Correlation of external ear auricle formation with staging of human embryos
| Autor: | Maimi Ozeki-Sato, Tetsuya Takakuwa, Shigehito Yamada, Chigako Uwabe, Koichi Ishizu |
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| Rok vydání: | 2016 |
| Předmět: |
0301 basic medicine
Auricle Embryology Cartilage Mesenchyme Embryo General Medicine Anatomy 030105 genetics & heredity Biology Embryo staging 03 medical and health sciences 030104 developmental biology medicine.anatomical_structure Carnegie stages Pediatrics Perinatology and Child Health medicine Ear Auricle Developmental Biology |
| Zdroj: | Congenital Anomalies. 56:86-90 |
| ISSN: | 0914-3505 |
| DOI: | 10.1111/cga.12140 |
| Popis: | The formation of auricles in human embryos was evaluated between Carnegie stage (CS)19 and CS23, and the findings were correlated across the stages. The auricle was categorized into 11 steps according to Streeter's criteria with modifications. Mesenchyme cell condensation was observed at Step 7, and two layers of cartilage consisting of the auricle were recognized at Step 11. The representative steps at each CS shifted from Step 3 to Step 11 during CS16 and CS23, although several steps overlapped between adjacent CSs. These results indicate that observations of the auricle between CS19 and CS23 may be utilized for determining embryo staging as convincing supportive evidence of external features reflecting the internal histological structure, although other findings should also be taken into account. |
| Databáze: | OpenAIRE |
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