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Emily C Edmonds, Joel Eppig, Mark W Bondi, Kelly M Leyden, Bailey Goodwin, Lisa Delano-Wood, Carrie R McDonald
OBJECTIVE: We investigated differences in regional cortical thickness between previously identified empirically derived mild cognitive impairment (MCI) subtypes (amnestic MCI, dysnomic MCI, dysexecutive/mixed MCI, and cluster-derived normal) in order to determine whether these cognitive subtypes would show different patterns of cortical atrophy. METHODS: Participants were 485 individuals diagnosed with MCI and 178 cognitively normal individuals from the Alzheimer's Disease Neuroimaging Initiative...
October 19, 2016: Neurology
Changtae Hahn, Chang-Uk Lee, Wang Yeon Won, Soo-Hyun Joo, Hyun Kook Lim
OBJECTIVE: This study aimed to investigate thalamic shape alterations and their relationships with various episodic memory impairments in subjects with amnestic mild cognitive impairment (aMCI). METHODS: We compared volumes and morphological alterations of the thalamus between aMCI subjects and healthy controls. In addition, we investigated the correlation between thalamic deformations and various memory impairments in aMCI subjects using a comprehensive neuropsychological battery...
September 2016: Psychiatry Investigation
Rinko Grewal, Mona Haghighi, Shuai Huang, Amanda G Smith, Chuanhai Cao, Xiaoyang Lin, Daniel C Lee, Nancy Teten, Angela M Hill, Maj-Linda B Selenica
BACKGROUND: There is a need to investigate biomarkers that are indicative of the progression of dementia in ethnic patient populations. The disparity of information in these populations has been the focus of many clinical and academic centers, including ours, to contribute to a higher success rate in clinical trials. In this study, we have investigated plasma biomarkers in amnestic mild cognitively impaired (aMCI) female patient cohorts in the context of ethnicity and cognitive status...
October 18, 2016: Alzheimer's Research & Therapy
Harry von Piekartz, Ani Pudelko, Mira Danzeisen, Toby Hall, Nikolaus Ballenberger
BACKGROUND: There is preliminary evidence of cervical musculoskeletal impairment in some temporomandibular disorder (TMD) pain states. OBJECTIVES: To determine whether people with TMD, classified as either mild or moderate/severe TMD, have more cervical signs of dysfunction than healthy subjects. DESIGN: Cross-sectional survey. METHOD: Based on the Conti Amnestic Questionnaire and examination of the temporomandibular joint (Axis I classification of the Research Diagnostic Criteria for TMD), of 144 people examined 59 were classified to a mild TMD group, 40 to a moderate/severe TMD group and 45 to an asymptomatic control group without TMD...
September 23, 2016: Manual Therapy
Benjamin Lam, Aun Khan, Julia Keith, Ekaterina Rogaeva, Juan Bilbao, Peter St George-Hyslop, Mahdi Ghani, Morris Freedman, Donald T Stuss, Tiffany Chow, Sandra E Black, Mario Masellis
INTRODUCTION: Corticobasal syndrome (CBS) resulting from genetic Alzheimer's disease (AD) has been described only once. Whether familial CBS-AD is a distinct clinical entity with its own imaging signature remains unknown. METHODS: Four individuals with CBS from two families underwent detailed assessment. For two individuals, regional atrophy and hypoperfusion were compared to autopsy-confirmed typical late-onset AD and corticobasal degeneration, as well as genetically proven PSEN1 cases with an amnestic presentation...
October 12, 2016: Alzheimer's & Dementia: the Journal of the Alzheimer's Association
Qing Ye, Fan Su, Hao Shu, Liang Gong, Chunming Xie, Zhijun Zhang, Feng Bai
Previous cross-sectional studies that investigated the effects of apolipoprotein E (ApoE) ε4 status on hippocampal networks have shown inconsistent results. Aging is a well-known risk factor for Alzheimer's disease (AD) and could strongly interact with ApoE-related vulnerabilities to affect AD risk. However, no longitudinal data have been published regarding the interaction of the ApoE genotype and aging on hippocampal networks. Fifty-one patients with amnestic-type mild cognitive impairment (aMCI) and 64 matched cognitively normal elderly subjects underwent resting-state fMRI scans and neuropsychological tests at baseline and at a 35-month follow-up...
October 12, 2016: Brain Imaging and Behavior
Laura Borrello, Chiara Cupidi, Valentina Laganà, Maria Anfossi, Maria Elena Conidi, Nicoletta Smirne, Maria Taverniti, Roberto Guarasci, Amalia Cecilia Bruni
The rebuilding of the N family, a large Italian kindred affected by early-onset autosomal dominant Alzheimer's disease (AD), provided an important contribution to the discovery of Presenilin 1 (PSEN1), the main gene responsible for familial AD. This pedigree was identified with the help of medical records from the archives of the Psychiatric Hospital of Girifalco, Italy. The clinical record of Angela R., an ancestor of the N family, dating back to 1904, showed a clinical picture of Angela R., consistent with a diagnosis of non-amnestic probable AD, matching the "dysexecutive" phenotype described in her descendants...
