35 documents found, page 1 of 4
Long-term predictive accuracy of the ‘mild cognitive impairment due to Alzheime...
Cardoso, Sandra; Montalvo, Alexandre; Maroco, João; Silva, Dina; Alves, Luísa; Guerreiro, Manuela; Mendonça, Alexandre deBackground: The development and clinical use of biomarkers has dramatically changed the framework of Alzheimer’s disease (AD) management, allowing the diagnosis at the mild cognitive impairment (MCI) stage. In 2015 we compared the prevalence and prognosis of AD at the MCI stage according to different criteria available at that time, and we found that the National Institute of Aging-Alzheimer Association (NIA-AA...
Frequency, sociodemographic, and neuropsychological features of patients with s...
Pestana, Pedro Câmara; Cardoso, Sandra; Guerreiro, Manuela; Maroco, João; Jessen, Frank; Couto, Frederico Simões do; Mendonça, Alexandre deBackground: Subjective Cognitive Decline (SCD) is recognized as a risk stage for future cognitive impairment and dementia. The criteria for SCD include normal performance on neuropsychological testing; however, there is a lack of consensus regarding standard score cut-offs for neuropsychological tests to define cognitive impairment and to differentiate between SCD and Mild Cognitive Impairment (MCI). This study...
Extending the phenotypic spectrum assessed by the CDR plus NACC FTLD in genetic...
Genetic FTD Initiative (GENFI); Samra, Kiran; Peakman, Georgia; MacDougall, Amy M.; Bouzigues, Arabella; Greaves, Caroline V.; Convery, Rhian S.INTRODUCTION: We aimed to expand the range of the frontotemporal dementia (FTD) phenotypes assessed by the Clinical Dementia Rating Dementia Staging Instrument plus National Alzheimer's Coordinating Center Behavior and Language Domains (CDR plus NACC FTLD). METHODS: Neuropsychiatric and motor domains were added to the standard CDR plus NACC FTLD generating a new CDR plus NACC FTLD-NM scale. This was assessed in...
Longitudinal cerebral perfusion in presymptomatic genetic frontotemporal dement...
The Genetic Frontotemporal Dementia Initiative (GENFI); Pasternak, Maurice; Mirza, Saira S.; Luciw, Nicholas; Mutsaerts, Henri J. M. M.; Petr, JanINTRODUCTION: Effective longitudinal biomarkers that track disease progression are needed to characterize the presymptomatic phase of genetic frontotemporal dementia (FTD). We investigate the utility of cerebral perfusion as one such biomarker in presymptomatic FTD mutation carriers. METHODS: We investigated longitudinal profiles of cerebral perfusion using arterial spin labeling magnetic resonance imaging in 4...
Amyloid-negative, neurodegeneration-negative amnestic mild cognitive impairment
Cardoso, Sandra; Guerreiro, Manuela; Montalvo, Alexandre; Silva, Dina; Alves, Luísa; Mendonça, Alexandre deBackground:The concept of amnestic mild cognitive impairment (aMCI) was developed to identify patients at an initial stage of Alzheimer's disease (AD). However, some patients with aMCI do not present biomarkers of amyloid pathology or neuronal injury.Objective:To know the natural history of amyloid-negative and neurodegeneration-negative patients with aMCI, namely to ascertain: 1) whether these patients remain ...
Different MMSE domains are associated to cognitive decline and education
Cardoso, Sandra; Barros, Ricardo; Maroco, J. P.; Mendonça, Alexandre de; Guerreiro, ManuelaThe Mini-Mental State Examination (MMSE) is a long-established test to screen for dementia, estimate the severity and monitor the progression of cognitive impairment. The MMSE total score is dependent upon demographic factors, particularly education, but little is known about how education influences the 6 distinct MMSE cognitive domains. The present study aims to understand how the performances in the MMSE cog...
The update of semantic memories in amnestic Mild Cognitive Impairment
Mendonça, Alexandre de; Cardoso, Sandra; Maroco, João; Guerreiro, Manuela; Carmo, Joana CostaIt is still controversial to what extent neocortical consolidated memories are susceptible of change by processes of reconsolidation and transformation throughout experience, and whether the medial temporal lobes are necessary for this update of semantic consolidated memories, as they are for episodic remembering. We hypothesise that patients with amnestic mild cognitive impairment (aMCI) who have deficits in e...
Neuropsychological contribution to predict conversion to dementia in patients w...
Silva, Dina Lúcia Gomes da; Cardoso, Sandra; Guerreiro, Manuela; Marôco, J. P.; Mendes, Tiago; Alves, Luísa; Nogueira, Joana Maia; Baldeiras, InesDiagnosis of Alzheimer's disease (AD) confirmed by biomarkers allows the patient to make important life decisions. However, doubt about the fleetness of symptoms progression and future cognitive decline remains. Neuropsychological measures were extensively studied in prediction of time to conversion to dementia for mild cognitive impairment (MCI) patients in the absence of biomarker information. Similar neurops...
Apathy in presymptomatic genetic frontotemporal dementia predicts cognitive dec...
Malpetti, Maura; Jones, P. Simon; Tsvetanov, Kamen A.; Rittman, Timothy; Swieten, John C.; Borroni, Barbara; Sanchez‐Valle, Raquel; Moreno, FerminIntroduction: Apathy adversely affects prognosis and survival of patients with frontotemporal dementia (FTD). We test whether apathy develops in presymptomatic genetic FTD, and is associated with cognitive decline and brain atrophy. Methods: Presymptomatic carriers of MAPT, GRN or C9orf72 mutations (N = 304), and relatives without mutations (N = 296) underwent clinical assessments and MRI at baseline, and annua...
Mental time travel in mild cognitive impairment
Coelho, Sara; Guerreiro, Manuela; Chester, Catarina; Silva, Dina Lúcia Gomes da; Marôco, J. P.; Paglieri, Fabio; Mendonça, Alexandre deIntroduction: Mental Time Travel (MTT) is the people's ability to remember themselves in the past and to imagine themselves in the future, and influence important life domains such as making decisions and planning future actions. It is widely recognized that patients with aMCI have deficits in episodic memory, but they also show impairments in semantic memory. It has been controversial whether MTT tasks are dis...