCI compared with MTR.
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Affiliation(s)
- R Wiest
- Support Center for Advanced Neuroimaging, University Institute of Diagnostic and Interventional Neuroradiology, Inselspital, University of Bern, Bern, Switzerland
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Boccardi M, Bocchetta M, Apostolova L, Barnes J, Bartzokis G, Corbetta G, DeCarli C, DeToledo-Morrell L, Firbank M, Ganzola R, Gerritsen L, Henneman W, Killiany R, Malykhin N, Pasqualetti P, Pruessner J, Redolfi A, Robitaille N, Soininen H, Tolomeo D, Wang L, Watson C, Wolf H, Duchesne S, Jack C, Frisoni G. Delphi Consensus on Landmarks for the Manual Segmentation of the Hippocampus on MRI: Preliminary Results from the EADC-ADNI Harmonized Protocol Working Group (S04.003). Neurology 2012. [DOI: 10.1212/wnl.78.1_meetingabstracts.s04.003] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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Buchy L, Czechowska Y, Chochol C, Malla A, Joober R, Pruessner J, Lepage M. Toward a model of cognitive insight in first-episode psychosis: verbal memory and hippocampal structure. Schizophr Bull 2010; 36:1040-9. [PMID: 19346315 PMCID: PMC2930348 DOI: 10.1093/schbul/sbp015] [Citation(s) in RCA: 60] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
Our previous work has linked verbal learning and memory with cognitive insight, but not clinical insight, in individuals with a first-episode psychosis (FEP). The current study reassessed the neurocognitive basis of cognitive and clinical insight and explored their neural basis in 61 FEP patients. Cognitive insight was measured with the Beck Cognitive Insight Scale (BCIS) and clinical insight with the Scale to assess Unawareness of Mental Disorder (SUMD). Global measures for 7 domains of cognition were examined. Hippocampi were manually segmented in to 3 parts: the body, head, and tail. Verbal learning and memory significantly correlated with the BCIS composite index. Composite index scores were significantly associated with total left hippocampal (HC) volume; partial correlations, however, revealed that this relationship was attributable largely to verbal memory performance. The BCIS self-certainty subscale significantly and inversely correlated with bilateral HC volumes, and these associations were independent of verbal learning and memory performance. The BCIS self-reflectiveness subscale significantly correlated with verbal learning and memory but not with HC volume. No significant correlations emerged between the SUMD and verbal memory or HC volume. These results strengthen our previous assertion that in individuals with an FEP cognitive insight may rely on memory whereby current experiences are appraised based on previous ones. The HC may be a viable location among others for the brain system that underlies aspects of cognitive insight in individuals with an FEP.
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Affiliation(s)
- L. Buchy
- Brain Imaging Group, Douglas Mental Health University Institute, Quebec, Canada,Department of Neurology and Neurosurgery, Montreal Neurological Institute, McGill University, Quebec, Canada
| | - Y. Czechowska
- Brain Imaging Group, Douglas Mental Health University Institute, Quebec, Canada
| | - C. Chochol
- Brain Imaging Group, Douglas Mental Health University Institute, Quebec, Canada,Department of Neurology and Neurosurgery, Montreal Neurological Institute, McGill University, Quebec, Canada
| | - A. Malla
- Prevention and Early Intervention Program for Psychoses, Douglas Mental Health University Institute, Quebec, Canada,Department of Psychiatry, McGill University, Quebec, Canada
| | - R. Joober
- Prevention and Early Intervention Program for Psychoses, Douglas Mental Health University Institute, Quebec, Canada,Department of Psychiatry, McGill University, Quebec, Canada
| | - J. Pruessner
- Brain Imaging Group, Douglas Mental Health University Institute, Quebec, Canada,Department of Neurology and Neurosurgery, Montreal Neurological Institute, McGill University, Quebec, Canada
| | - M. Lepage
- Brain Imaging Group, Douglas Mental Health University Institute, Quebec, Canada,Department of Neurology and Neurosurgery, Montreal Neurological Institute, McGill University, Quebec, Canada,Prevention and Early Intervention Program for Psychoses, Douglas Mental Health University Institute, Quebec, Canada,Department of Psychiatry, McGill University, Quebec, Canada,To whom correspondence should be addressed; Brain Imaging Group, Douglas Mental Health University Institute, 6875 LaSalle Boulevard, Verdun, Quebec H4H 1R3, Canada; tel: 514-761-6131 ext. 4393, fax: 514-888-4064, e-mail:
