Entorhinal Layer II Calbindin-Expressing Neurons Originate Widespread Telencephalic and Intrinsic Projections.
commissural projections
connectivity
lateral entorhinal cortex
long-range intrinsic projections
medial entorhinal cortex
parahippocampus
rodent
Journal
Frontiers in systems neuroscience
ISSN: 1662-5137
Titre abrégé: Front Syst Neurosci
Pays: Switzerland
ID NLM: 101477946
Informations de publication
Date de publication:
2019
2019
Historique:
received:
23
05
2019
accepted:
30
09
2019
entrez:
5
11
2019
pubmed:
5
11
2019
medline:
5
11
2019
Statut:
epublish
Résumé
In the present study we provide the first systematic and quantitative hodological study of the calbindin-expressing (CB+) principal neurons in layer II of the entorhinal cortex and compared the respective projections of the lateral and medial subdivisions of the entorhinal cortex. Using elaborate quantitative retrograde tracing, complemented by anterograde tracing, we report that the layer II CB+ population comprises neurons with diverse, mainly excitatory projections. At least half of them originate local intrinsic and commissural projections which distribute mainly to layer I and II. We further show that long-range CB+ projections from the two entorhinal subdivisions differ substantially in that MEC projections mainly target field CA1 of the hippocampus, whereas LEC CB+ projections distribute much more widely to a substantial number of known forebrain targets. This connectional difference between the CB+ populations in LEC and MEC is reminiscent of the overall projection pattern of the two entorhinal subdivisions.
Identifiants
pubmed: 31680885
doi: 10.3389/fnsys.2019.00054
pmc: PMC6803526
doi:
Types de publication
Journal Article
Langues
eng
Pagination
54Informations de copyright
Copyright © 2019 Ohara, Gianatti, Itou, Berndtsson, Doan, Kitanishi, Mizuseki, Iijima, Tsutsui and Witter.
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