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Hippocampal–anterior thalamic pathways for memory: uncovering a network of direct and indirect actions

This review charts recent advances from a variety of disciplines that create a new perspective on why the multiple hippocampal–anterior thalamic interconnections are together vital for human episodic memory and rodent event memory. Evidence has emerged for the existence of a series of parallel tempo...

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Detalles Bibliográficos
Autores principales: Aggleton, John P, O’Mara, Shane M, Vann, Seralynne D, Wright, Nick F, Tsanov, Marian, Erichsen, Jonathan T
Formato: Texto
Lenguaje:English
Publicado: Blackwell Publishing Ltd 2010
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2936113/
https://www.ncbi.nlm.nih.gov/pubmed/20550571
http://dx.doi.org/10.1111/j.1460-9568.2010.07251.x
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author Aggleton, John P
O’Mara, Shane M
Vann, Seralynne D
Wright, Nick F
Tsanov, Marian
Erichsen, Jonathan T
author_facet Aggleton, John P
O’Mara, Shane M
Vann, Seralynne D
Wright, Nick F
Tsanov, Marian
Erichsen, Jonathan T
author_sort Aggleton, John P
collection PubMed
description This review charts recent advances from a variety of disciplines that create a new perspective on why the multiple hippocampal–anterior thalamic interconnections are together vital for human episodic memory and rodent event memory. Evidence has emerged for the existence of a series of parallel temporal–diencephalic pathways that function in a reciprocal manner, both directly and indirectly, between the hippocampal formation and the anterior thalamic nuclei. These extended pathways also involve the mammillary bodies, the retrosplenial cortex and parts of the prefrontal cortex. Recent neuropsychological findings reveal the disproportionate importance of these hippocampal–anterior thalamic systems for recollective rather than familiarity-based recognition, while anatomical studies highlight the precise manner in which information streams are kept separate but can also converge at key points within these pathways. These latter findings are developed further by electrophysiological stimulation studies showing how the properties of the direct hippocampal–anterior thalamic projections are often opposed by the indirect hippocampal projections via the mammillary bodies to the thalamus. Just as these hippocampal–anterior thalamic interactions reflect an interdependent system, so it is also the case that pathology in one of the component sites within this system can induce dysfunctional changes to distal sites both directly and indirectly across the system. Such distal effects challenge more traditional views of neuropathology as they reveal how extensive covert pathology might accompany localised overt pathology, and so impair memory.
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spelling pubmed-29361132010-09-17 Hippocampal–anterior thalamic pathways for memory: uncovering a network of direct and indirect actions Aggleton, John P O’Mara, Shane M Vann, Seralynne D Wright, Nick F Tsanov, Marian Erichsen, Jonathan T Eur J Neurosci Reviews This review charts recent advances from a variety of disciplines that create a new perspective on why the multiple hippocampal–anterior thalamic interconnections are together vital for human episodic memory and rodent event memory. Evidence has emerged for the existence of a series of parallel temporal–diencephalic pathways that function in a reciprocal manner, both directly and indirectly, between the hippocampal formation and the anterior thalamic nuclei. These extended pathways also involve the mammillary bodies, the retrosplenial cortex and parts of the prefrontal cortex. Recent neuropsychological findings reveal the disproportionate importance of these hippocampal–anterior thalamic systems for recollective rather than familiarity-based recognition, while anatomical studies highlight the precise manner in which information streams are kept separate but can also converge at key points within these pathways. These latter findings are developed further by electrophysiological stimulation studies showing how the properties of the direct hippocampal–anterior thalamic projections are often opposed by the indirect hippocampal projections via the mammillary bodies to the thalamus. Just as these hippocampal–anterior thalamic interactions reflect an interdependent system, so it is also the case that pathology in one of the component sites within this system can induce dysfunctional changes to distal sites both directly and indirectly across the system. Such distal effects challenge more traditional views of neuropathology as they reveal how extensive covert pathology might accompany localised overt pathology, and so impair memory. Blackwell Publishing Ltd 2010-06 /pmc/articles/PMC2936113/ /pubmed/20550571 http://dx.doi.org/10.1111/j.1460-9568.2010.07251.x Text en Journal compilation © 2010 Federation of European Neuroscience Societies and Blackwell Publishing Ltd http://creativecommons.org/licenses/by/2.5/ Re-use of this article is permitted in accordance with the Creative Commons Deed, Attribution 2.5, which does not permit commercial exploitation.
spellingShingle Reviews
Aggleton, John P
O’Mara, Shane M
Vann, Seralynne D
Wright, Nick F
Tsanov, Marian
Erichsen, Jonathan T
Hippocampal–anterior thalamic pathways for memory: uncovering a network of direct and indirect actions
title Hippocampal–anterior thalamic pathways for memory: uncovering a network of direct and indirect actions
title_full Hippocampal–anterior thalamic pathways for memory: uncovering a network of direct and indirect actions
title_fullStr Hippocampal–anterior thalamic pathways for memory: uncovering a network of direct and indirect actions
title_full_unstemmed Hippocampal–anterior thalamic pathways for memory: uncovering a network of direct and indirect actions
title_short Hippocampal–anterior thalamic pathways for memory: uncovering a network of direct and indirect actions
title_sort hippocampal–anterior thalamic pathways for memory: uncovering a network of direct and indirect actions
topic Reviews
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2936113/
https://www.ncbi.nlm.nih.gov/pubmed/20550571
http://dx.doi.org/10.1111/j.1460-9568.2010.07251.x
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