Conférence
Notice
Langue :
Anglais
Conditions d'utilisation
Attribution-NonCommercial 4.0 International (CC BY-NC 4.0)
DOI : 10.60527/hvwv-zv03
Citer cette ressource :
LLF. (2021, 20 mai). How Do Pre- and Post-Encoding Processes Affect Episodic Memory? , in Dialogue, Memory and Emotion. [Vidéo]. Canal-U. https://doi.org/10.60527/hvwv-zv03. (Consultée le 19 juillet 2024)

How Do Pre- and Post-Encoding Processes Affect Episodic Memory?

Réalisation : 20 mai 2021 - Mise en ligne : 21 juin 2021
  • document 1 document 2 document 3
  • niveau 1 niveau 2 niveau 3
Descriptif

What post-encoding processes cause forgetting? For decades there had been controversy as to whether forgetting is caused by decay over time or by interference from irrelevant information, and a coherent account for forgetting was lacking. My colleagues and I have proposed the Representation Theory of Forgetting, according to which forgetting can occur either due to decay or due to interference, depending on the nature of the memory-representation and the brain-structure supporting it. The hippocampus—a structure playing a crucial role in recollection—has a unique neurobiological property, termed pattern-separation, which enables it to represent similar memories in orthogonal patterns. In contrast, familiarity-based memories, supported by extrahippocampal structures are not represented in orthogonal patterns. Therefore, hippocampal-memories will be relatively resistant to interference from one another, but susceptible to decay over time; the reverse would be true for extrahippocampal-memories. In my talk, I will present behavioural evidence in support of our theory.

In addition, I will present a related research program, in which I ask whether memory is affected not only by post-encoding processes (like decay and interference), but also by processes occurring prior to encoding. I hypothesize that the scaffold of a memory engram is spontaneously laid even before the experience occurs. In support of this hypothesis, we have shown— using multivoxel-pattern-analysis of fMRI data—that the mnemonic fate of information depends on whether spontaneous neural representations prior to perceiving the information are reinstated during encoding.

Thème

Dans la même collection

Sur le même thème