Memory Allocation: Mechanisms and Function.
Annu Rev Neurosci
; 41: 389-413, 2018 07 08.
Article
en En
| MEDLINE
| ID: mdl-29709212
ABSTRACT
Memories for events are thought to be represented in sparse, distributed neuronal ensembles (or engrams). In this article, we review how neurons are chosen to become part of a particular engram, via a process of neuronal allocation. Experiments in rodents indicate that eligible neurons compete for allocation to a given engram, with more excitable neurons winning this competition. Moreover, fluctuations in neuronal excitability determine how engrams interact, promoting either memory integration (via coallocation to overlapping engrams) or separation (via disallocation to nonoverlapping engrams). In parallel with rodent studies, recent findings in humans verify the importance of this memory integration process for linking memories that occur close in time or share related content. A deeper understanding of allocation promises to provide insights into the logic underlying how knowledge is normally organized in the brain and the disorders in which this process has gone awry.
Palabras clave
Texto completo:
1
Colección:
01-internacional
Banco de datos:
MEDLINE
Asunto principal:
Encéfalo
/
Memoria
/
Neuronas
Límite:
Animals
/
Humans
Idioma:
En
Revista:
Annu Rev Neurosci
Año:
2018
Tipo del documento:
Article