Significant Asymmetry of the Bilateral Upper Extremities of a Skeleton Excavated from the Mashiki-Azamabaru Site, Okinawa Island, Japan

The human skeleton of a young adult male with marked asymmetry of the bilateral upper extremities was excavated from the Mashiki-Azamabaru site (3000–2000 BCE) on the main island of Okinawa in the southwestern archipelago of Japan. The skeleton was buried alone in a corner of the cemetery. In this s...

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Autores principales:	Keiko Ogami-Takamura, Kazunobu Saiki, Keita Nishi, Tetsuaki Wakebe, Daisuke Endo, Kiyohito Murai, Yoshiatsu Naito, Toshiyuki Tsurumoto
Formato:	article
Lenguaje:	EN
Publicado:	Hindawi Limited 2021
Materias:	Medicine R
Acceso en línea:	https://doaj.org/article/4ef19fafcb7d445cb00422768d0d7a76
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spelling	oai:doaj.org-article:4ef19fafcb7d445cb00422768d0d7a762021-11-29T00:56:26ZSignificant Asymmetry of the Bilateral Upper Extremities of a Skeleton Excavated from the Mashiki-Azamabaru Site, Okinawa Island, Japan2314-614110.1155/2021/4884760https://doaj.org/article/4ef19fafcb7d445cb00422768d0d7a762021-01-01T00:00:00Zhttp://dx.doi.org/10.1155/2021/4884760https://doaj.org/toc/2314-6141The human skeleton of a young adult male with marked asymmetry of the bilateral upper extremities was excavated from the Mashiki-Azamabaru site (3000–2000 BCE) on the main island of Okinawa in the southwestern archipelago of Japan. The skeleton was buried alone in a corner of the cemetery. In this study, morphological and radiographic observations were made on this skeleton, and the pathogenesis of the bone growth disorder observed in the left upper limb was discussed. The maximum diameter of the midshaft of the humerus was 13.8 mm on the left and 21.2 mm on the right. The long bones comprising the left upper extremity lost the structure of the muscle attachments except for the deltoid tubercle of the humerus. The bone morphology of the right upper extremity and the bilateral lower extremities was maintained and was close to the mean value of females from the Ohtomo site in northwestern Kyushu, Japan, during the Yayoi period. It is assumed that the anomalous bone morphology confined to the left upper extremity was secondary to the prolonged loss of function of the muscles attached to left extremity bones. In this case, birth palsy, brachial plexus injury in childhood, and acute grey matter myelitis were diagnosed. It was suggested that this person had survived into young adulthood with severe paralysis of the left upper extremity due to injury or disease at an early age.Keiko Ogami-TakamuraKazunobu SaikiKeita NishiTetsuaki WakebeDaisuke EndoKiyohito MuraiYoshiatsu NaitoToshiyuki TsurumotoHindawi LimitedarticleMedicineRENBioMed Research International, Vol 2021 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R
spellingShingle	Medicine R Keiko Ogami-Takamura Kazunobu Saiki Keita Nishi Tetsuaki Wakebe Daisuke Endo Kiyohito Murai Yoshiatsu Naito Toshiyuki Tsurumoto Significant Asymmetry of the Bilateral Upper Extremities of a Skeleton Excavated from the Mashiki-Azamabaru Site, Okinawa Island, Japan
description	The human skeleton of a young adult male with marked asymmetry of the bilateral upper extremities was excavated from the Mashiki-Azamabaru site (3000–2000 BCE) on the main island of Okinawa in the southwestern archipelago of Japan. The skeleton was buried alone in a corner of the cemetery. In this study, morphological and radiographic observations were made on this skeleton, and the pathogenesis of the bone growth disorder observed in the left upper limb was discussed. The maximum diameter of the midshaft of the humerus was 13.8 mm on the left and 21.2 mm on the right. The long bones comprising the left upper extremity lost the structure of the muscle attachments except for the deltoid tubercle of the humerus. The bone morphology of the right upper extremity and the bilateral lower extremities was maintained and was close to the mean value of females from the Ohtomo site in northwestern Kyushu, Japan, during the Yayoi period. It is assumed that the anomalous bone morphology confined to the left upper extremity was secondary to the prolonged loss of function of the muscles attached to left extremity bones. In this case, birth palsy, brachial plexus injury in childhood, and acute grey matter myelitis were diagnosed. It was suggested that this person had survived into young adulthood with severe paralysis of the left upper extremity due to injury or disease at an early age.
format	article
author	Keiko Ogami-Takamura Kazunobu Saiki Keita Nishi Tetsuaki Wakebe Daisuke Endo Kiyohito Murai Yoshiatsu Naito Toshiyuki Tsurumoto
author_facet	Keiko Ogami-Takamura Kazunobu Saiki Keita Nishi Tetsuaki Wakebe Daisuke Endo Kiyohito Murai Yoshiatsu Naito Toshiyuki Tsurumoto
author_sort	Keiko Ogami-Takamura
title	Significant Asymmetry of the Bilateral Upper Extremities of a Skeleton Excavated from the Mashiki-Azamabaru Site, Okinawa Island, Japan
title_short	Significant Asymmetry of the Bilateral Upper Extremities of a Skeleton Excavated from the Mashiki-Azamabaru Site, Okinawa Island, Japan
title_full	Significant Asymmetry of the Bilateral Upper Extremities of a Skeleton Excavated from the Mashiki-Azamabaru Site, Okinawa Island, Japan
title_fullStr	Significant Asymmetry of the Bilateral Upper Extremities of a Skeleton Excavated from the Mashiki-Azamabaru Site, Okinawa Island, Japan
title_full_unstemmed	Significant Asymmetry of the Bilateral Upper Extremities of a Skeleton Excavated from the Mashiki-Azamabaru Site, Okinawa Island, Japan
title_sort	significant asymmetry of the bilateral upper extremities of a skeleton excavated from the mashiki-azamabaru site, okinawa island, japan
publisher	Hindawi Limited
publishDate	2021
url	https://doaj.org/article/4ef19fafcb7d445cb00422768d0d7a76
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Significant Asymmetry of the Bilateral Upper Extremities of a Skeleton Excavated from the Mashiki-Azamabaru Site, Okinawa Island, Japan

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