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Lateral entorhinal cortex lesions impair both egocentric and allocentric object-place associations


Kuruvilla, MV and Wilson, DIG and Ainge, JA, Lateral entorhinal cortex lesions impair both egocentric and allocentric object-place associations, Brain and Neuroscience Advances pp. 1-11. ISSN 2398-2128 (2020) [Refereed Article]

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DOI: doi:10.1177/2398212820939463


During navigation, landmark processing is critical either for generating an allocentric-based cognitive map or in facilitating egocentric-based strategies. Increasing evidence from manipulation and single-unit recording studies has highlighted the role of the entorhinal cortex in processing landmarks. In particular, the lateral (LEC) and medial (MEC) sub-regions of the entorhinal cortex have been shown to attend to proximal and distal landmarks, respectively. Recent studies have identified a further dissociation in cue processing between the LEC and MEC based on spatial frames of reference. Neurons in the LEC preferentially encode egocentric cues while those in the MEC encode allocentric cues. In this study, we assessed the impact of disrupting the LEC on landmark-based spatial memory in both egocentric and allocentric reference frames. Animals that received excitotoxic lesions of the LEC were significantly impaired, relative to controls, on both egocentric and allocentric versions of an object-place association task. Notably, LEC lesioned animals performed at chance on the egocentric version but above chance on the allocentric version. There was no significant difference in performance between the two groups on an object recognition and spatial T-maze task. Taken together, these results indicate that the LEC plays a role in feature integration more broadly and in specifically processing spatial information within an egocentric reference frame.

Item Details

Item Type:Refereed Article
Keywords:hippocampus, entorhinal cortex, memory, navigation, Alzheimer's disease
Research Division:Psychology
Research Group:Biological psychology
Research Field:Behavioural neuroscience
Objective Division:Health
Objective Group:Other health
Objective Field:Other health not elsewhere classified
UTAS Author:Kuruvilla, MV (Dr Maneesh Kuruvilla)
ID Code:155160
Year Published:2020
Deposited By:Wicking Dementia Research and Education Centre
Deposited On:2023-01-31
Last Modified:2023-01-31

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