Navigation using global or local reference frames in rats with medial and lateral entorhinal cortex lesions. 2021

Julien Poitreau, and Manon Buttet, and Christine Manrique, and Bruno Poucet, and Francesca Sargolini, and Etienne Save
Laboratory of Cognitive Neuroscience, Marseille, France.

The medial (MEC) and the lateral (LEC) regions of the entorhinal cortex send a major input to the hippocampus and have been proposed to play a foremost role in combining spatial and non-spatial attributes of episodic memory. In addition, it has been recently suggested that the MEC is involved in the processing of information in a global reference frame and the LEC in the processing of information in a local reference frame. Whether these putative functions could be generalized to navigation contexts has not been established yet. To address this hypothesis, rats with MEC or LEC NMDA-induced lesions were trained in two versions of a navigation task in the water maze, a global cue condition in which they had to use distal room cues and a local cue condition in which they had to use 3 objects placed in the pool. In the global cue condition, MEC-lesioned rats exhibited slower acquisition and were not able to precisely locate the submerged platform during the probe trial. In contrast LEC-lesioned rats exhibited control-like performance. In the local cue condition, navigational abilities were spared in both lesion groups. In addition when the 3 different objects were replaced by 3 identical objects, all groups maintained their navigation accuracy suggesting that the identity of objects is not crucial for place navigation. Overall, the results indicate that the MEC is necessary for place navigation using a global reference frame. In contrast, navigation using a local reference frame does not require the LEC nor the MEC.

UI MeSH Term Description Entries
D008297 Male Males
D000818 Animals Unicellular or multicellular, heterotrophic organisms, that have sensation and the power of voluntary movement. Under the older five kingdom paradigm, Animalia was one of the kingdoms. Under the modern three domain model, Animalia represents one of the many groups in the domain EUKARYOTA. Animal,Metazoa,Animalia
D001522 Behavior, Animal The observable response an animal makes to any situation. Autotomy Animal,Animal Behavior,Animal Behaviors
D051381 Rats The common name for the genus Rattus. Rattus,Rats, Laboratory,Rats, Norway,Rattus norvegicus,Laboratory Rat,Laboratory Rats,Norway Rat,Norway Rats,Rat,Rat, Laboratory,Rat, Norway,norvegicus, Rattus
D018728 Entorhinal Cortex Cerebral cortex region on the medial aspect of the PARAHIPPOCAMPAL GYRUS, immediately caudal to the OLFACTORY CORTEX of the uncus. The entorhinal cortex is the origin of the major neural fiber system afferent to the HIPPOCAMPAL FORMATION, the so-called PERFORANT PATHWAY. Brodmann Area 28,Brodmann Area 34,Brodmann's Area 28,Brodmann's Area 34,Entorhinal Area,Area Entorhinalis,Entorhinal Cortices,Secondary Olfactory Cortex,Area 28, Brodmann,Area 28, Brodmann's,Area 34, Brodmann,Area 34, Brodmann's,Area, Entorhinal,Brodmanns Area 28,Brodmanns Area 34,Cortex, Entorhinal,Cortex, Secondary Olfactory,Entorhinal Areas,Olfactory Cortex, Secondary,Secondary Olfactory Cortices
D018782 Maze Learning Learning the correct route through a maze to obtain reinforcement. It is used for human or animal populations. (Thesaurus of Psychological Index Terms, 6th ed) Maze Test,Learning, Maze,Maze Learnings,Maze Tests
D020318 Rats, Long-Evans An outbred strain of rats developed in 1915 by crossing several Wistar Institute white females with a wild gray male. Inbred strains have been derived from this original outbred strain, including Long-Evans cinnamon rats (RATS, INBRED LEC) and Otsuka-Long-Evans-Tokushima Fatty rats (RATS, INBRED OLETF), which are models for Wilson's disease and non-insulin dependent diabetes mellitus, respectively. Long-Evans Rat,Long Evans Rats,Evans Rats, Long,Long Evans Rat,Long-Evans Rats,Rat, Long-Evans,Rats, Long Evans
D065854 Spatial Navigation Process by which organisms use various cues to develop a route to a destination and their ability to travel such a planned route. Spatial Ability,Spatial Visualization,Abilities, Spatial,Ability, Spatial,Navigation, Spatial,Navigations, Spatial,Spatial Abilities,Spatial Navigations,Spatial Visualizations,Visualization, Spatial,Visualizations, Spatial

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