Formation of the circle of Willis during human embryonic development
| Autor: | Taiga Muranaka, Tetsuya Takakuwa, Shigehito Yamada, Chigako Uwabe, Teppei Koike |
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| Rok vydání: | 2016 |
| Předmět: |
Embryology
medicine.medical_specialty business.industry General Medicine Anatomy 030204 cardiovascular system & hematology Surgery 03 medical and health sciences 0302 clinical medicine Carnegie stages medicine.artery Pediatrics Perinatology and Child Health Medicine Human embryogenesis business 030217 neurology & neurosurgery Circulatory anastomosis Developmental Biology Circle of Willis |
| Zdroj: | Congenital Anomalies. 56:233-236 |
| ISSN: | 0914-3505 |
| DOI: | 10.1111/cga.12165 |
| Popis: | The circle of Willis (CW) is a circulatory anastomosis that supplies blood to the brain and adjacent structures. We examined the timing of formation of CW in 20 Japanese human embryo samples by using 3-dimensional reconstruction of serial histological sections. The CW was closed in 1 (n = 6), 2 (n = 8), 2 (n = 3) and 2 (n = 3) samples at Carnegie stages 20, 21, 22, and 23, respectively. The CW was unclosed in 13 samples (unclosed at ACOM alone, 6 samples; ACOM and bilateral P1, 4; left PCOM and right P1, 1; right PCOM and right P1, 1; ACOM and left PCOM, 1). It was difficult to predict whether the circle would close during further development, as such variations frequently exist in adults. This article is protected by copyright. All rights reserved. |
| Databáze: | OpenAIRE |
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