Plasticity in the Working Memory System: Life Span Changes and Response to Injury

Overview

Journal Neuroscientist

Publisher Sage Publications

Specialty Neurology

Date 2017 Jul 11

PMID 28691573

Citations 13

Authors

Sean Froudist-Walsh

Diana Lopez-Barroso

Maria Jose Torres-Prioris

Paula L Croxson

Marcelo L Berthier

Affiliations

Soon will be listed here.

Abstract

Working memory acts as a key bridge between perception, long-term memory, and action. The brain regions, connections, and neurotransmitters that underlie working memory undergo dramatic plastic changes during the life span, and in response to injury. Early life reliance on deep gray matter structures fades during adolescence as increasing reliance on prefrontal and parietal cortex accompanies the development of executive aspects of working memory. The rise and fall of working memory capacity and executive functions parallels the development and loss of neurotransmitter function in frontal cortical areas. Of the affected neurotransmitters, dopamine and acetylcholine modulate excitatory-inhibitory circuits that underlie working memory, are important for plasticity in the system, and are affected following preterm birth and adult brain injury. Pharmacological interventions to promote recovery of working memory abilities have had limited success, but hold promise if used in combination with behavioral training and brain stimulation. The intense study of working memory in a range of species, ages and following injuries has led to better understanding of the intrinsic plasticity mechanisms in the working memory system. The challenge now is to guide these mechanisms to better improve or restore working memory function.

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