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2017 Fiscal Year Final Research Report

Comparative and experimental embryological analysis to understand anatomical construction of the vertebrate neck

Research Project

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Project/Area Number 15K08130
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Research Field General anatomy (including histology/embryology)
Research InstitutionNiigata University

Principal Investigator

Nagashima Hiroshi  新潟大学, 医歯学系, 准教授 (40435665)

Project Period (FY) 2015-04-01 – 2018-03-31
Keywords実験発生学
Outline of Final Research Achievements

The skeleton of pectoral appendage is comprised of endochondral and dermal bones. The former develops via ossification of cartilaginous mold, and includes the majority of the appendage skeleton. The latter develops by the ossification of connective tissue and does not require the cartilaginous mold, and includes the clavicle in human. In fishes also, the majority of the pectoral fin skeletons develops through the endochondral ossification and they are connected to the skull via dermal bones including the clavicle. In human, the pectoral limb skeleton is separated from the head with neck region. To elucidate the evolutionary mechanism of the neck elongation, chicken development was observed. In early embryos, the forelimb was connected with head via the clavicle as that in fishes. The result indicated that the long neck had been obtained by elongating the clavicle.

Free Research Field

比較・実験発生学

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Published: 2019-03-29  

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