2026-03-12T04:40:38Z https://az.repo.nii.ac.jp/oai

oai:az.repo.nii.ac.jp:00005251 2023-06-19T07:39:42Z 17:251:498 17:255:348 17:37:228 31:181:517

アメリカグマ（Ursus americanus），マレーグマ（Helarctos malayanus），ホッキョクグマ（Ursus maritimus）における手内筋の筋重量について Muscle Masses of the Hand in the American Black Bear (Ursus americanus), the Sun Bear (Helarctos malayanus), and the Polar Bear (Ursus maritimus) 大石, 元治 江木, 直子 宇根, 有美 藤田, 道郎 添田, 聡 尼崎, 肇 市原, 伸恒 OISHI, Motoharu EGI, Naoko UNE, Yumi FUJITA, Michio SOETA, Satoshi AMASAKI, Hajime ICHIHARA, Nobutsune American black bear Intrinsic hand muscles Polar bear Sun bear The hands of the American black bear (Ursus americanus), the sun bear (Helarctos malayanus), the polar bear (Ursus maritimus), and the lion (Panthera leo) were dissected and the mass of the intrinsic hand muscles were systematically recorded to explore possible interspecies variation. Muscle mass was divided by the third metacarpal bone size for normalization. The results indicated that the normalized muscle masses of the thenar muscles were larger in the three bears than the lion, and the abductor pollicis muscle was larger in the sun bear than other bears. For the abductor digiti minimi muscle, the normalized muscle mass was larger in the three bears than the lion, but smaller in the polar bear among three bears. One limitation of this study is that here we provided only one specimen for each species, and thus the present results need to be confirmed by examining a larger number of cases in future studies. However, these differences in the intrinsic hand muscles of the four species may reflect adaptation for their different habits. P(論文) 短報 application/pdf SHORT COMMUNICATION 麻布大学 Azabu University 2018-03-31 jpn departmental bulletin paper VoR VoR https://az.repo.nii.ac.jp/records/5251 1346-5880 AA11561468 麻布大学雑誌 Journal of Azabu University 29 1 4 https://az.repo.nii.ac.jp/record/5251/files/bull_jau_vol29-001.pdf application/pdf 835.8 kB 2018-03-26