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The separate and combined properties of the granular (area 29) and dysgranular (area 30) retrosplenial cortex

Aggleton, John P. ORCID:, Yanakieva, Steliana ORCID:, Sengpiel, Frank ORCID: and Nelson, Andrew J. ORCID: 2021. The separate and combined properties of the granular (area 29) and dysgranular (area 30) retrosplenial cortex. Neurobiology of Learning and Memory 185 , 107516. 10.1016/j.nlm.2021.107516

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Retrosplenial cortex contains two principal subdivisions, area 29 (granular) and area 30 (dysgranular). Their respective anatomical connections in the rat brain reveal that area 29 is the primary recipient of hippocampal and parahippocampal spatial and contextual information while area 30 is the primary interactor with current visual information. Lesion studies and measures of neuronal activity in rodents indicate that retrosplenial cortex helps to integrate space from different perspectives, e.g., egocentric and allocentric, providing landmark and heading cues for navigation and spatial learning. It provides a repository of scene information that, over time, becomes increasingly independent of the hippocampus. These processes, reflect the interactive actions between areas 29 and 30, along with their convergent influences on cortical and thalamic targets. Consequently, despite their differences, both areas 29 and 30 are necessary for an array of spatial and learning problems.

Item Type: Article
Date Type: Publication
Status: Published
Schools: Psychology
Publisher: Elsevier
ISSN: 1074-7427
Date of First Compliant Deposit: 13 September 2021
Date of Acceptance: 30 August 2021
Last Modified: 01 Feb 2024 08:00

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