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Allman A, Benkelfat C, Callahan B, Dagher A, Casey K, Pruessner J, Joober R, Malla A, O'Driscoll G. Stress-induced Dopamine Release in Relatives of Schizophrenic Patients. Neuroimage 2009. [DOI: 10.1016/s1053-8119(09)71926-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022] Open
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Rajah M, Bastianetto S, Bromley-Brits K, Cools R, D’Esposito M, Grady C, Poirier J, Quirion R, Raz N, Rogaeva E, Song W, Pruessner J. Biological changes associated with healthy versus pathological aging: a symposium review. Ageing Res Rev 2009; 8:140-6. [PMID: 19274854 DOI: 10.1016/j.arr.2009.01.003] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
The Douglas Mental Health University Institute, in collaboration with the McGill Centre for Studies in Aging, organized a 2-day symposium entitled "Biological Changes Associated with Healthy Versus Pathological Aging" that was held in 13 and 14 December 2007 on the Douglas campus. The symposium involved presentations on current trends in aging and dementia research across several sub-disciplines: genetics, neurochemistry, structural and functional neuroimaging and clinical treatment and rehabilitation. The goal of this symposium was to provide a forum for knowledge-transfer between scientists and clinicians with different specializations in order to promote cross-fertilization of research ideas that would lead to future collaborative neuroscience research in aging and dementia. In this review article, we summarize the presentations made by the 13 international scientists at the symposium and highlight: (i) past research, and future research trends in neuroscience of aging and dementia and (ii) links across levels of analysis that can lead to fruitful transdisciplinary research programs that will advance knowledge about the neurobiological changes associated with healthy aging and dementia.
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Fortin M, Voss P, Lord C, Lassonde M, Pruessner J, Saint-Amour D, Rainville C, Lepore F. Wayfinding in the blind: larger hippocampal volume and supranormal spatial navigation. Brain 2008; 131:2995-3005. [DOI: 10.1093/brain/awn250] [Citation(s) in RCA: 103] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
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Harvey PO, Pruessner J, Czechowska Y, Lepage M. Individual differences in trait anhedonia: a structural and functional magnetic resonance imaging study in non-clinical subjects. Mol Psychiatry 2007; 12:703, 767-75. [PMID: 17505465 DOI: 10.1038/sj.mp.4002021] [Citation(s) in RCA: 198] [Impact Index Per Article: 11.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
Anhedonia, the reduced capacity to gain pleasure from pleasurable experiences, is a key symptom of major depression and schizophrenia. Reduced hedonic capacity can also be measured as an enduring trait in non-clinical subjects. Such altered hedonic capacity is likely the result of a basic neuropsychophysiological dysfunction and a vulnerability marker that potentially precedes and contributes to the liability of developing psychiatric disorders. The characterization of the structural and functional neural correlates of trait anhedonia in non-clinical individuals may provide new insights for the early detection of such psychiatric diseases. Twenty-nine non-clinical subjects were scanned at the Montreal Neurological Institute. Trait anhedonia was measured using the Chapman Revised Physical Anhedonia Scale. Semi-automated and automated structural MRI segmentation techniques were used to explore structural correlates of trait anhedonia. Seventeen of the 29 subjects also underwent a functional imaging task where responses to the viewing of affective stimuli were examined to identify the functional correlates of trait anhedonia. Trait anhedonia was inversely related to anterior caudate volume, but positively related to ventromedial prefrontal cortex activity during the processing of positive information. These findings may reflect a specific kind of vulnerability for the development of psychiatric affective disorders and suggest that trait anhedonia may be linked to a volumetric reduction in the basal ganglia and to a prefrontal functional abnormality during hedonic processing.
