RT Journal Article
T1 Neuropsychological, Metabolic, and Connectivity Underpinnings of Semantic Interference Deficits Using the LASSI-L
A1 Valles-Salgado, María
A1 Cabrera Martín, María Nieves
A1 Curiel-Cid, Rosie E.
A1 Delgado Álvarez, Alfonso
A1 Delgado-Alonso, Cristina
A1 Gil-Moreno, María José
A1 Matías-Guiu Guía, Jorge
A1 Loewenstein, David A.
A1 Matias-Guiu, Jordi A.
AB Background: LASSI-L is a novel neuropsychological test specifically designed for the early diagnosis of Alzheimer’s disease (AD) based on semantic interference. Objective: To examine the cognitive and neural underpinnings of the failure to recover from proactive semantic and retroactive semantic interference. Methods: One hundred and fifty-five patients consulting for memory loss were included. Patients underwent neuropsychological assessment, including the LASSI-L, and FDG-PET imaging. They were categorized as subjective memory complaints (SMC) (n=32), pre-mild cognitive impairment (MCI) due to AD (Pre-MCI) (n=39), MCI due to AD (MCI-AD) (n=71), and MCI without evidence of neurodegeneration (MCI-NN) (n=13). Voxel-based brain mapping and metabolic network connectivity analyses were conducted. Results: A significant group effect was found for all the LASSI-L scores. LASSI-L scores measuring failure to recover from proactive semantic interference and retroactive semantic interference were predicted by other neuropsychological tests with a precision of 64.1 and 44.8%. The LASSI-L scores were associated with brain metabolism in the bilateral precuneus, superior, middle and inferior temporal gyri, fusiform, angular, superior and inferior parietal lobule, superior, middle and inferior occipital gyri, lingual gyrus, and posterior cingulate. Connectivity analysis revealed a decrease of node degree and centrality in posterior cingulate in patients showing frPSI. Conclusion: Episodic memory dysfunction and the involvement of the medial temporal lobe, precuneus and posterior cingulate constitute the basis of the failure to recover from proactive semantic interference and retroactive semantic interference. These findings support the role of the LASSI-L in the detection, monitoring and outcome prediction during the early stages of AD.
PB IOS Press
SN 1387-2877
SN 1875-8908
YR 2022
FD 2022-11-08
LK https://hdl.handle.net/20.500.14352/104147
UL https://hdl.handle.net/20.500.14352/104147
LA eng
NO Instituto de Salud Carlos III
NO European Commission
NO National Institute of Aging
DS Docta Complutense
RD 12 abr 2025