October 11, 2016: Journal of Neurology
N A Trusova, O S Levin, A V Arablinsky
AIM: To study clinical/neuropsychological and neuroimaging characteristics of Alzheimer's disease in the combination with cerebrovascular disease (CVD). MATERIAL AND METHODS: Ninety patients with dementia, including 35 patients with AD, 35 patients with mixed dementia (MD) and 20 patients with vascular dementia, were examined. The character of dementia was established according to NINCDS-ADRDA and NINDS-AIREN criteria. The neuropsychological battery included Addenbrooke's Cognitive Examination (ACE-R), Montreal Cognitive Assessment scale (MoCA), fluency test and the visual memory test (SCT)...
2016: Zhurnal Nevrologii i Psikhiatrii Imeni S.S. Korsakova
Brianna Knoll, Joseph Simonett, Nicholas J Volpe, Sina Farsiu, Mallory Ward, Alfred Rademaker, Sandra Weintraub, Amani A Fawzi
INTRODUCTION: Retinal structural changes in subjects with mild cognitive impairment (MCI) remain a subject of controversy. METHODS: We investigated the correlation between optical coherence tomography (OCT) of the retinal sublayers, including the retinal nerve fiber layer (RNFL), and cognitive function in subjects with amnestic MCI and compared the OCT findings with matched controls. We also performed a meta-analysis of the world literature using a random-effects model...
2016: Alzheimer's & Dementia: Diagnosis, Assessment & Disease Monitoring
Feng Lin, Ping Ren, Raymond Y Lo, Benjamin P Chapman, Alanna Jacobs, Timothy M Baran, Anton P Porsteinsson, John J Foxe
Apolipoprotein E (APOE) ɛ4 carriers and patients with amnestic mild cognitive impairment (MCI) have high risk of developing Alzheimer's disease (AD). The Scaffolding Theory of Aging and Cognition proposes that recruitment of additional frontal brain regions can protect cognition against aging. This thesis has yet to be fully tested in older adults at high risk for AD. In the present study, 75 older participants (mean age: 74 years) were included. Applying a voxel-wise approach, fractional amplitude of low-frequency fluctuations (fALFF) in resting-state functional neuroimaging data were analyzed as a function of APOEɛ4 status (carrier versus noncarrier) and clinical status (healthy control [HC] versus MCI) using a 2×2 analysis of covariance (ANCOVA)...
October 4, 2016: Journal of Alzheimer's Disease: JAD
Erin E Sundermann, Pauline M Maki, Leah H Rubin, Richard B Lipton, Susan Landau, Anat Biegon
OBJECTIVE: We investigated sex differences in verbal memory across different levels of neural dysfunction, measured by temporal lobe glucose metabolic rates (TLGluMR). METHODS: Three hundred ninety controls and 672 participants with amnestic mild cognitive impairment (aMCI) and 254 with Alzheimer disease (AD) dementia from the Alzheimer's Disease Neuroimaging Initiative completed the Rey Auditory Verbal Learning Test (RAVLT) and [(18)F]-fluorodeoxyglucose-PET. Cross-sectional analyses were conducted using linear regression to examine the sex by TLGluMR interaction on RAVLT performance in the overall sample and within diagnostic groups adjusting for age, education, and APOE ε4 genotype...
October 5, 2016: Neurology
Carlo Abbate, Pietro Davide Trimarchi, Emanuela Rotondo, Silvia Inglese, Paola Nicolini, Paolo Dionigi Rossi, Beatrice Arosio, Daniela Mari
Confabulation may be present in Alzheimer's disease (AD), but usually it is not a primary feature of either its typical or atypical variants. In this report, we describe the case of an AD patient who showed an unusual and enduring neuropsychiatric phenotype characterized by early and prominent spontaneous confabulation. Surprisingly, such atypical AD presentation bears a striking resemblance to presbyophrenia, a subtype of dementia which was described at the beginning of the twentieth century and then sank into oblivion...
October 5, 2016: Neurocase
Long Xie, John B Pluta, Sandhitsu R Das, Laura E M Wisse, Hongzhi Wang, Lauren Mancuso, Dasha Kliot, Brian B Avants, Song-Lin Ding, José V Manjón, David A Wolk, Paul A Yushkevich
RATIONALE: The human perirhinal cortex (PRC) plays critical roles in episodic and semantic memory and visual perception. The PRC consists of Brodmann areas 35 and 36 (BA35, BA36). In Alzheimer's disease (AD), BA35 is the first cortical site affected by neurofibrillary tangle pathology, which is closely linked to neural injury in AD. Large anatomical variability, manifested in the form of different cortical folding and branching patterns, makes it difficult to segment the PRC in MRI scans...
October 1, 2016: NeuroImage
Jessica Peter, Jannis Kaiser, Verena Landerer, Lena Köstering, Christoph P Kaller, Bernhard Heimbach, Michael Hüll, Tobias Bormann, Stefan Klöppel
The exploration and retrieval of words during category fluency involves different strategies to improve or maintain performance. Deficits in that task, which are common in patients with amnestic mild cognitive impairment (aMCI), mirror either impaired semantic memory or dysfunctional executive control mechanisms. Relating category fluency to tasks that place greater demands on either semantic knowledge or executive functions might help to determine the underlying cognitive process. The aims of this study were to compare performance and strategy use of 20 patients with aMCI to 30 healthy elderly controls (HC) and to identify the dominant component (either executive or semantic) for better task performance in category fluency...