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Affiliation(s)
- P-O Harvey
- Douglas Hospital Research Centre, Verdun, QC, Canada
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Leinsinger G, Teipel S, Wismüller A, Born C, Meindl T, Flatz W, Schönberg S, Pruessner J, Hampel H, Reiser M. [Volumetric MRI for evaluation of regional pattern and progressin of neocortical degeneration in Alzheimer's disease]. Radiologe 2003; 43:537-42. [PMID: 12955216 DOI: 10.1007/s00117-003-0928-1] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Abstract
PURPOSE Volumetric analysis of the corpus callosum and hippocampus using MRI in Alzheimer's disease (AD) to evaluate the regional pattern and progression of neocortical neurodegeneration. METHODS In subsequent studies we investigated patients with AD and healthy controls. Volumetry was based on MRI-data from a sagittal 3D T1w-gradient echo sequence. The corpus callosum (CC) was measured in a midsagittal slice, and subdivided into 5 subregions. Volumetry of the hippocampus/amygdala-formation (HAF) was performed by segmentation in coronary reoriented slices. RESULTS In AD patients we found a significant atrophy in the rostrum und splenium of CC. The atrophy was correlated with the severity of dementia, but no correlation was found with the load of white matter lesions. In comparison with (18)FDG-PET, we found a significant correlation of regional CC-atrophy with the regional decline of cortical glucose metabolism. A ROC-analysis demonstrated no significant differences in the diagnostic accuracy of HAF volumetry and regional CC volumetry of the splenium (region C5) even in mild stages of dementia. CONCLUSION Regional atrophy of CC can be used as a marker of neocortical degeneration even in early stages of dementia in AD.
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Affiliation(s)
- G Leinsinger
- Institut für Klinische Radiologie, Klinikum der Ludwig-Maximilians-Universität München, Munich.
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Duchesne S, Pruessner J, Collins DL. Appearance-based segmentation of medial temporal lobe structures. Neuroimage 2002; 17:515-31. [PMID: 12377131] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/26/2023] Open
Abstract
A new paradigm for the characterization of structure appearance is proposed, based on a combination of gray-level MRI intensity data and a shape descriptor derived from a priori principal components analysis of 3D deformation vector fields. Generated without external intervention, it extends into 3D more classic, 2D manual landmark-based shape models. Application of this novel concept led to a method for the segmentation of medial temporal lobe structures from brain magnetic resonance images. The strategy employed for segmentation aims at synthesizing, using the appearance model, a deformation field that maps a new volume onto a reference target. Any information defined on the reference can then be propagated back on the new volume instance, thereby achieving segmentation. The proposed method was tested on a data set of 80 normal subjects and compared against manual segmentation as well as automated segmentation results from ANIMAL, a nonlinear registration and segmentation technique. Experimental results demonstrated the robustness and flexibility of the new method. Segmentation accuracy, measured by overlap statistics, is marginally lower (< 2%) than ANIMAL, while processing time is six times faster. Finally, the applicability of this concept toward shape deformation analysis is presented.
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Affiliation(s)
- S Duchesne
- McConnell Brain Imaging Centre, Montreal Neurological Institute, McGill University, 3801 University Street, Montreal, Canada.
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Affiliation(s)
- B C Schutte
- Department of Pediatrics, University of Iowa, Iowa City 52242, USA.
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Kaufman HH, Satterwhite T, McConnell BJ, Costin B, Borit A, Gould L, Pruessner J, Bernstein D, Gildenberg PL. Deep vein thrombosis and pulmonary embolism in head injured patients. Angiology 1983; 34:627-38. [PMID: 6226216 DOI: 10.1177/000331978303401001] [Citation(s) in RCA: 42] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
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