Differences in prefrontal cortex activation and deactivation during strategic episodic verbal memory encoding in mild cognitive impairment

Autor(es)

Balardin, Joana B. ^{[1, 2]} ; Batistuzzo, Marcelo C. ^[2] ; Moraes Martin, Maria da Graca ^[2] ; Sato, Joao R. ^[3] ; Smid, Jerusa ^[1] ; Porto, Claudia ^[1] ; Savage, Cary R. ^[4] ; Nitrini, Ricardo ^[1] ; Amaro, Jr., Edson ^[2] ; Miotto, Eliane C. ^[1]

Afiliação do(s) autor(es)

^[1] Univ Sao Paulo, Fac Med, Dept Neurol, BR-05403001 Sao Paulo, SP - Brazil

^[2] Univ Sao Paulo, Fac Med, Dept Radiol, BR-05403001 Sao Paulo, SP - Brazil

^[3] Univ Fed ABC, Ctr Matemat Comp & Cognicao, Santo Andre - Brazil

^[4] Univ Kansas, Dept Psychiat & Behav Sci, Ctr Hlth Behav Neurosci, Kansas City, KS - USA

• Tipo de documento: Artigo Científico
• Fonte: FRONTIERS IN AGING NEUROSCIENCE; v. 7, AUG 4 2015.
• Citações Web of Science: 6

Resumo

In this study we examined differences in fMRI activation and deactivation patterns during episodic verbal memory encoding between individuals with MCI (n = 18) and healthy controls (HCs) (n = 17). Participants were scanned in two different sessions during the application of self-initiated or directed instructions to apply semantic strategies at encoding of word lists. MCI participants showed reduced free recall scores when using self-initiated encoding strategies that were increased to baseline controls' level after directed instructions were provided. During directed strategic encoding, greater recruitment of frontoparietal regions was observed in both MCI and control groups; group differences between sessions were observed in the ventromedial prefrontal cortex and the right superior frontal gyrus. This study provides evidence suggesting that differences of activity in these regions may be related to encoding deficits in MCI, possibly mediating executive functions during task performance. (AU)

• Processo FAPESP: 09/09924-5 - Análise do correlato neural associado aos efeitos do treinamento cognitivo semântico sobre a memória episódica em pacientes com CCL por ressonância magnética funcional
• Beneficiário: Joana Bisol Balardin
• Modalidade de apoio: Bolsas no Brasil - Doutorado
• Processo FAPESP: 05/56464-9 - Centro de Imagem em Neurociências da Faculdade de Medicina da Universidade de São Paulo
• Beneficiário: Giovanni Guido Cerri
• Modalidade de apoio: Auxílio à Pesquisa - Programa CINAPCE - Temático