Loading...
5 results
Search Results
Now showing 1 - 5 of 5
- Memory awareness in patients with major depressive disorderPublication . Mendes, Tiago; Cardoso, Sandra; Guerreiro, Manuela; Marôco, João Paulo.; Silva, Dina; Alves, Luísa; Schmand, Ben; Couto, Frederico Simões Do; Figueira, Maria Luísa; De Mendonça, AlexandreSubjective Memory Complaints (SMC) along with cognitive deficits are frequently observed in patients with Major Depressive Disorder (MDD). The relationship between SMC and objective memory performance in patients with MDD was evaluated, in comparison with patients with Mild Cognitive Impairment due to Alzheimer's Disease (MCI-AD) and healthy controls (HC).
- Neuropsychological contribution to predict conversion to dementia in patients withmild cognitive impairment due Alzheimer’s diseasePublication . Silva, Dina Lúcia Gomes da; Cardoso, Sandra; Guerreiro, Manuela; Marôco, J. P.; Mendes, Tiago; Alves, Luísa; Nogueira, Joana Maia; Baldeiras, Ines; Santana, Isabel; Mendonça, Alexandre deDiagnosis 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 neuropsychological measures might also be useful to predict the progression to dementia in patients with MCI due to AD.
- The update of semantic memories in amnestic mild cognitive impairmentPublication . Mendonça, Alexandre De; Cardoso, Sandra; Marôco, J. P.; Guerreiro, Manuela; Carmo, Joana CIt 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 hypothesize that patients with amnestic mild cognitive impairment (aMCI) who have deficits in episodic memory may also have difficulties in updating information on added new features of objects. Sixteen participants with aMCI and 20 healthy control participants performed a semantic word-to-picture task, in which they were asked to identify as belonging to a given semantic category NEW objects, that have incorporated novel features, as well as OLD items, semantically and visually SIMILAR items and UNRELATED items. Patients with aMCI made a greater percentage of errors than healthy controls. Participants globally made greater percentages of errors in difficult types of items, namely NEW and SIMILAR, as compared to easier ones, OLD and UNRELATED. Importantly, an item by diagnostic group interaction effect was observed, and post hoc analysis showed that patients with aMCI made a higher percentage of errors than controls in NEW items only. In conclusion, patients with aMCI had a particular difficulty in identifying the NEW items of the word-to-picture task as compared to the control participants, supporting the concept of a flexible and dynamic conceptual knowledge system, involving the update of semantic memories and the integration of new attributes in a constant transformation process, which is impaired in these patients.
- Neuropsychological Predictors of long-term (10 Years) Mild Cognitive Impairment StabilityPublication . Alves, Luísa; Cardoso, Sandra; Marôco, J. P.; De Mendonça, Alexandre; Guerreiro, Manuela; Silva, Dina Lúcia Gomes daAlthough the diagnosis of mild cognitive impairment (MCI) corresponds to a condition likely to progress to dementia, essentially Alzheimer's disease, longitudinal studies have shown that some patients may not convert to dementia and maintain the diagnosis of MCI even after many years.
- Neuropsychological profile of amyloid-positive versus amyloid-negative amnestic Mild Cognitive ImpairmentPublication . Alves, Luísa; Cardoso, Sandra; Silva, Dina; Mendes, Tiago; Maroco, J. P.; Nogueira, Joana; Lima, Marisa; Pereira, Miguel Tábuas; Baldeiras, Inês; Santana, Isabel; De Mendonça, Alexandre; Guerreiro, ManuelaPatients diagnosed with amnestic mild cognitive impairment (aMCI) are at high risk of progressing to dementia. It became possible, through the use of biomarkers, to diagnose those patients with aMCI who have Alzheimer's disease. However, it is presently unfeasible that all patients undergo biomarker testing. Since neuropsychological testing is required to make a formal diagnosis of aMCI, it would be interesting if it could be used to predict the amyloid status of patients with aMCI.