Changes in topographical relation between the ductus arteriosus and left subclavian artery in human embryos: a study using serial sagittal sections

• Autorzy: Jin Z.W. , Yamamoto M. , Kim J.H. , Murakami G. , Wilting J. , Rodriguez-Vazguez J.F.
• Języki publikacji: EN

Abstrakty

EN

Background: At birth, the ductus arteriosus (DA) merges with the aortic arch in the slightly caudal side of the origin of the left subclavian artery (SCA). Since the SCAs (7th segmental arteries) were fixed on the level of the 7th cervical-first thoracic vertebral bodies, the confluence of DA should migrate caudally. We aimed to describe timing and sequence of the topographical change using serial sagittal sections of 36 human embryos and foetuses (CRL 8–64 mm; 5–10 weeks), Those made easy evaluation of the vertebral levels possible in a few section. Materials and methods: The DA or 6th pharyngeal arch artery seemed to slide down in front of the sympathetic nerve trunk along 1.0–1.2 mm from the second cervical vertebral level at 5–6 weeks and, at 6 weeks (CRL 14–17 mm), the DA confluence with aorta reached the 7th cervical level. Because of the highly elongated common carotid artery, the sliding of DA confluence seemed to be much shorter than the cervical vertebrae growing from 1 mm to 2.4 mm. Results: At the final topographical change at 6–7 weeks, the DA confluence further descended to a site 1-vertebral length below the left SCA origin. From 6 to 9 weeks, a distance from the top of the aortic arch to the left SCA origin was almost stable: 0.3–0.5 mm at 6 weeks and 0.4–0.6 mm at 9 weeks. Conclusions: The heart descent and the caudal extension of the trachea and bronchi, those occurred before the DA sliding, were likely to be a major driving force for the sliding. (Folia Morphol 2019; 78, 4: 720–728)

• Wydawca: -
• Czasopismo: Folia Morphologica
• Rocznik: 2019
• Tom: 78
• Numer: 4
• Opis fizyczny: p.720-728,fig.,ref.

Twórcy

autor

Jin Z.W.

• Department of Anatomy, Wuxi School of Medicine, Jiangnan University, Wuxi, China

autor

Yamamoto M.

• Department of Anatomy, Tokyo Dental College, Tokyo, Japan

autor

Kim J.H.

• Department of Anatomy, Chonbuk National University Medical School, Jeonju, Republic of Korea

autor

Murakami G.

• Division of Internal Medicine, Sapporo Asuka Hospital, Sapporo, Japan

autor

Wilting J.

• Institute of Anatomy and Cell Biology, School of Medicine, Georg-August-Universität Gőttingen, Germany

autor

Rodriguez-Vazguez J.F.

• Department of Anatomy and Human Embryology, Institute of Embryology, Faculty of Medicine, Complutense University, Madrid, Spain

Bibliografia

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Identyfikatory

DOI

10.5603/FM.a2019.0028