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出典(authority):フリー百科事典『ウィキペディア(Wikipedia)』「2015/09/18 16:28:34」(JST)
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Somitomeres |
Details |
Latin |
somitomera |
Carnegie stage |
11 |
Days |
third gestational week |
Precursor |
paraxial mesoderm |
Gives rise to |
somites |
Identifiers |
Code |
TE E5.0.2.2.2.0.2 |
Anatomical terminology |
In the developing vertebrate embryo, the somitomeres (or somatomeres)[1]are cells that are derived from the loose masses of paraxial mesoderm that are found alongside the developing neural tube. In human embryogenesis they appear towards the end of the third gestational week. The approximately 50 pairs of somitomeres in the human embryo, begin developing in the cranial (head) region, continuing in a caudal (tail) direction until the end of week four.
Development
The first seven somitomeres give rise to the striated muscles of the face, jaws, and throat.[2]
The remaining somitomeres, likely driven by periodic expression of the hairy gene, begin expressing adhesion proteins such as N-cadherin and fibronectin, compact, and bud off forming somites. The somites give rise to the vertebral column (sclerotome), associated muscles (myotome), and overlying dermis (dermatome). There are a total of 37 somite pairs at the end of the fifth week of development, after the first occipital somite and 5-7 coccygeal somites disappear from the original 42-44 somites
References
- ^ Antonio Nanci (2008). Ten Cate's oral histology: development, structure, and function. Elsevier Health Sciences. pp. 25–. ISBN 978-0-323-04557-5. Retrieved 16 April 2010.
- ^ Larsen W.J. Human Embryology. Churchill Livingstone.Third edition 2001.Page 62. ISBN 0-443-06583-7
External links
- Swiss embryology (from UL, UB, and UF) hdisqueembry/triderm07 - look for Fig. 16
Human embryogenesis in the first three weeks
|
|
Week 1 |
- Fertilization
- Oocyte activation
- Zygote
- Cleavage
- Blastomere
- Morula
- Blastocoele
- Blastocyst
- Blastula
- Inner cell mass
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|
Week 2
(Bilaminar) |
|
|
Week 3
(Trilaminar) |
Germ layers |
- Archenteron/Primitive streak
- Primitive pit
- Primitive knot/Blastopore
- Primitive groove
- Gastrula
- Regional specification
- Embryonic disc
|
|
Ectoderm |
- Surface ectoderm
- Neuroectoderm
- Somatopleuric mesenchyme
- Neurulation
- Neural crest
|
|
Endoderm |
- Splanchnopleuric mesenchyme
|
|
Mesoderm |
- Axial mesoderm
- Paraxial
- Intermediate
- Lateral plate
- Intraembryonic coelom
- Splanchnopleuric mesenchyme
- Somatopleuric mesenchyme
|
|
|
Index of developmental medicine
|
|
Description |
- Embryology
- Cell lines
- Stem cells
- endoderm
- mesoderm
- ectoderm
|
|
Disease |
- Due to toxins
- Syndromes
- Chromosomal
- Neonate
- Twins
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English Journal
- Embryonic and postnatal development of masticatory and tongue muscles.
- Yamane A1.
- Cell and tissue research.Cell Tissue Res.2005 Nov;322(2):183-9. Epub 2005 Nov 3.
- This review summarizes findings concerning the unique developmental characteristics of mouse head muscles (mainly the masticatory and tongue muscles) and compares their characteristics with those of other muscles. The developmental origin of the masticatory muscles is the somitomeres, whereas the to
- PMID 16041600
- The bHLH class protein pMesogenin1 can specify paraxial mesoderm phenotypes.
- Yoon JK1, Moon RT, Wold B.
- Developmental biology.Dev Biol.2000 Jun 15;222(2):376-91.
- A new bHLH gene from mouse that we call pMesogenin1 (referring to paraxial mesoderm-specific expression and regulatory capacities) and its candidate ortholog from Xenopus were isolated and studied comparatively. In both organisms the gene is specifically expressed in unsegmented paraxial mesoderm an
- PMID 10837126
- Periodic repression of Notch pathway genes governs the segmentation of Xenopus embryos.
- Jen WC1, Gawantka V, Pollet N, Niehrs C, Kintner C.
- Genes & development.Genes Dev.1999 Jun 1;13(11):1486-99.
- During the development of the vertebrate embryo, genes encoding components of the Notch signaling pathway are required for subdividing the paraxial mesoderm into repeating segmental structures, called somites. These genes are thought to act in the presomitic mesoderm when cells form prospective somi
- PMID 10364164
Japanese Journal
- Development of the Facial Midline
- CARSTENS Michael H.
- The Journal of craniofacial surgery 13(1), 129-187, 2002-01-01
- NAID 10016384560
- Segmental distribution of the motoneurons innervating trunk muscles in the spinal cord of the cat and rat
- IZUMI Akira,KIDA Masahiko Y
- Neuroscience research : the official journal of the Japan Neuroscience Society 30(3), 247-255, 1998-03
- NAID 10005829927
Related Links
- somitomere a segment of paraxial mesoderm. ... Disclaimer All content on this website, including dictionary, thesaurus, literature, geography, and other reference data is for informational purposes only.
- somitomere a segment of paraxial mesoderm. ... Disclaimer All content on this website, including dictionary, thesaurus, literature, geography, and other reference data is for informational purposes only.
Related Pictures
★リンクテーブル★
[★]
- 英
- somitomere
- 関
- 体節、沿軸中胚葉、中胚葉、三胚葉から形成されるもの
[★]
- 英
- somitomere
- 関
- ソミトメア、体節分節
[★]
- 英
- somitomere
- 関
- 体節球、体節分節