Myotome
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2008-06-19T20:30:33Z
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{{Infobox Embryology |
Name = Myotome |
Latin = |
GraySubject = 17 |
GrayPage = 80 |
Image = Gray65.png |
Caption = Scheme showing the manner in which each vertebral centrum is developed from portions of two adjacent segments. (Myotome labeled in upper right.) |
Image2 = Gray64.png |
Caption2 = Transverse section of a human embryo of the third week to show the differentiation of the primitive segment. ao. Aorta. m.p. Muscle-plate. n.c. Neural canal. sc. Sclerotome. s.p. cutis-plate. ("Muscle-plate" is an older term for "myotome.") |
System = |
CarnegieStage = 13/14 |
Precursor = [[somite]] |
GivesRiseTo = [[muscle]] |
MeshName = |
MeshNumber = |
DorlandsPre = m_25 |
DorlandsSuf = 12556517 |
}}
In [[vertebrate]] [[embryonic development]], a '''myotome''' is a group of tissues formed from [[somites]] that develop into the body wall muscle.
Each myotome divides into a [[Dorsum (biology)|dorsal]] [[epaxial]] part and a [[ventral]] [[hypaxial]] part.
The epaxial muscle mass loses its segmental character to form the [[extensor muscle]]s of the neck and trunk.
The [[myoblast]]s from the hypaxial division form the muscles of the thoracic and anterior abdominal walls.
The term "myotome" is also used to describe the muscles served by a single nerve.<ref>{{eMedicineDictionary|myotome}}</ref> It is the motor equivalent of a [[Dermatomic area|dermatome]].
==See also==
[[Dermatome (Anatomy)]]
==References==
{{Reflist}}
==External links==
* {{EmbryologyUNSW|Notes/skmus7}}
* {{EmbryologyUNSW|Notes/week3_6}}
* {{EmbryologyUNC|mslimb|009}}
{{Embryology}}
[[Category:Embryology]]
{{developmental-biology-stub}}
[[pt:Miótomo]]