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 Printable version |
Towards a redefinition of memory systems based on cerebral connectivity |
Revue de neuropsychologie. Volume 3, Number 2, 112-9, Juin 2011, Dossier
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 Résumé
Texte intégral
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Author(s) : Pierre Gagnepain |
Summary :
The broader debate over the fractionation of memory into distinct memory systems may be relevant to explain behavioural performances in amnesic patients and healthy subjects but multiple memory systems or processes may not necessarily have spatially-segregated or independently-operating implementation in the brain. In the recognition memory literature, the debate over whether recollection and familiarity are qualitatively different memory processes with spatially distinct components within the medial temporal lobe speaks to this issue. Here, I will introduce a new perspective recently proposed by Henson and Gagnepain (2010) which suggests that multiple memory systems arise at different stages of interaction within a hierarchy of brain regions. These interactions refer to the idea that the brain is constantly trying to predict through backward connection the flow of forwarded sensory evidence about current item. Importantly, the nature of encoding and retrieval (i.e. recollection vs familiarity) is related to a single principle – the minimization of the resulting “prediction error” – and is driven by the pattern of connectivity between different levels of representation. To illustrate my point, I will present recent findings which emphasise the benefit of effective connectivity over local pattern of functional magnetic resonance imaging response to map psychological processes such as recollection and familiarity onto the brain. |
Keywords : memory systems, recollection/familiarity, brain connectivity |
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