Local projections of layer Vb-to-Va are more prominent in lateral than in medial entorhinal cortex. 2021

Shinya Ohara, and Stefan Blankvoort, and Rajeevkumar Raveendran Nair, and Maximiliano J Nigro, and Eirik S Nilssen, and Clifford Kentros, and Menno P Witter
Kavli institute for Systems Neuroscience, Center for Computational Neuroscience, Egil and Pauline Braathen and Fred Kavli Center for Cortical Microcircuits, NTNU Norwegian University of Science and Technology, Trondheim, Norway.

The entorhinal cortex, in particular neurons in layer V, allegedly mediate transfer of information from the hippocampus to the neocortex, underlying long-term memory. Recently, this circuit has been shown to comprise a hippocampal output recipient layer Vb and a cortical projecting layer Va. With the use of in vitro electrophysiology in transgenic mice specific for layer Vb, we assessed the presence of the thus necessary connection from layer Vb-to-Va in the functionally distinct medial (MEC) and lateral (LEC) subdivisions; MEC, particularly its dorsal part, processes allocentric spatial information, whereas the corresponding part of LEC processes information representing elements of episodes. Using identical experimental approaches, we show that connections from layer Vb-to-Va neurons are stronger in dorsal LEC compared with dorsal MEC, suggesting different operating principles in these two regions. Although further in vivo experiments are needed, our findings imply a potential difference in how LEC and MEC mediate episodic systems consolidation.

UI MeSH Term Description Entries
D008297 Male Males
D008822 Mice, Transgenic Laboratory mice that have been produced from a genetically manipulated EGG or EMBRYO, MAMMALIAN. Transgenic Mice,Founder Mice, Transgenic,Mouse, Founder, Transgenic,Mouse, Transgenic,Mice, Transgenic Founder,Transgenic Founder Mice,Transgenic Mouse
D009474 Neurons The basic cellular units of nervous tissue. Each neuron consists of a body, an axon, and dendrites. Their purpose is to receive, conduct, and transmit impulses in the NERVOUS SYSTEM. Nerve Cells,Cell, Nerve,Cells, Nerve,Nerve Cell,Neuron
D005260 Female Females
D000069077 Memory Consolidation Neurological process involving the conversion of learned information into long-term memory. Consolidation, Memory,Consolidations, Memory,Memory Consolidations
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
D051379 Mice The common name for the genus Mus. Mice, House,Mus,Mus musculus,Mice, Laboratory,Mouse,Mouse, House,Mouse, Laboratory,Mouse, Swiss,Mus domesticus,Mus musculus domesticus,Swiss Mice,House Mice,House Mouse,Laboratory Mice,Laboratory Mouse,Mice, Swiss,Swiss Mouse,domesticus, Mus musculus
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

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