Novel concept for the epaxial/hypaxial boundary based on neuronal development.
development
diaphragm
epaxial/hypaxial
evolution
motor neuron
muscle
primaxial/abaxial
Journal
Journal of anatomy
ISSN: 1469-7580
Titre abrégé: J Anat
Pays: England
ID NLM: 0137162
Informations de publication
Date de publication:
09 2020
09 2020
Historique:
received:
30
08
2019
revised:
23
04
2020
accepted:
23
04
2020
pubmed:
14
8
2020
medline:
22
5
2021
entrez:
14
8
2020
Statut:
ppublish
Résumé
Trunk muscles in vertebrates are classified as either dorsal epaxial or ventral hypaxial muscles. Epaxial and hypaxial muscles are defined as muscles innervated by the dorsal and ventral rami of spinal nerves, respectively. Each cluster of spinal motor neurons passing through dorsal rami innervates epaxial muscles, whereas clusters traveling on the ventral rami innervate hypaxial muscles. Herein, we show that some motor neurons exhibiting molecular profiles for epaxial muscles follow a path in the ventral rami. Dorsal deep-shoulder muscles and some body wall muscles are defined as hypaxial due to innervation via the ventral rami, but a part of these ventral rami has the molecular profile of motor neurons that innervate epaxial muscles. Thus, the epaxial and hypaxial boundary cannot be determined simply by the ramification pattern of spinal nerves. We propose that, although muscle innervation occurs via the ventral rami, dorsal deep-shoulder muscles and some body wall muscles represent an intermediate group that lies between epaxial and hypaxial muscles.
Identifiants
pubmed: 32786168
doi: 10.1111/joa.13219
pmc: PMC7476185
doi:
Types de publication
Journal Article
Research Support, Non-U.S. Gov't
Langues
eng
Sous-ensembles de citation
IM
Pagination
427-438Informations de copyright
© 2020 Anatomical Society.
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