September 30, 2016: Neuropsychologia
Thanh G N Ton, Thomas DeLeire, Suepattra G May, Ningqi Hou, Mahlet G Tebeka, Er Chen, Joshua Chodosh
INTRODUCTION: Individuals with amnestic mild cognitive impairment (aMCI) are at elevated risk of developing Alzheimer's disease (AD) dementia. METHODS: With data from the Aging, Demographics, and Memory Study, we used the Clinical Dementia Rating Sum of Boxes classifications to conduct a cross-sectional analysis assessing the relationship between cognitive state and various direct and indirect costs and health care utilization patterns. RESULTS: Patients with aMCI had less medical expenditures than patients with moderate and severe AD dementia (P < ...
September 28, 2016: Alzheimer's & Dementia: the Journal of the Alzheimer's Association
Sydney Y Schaefer, Kevin Duff
Practice effects on neuropsychological tests, which are improvements in test scores due to repeated exposure to testing materials, are robust in healthy elders, but muted in older adults with cognitive disorders. Conversely, few studies have investigated practice effects on motor tasks involving procedural memory, particularly across test-retest periods exceeding 24 hours. The current study examined one-week practice effects on a novel upper extremity motor task in 54 older adults with amnestic mild cognitive impairment...
October 3, 2016: Journal of Clinical and Experimental Neuropsychology
Jordi A Matias-Guiu, Ana Cortés-Martínez, Maria Valles-Salgado, Teresa Rognoni, Marta Fernández-Matarrubia, Teresa Moreno-Ramos, Jorge Matías-Guiu
BACKGROUND: Addenbrooke's Cognitive Examination III (ACE-III) is a screening test that was recently validated for diagnosing dementia. Since it assesses attention, language, memory, fluency, and visuospatial function separately, it may also be useful for general neuropsychological assessments. The aim of this study was to analyze the tool's ability to detect early stages of Alzheimer's disease and to examine the correlation between ACE-III scores and scores on standardized neuropsychological tests...
September 29, 2016: International Psychogeriatrics
Herman Buschke, Wenzhu B Mowrey, Wendy S Ramratan, Molly E Zimmerman, David A Loewenstein, Mindy J Katz, Richard B Lipton
OBJECTIVE: We aimed to assess reliability and cross-sectional discriminative validity of the Memory Binding Test (MBT) to distinguish persons with amnestic cognitive impairment (aMCI) and dementia from cognitively normal elderly controls. METHOD: The MBT was administered to 20 participants with dementia, 31 with aMCI and 246 controls, who received the first administration of the MBT from May 2003 to December 2007, as a substudy of the community-based Einstein Aging Study (age range: 70+)...
September 27, 2016: Archives of Clinical Neuropsychology: the Official Journal of the National Academy of Neuropsychologists
Sonia Marcone, Jean-François Gagnon, Sarah Lecomte, Hélène Imbeault, Frédérique Limoges, Ronald B Postuma, Josie-Anne Bertrand, Sven Joubert, Isabelle Rouleau
OBJECTIVE: Prospective memory (PM) is a cognitive function defined as the ability to perform an intention at an appropriate moment in the future. In the aging population, PM is essential for maintaining independent daily living. Introduced as a simple and quick way to assess PM in clinical settings, the envelope task has to date received very limited empirical and practical interest. METHODS: The present study investigated the task's clinical utility in detecting PM impairment in a sample composed of 49 healthy older adults (OA), 41 patients with Alzheimer's disease, and 64 individuals with amnestic and nonamnestic mild cognitive impairment (MCI) of heterogeneous etiology: 17 of idiopathic nature, 20 presenting an idiopathic rapid-eye movement sleep behaviour disorder, and 27 patients diagnosed with idiopathic Parkinson's disease...
September 26, 2016: Canadian Journal of Neurological Sciences. le Journal Canadien des Sciences Neurologiques
Laura Serra, Matteo Mancini, Mara Cercignani, Carlotta Di Domenico, Barbara Spanò, Giovanni Giulietti, Giacomo Koch, Camillo Marra, Marco Bozzali
Cognitive reserve (CR) is known to modulate the clinical features of Alzheimer's disease (AD). This concept may be critical for the development of non-pharmacological interventions able to slow down patients' cognitive decline in the absence of disease-modifying treatments. We aimed at identifying the neurobiological substrates of CR (i.e., neural reserve) over the transition between normal aging and AD, by assessing the underlying brain networks and their topological properties. A cohort of 154 participants (n = 68 with AD, n = 61 with amnestic mild cognitive impairment (aMCI), and 25 healthy subjects) underwent resting-state functional MRI and neuropsychological testing...
September 21, 2016: Journal of Alzheimer's Disease: JAD
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