Structure and function of neocortical layer 6b.
acetylcholine
dopamine
layer 6b
neocortex
neuromodulation
neurotensin
orexin (hypocretin)
synaptic connectivity patterns
Journal
Frontiers in cellular neuroscience
ISSN: 1662-5102
Titre abrégé: Front Cell Neurosci
Pays: Switzerland
ID NLM: 101477935
Informations de publication
Date de publication:
2023
2023
Historique:
received:
13
07
2023
accepted:
14
08
2023
medline:
25
9
2023
pubmed:
25
9
2023
entrez:
25
9
2023
Statut:
epublish
Résumé
Cortical layer 6b is considered by many to be a remnant of the subplate that forms during early stages of neocortical development, but its role in the adult is not well understood. Its neuronal complement has only recently become the subject of systematic studies, and its axonal projections and synaptic input structures have remained largely unexplored despite decades of research into neocortical function. In recent years, however, layer 6b (L6b) has attracted increasing attention and its functional role is beginning to be elucidated. In this review, I will attempt to provide an overview of what is currently known about the excitatory and inhibitory neurons in this layer, their pre- and postsynaptic connectivity, and their functional implications. Similarities and differences between different cortical areas will be highlighted. Finally, layer 6b neurons are highly responsive to several neuropeptides such as orexin/hypocretin, neurotensin and cholecystokinin, in some cases exclusively. They are also strongly controlled by neurotransmitters such as acetylcholine and norepinephrine. The interaction of these neuromodulators with L6b microcircuitry and its functional consequences will also be discussed.
Identifiants
pubmed: 37744882
doi: 10.3389/fncel.2023.1257803
pmc: PMC10516558
doi:
Types de publication
Journal Article
Review
Langues
eng
Pagination
1257803Informations de copyright
Copyright © 2023 Feldmeyer.
Déclaration de conflit d'intérêts
The author declares that the research was conducted in the absence of any commercial or financial relationships that could be construed as a potential conflict of interest. The author declared that they were an editorial board member of Frontiers, at the time of submission. This had no impact on the peer review process and the final decision.
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