Comparative anatomy of the radial sesamoid bone in the polar bear (Ursus maritimus), the brown bear (Ursus arctos) and the giant panda (Ailuropoda melanoleuca)

被引:11
作者
Endo, H
Makita, T
Sasaki, M
Arishima, K
Yamamoto, M
Hayashi, Y
机构
[1] Natl Sci Museum, Dept Zool, Shinjuku Ku, Tokyo 1690073, Japan
[2] Yamaguchi Univ, Fac Agr, Dept Vet Anat, Yamaguchi 7538515, Japan
[3] Univ Tokyo, Univ Museum, Bunkyo Ku, Tokyo 1130033, Japan
[4] Azabu Univ, Sch Vet Med, Dept Vet Anat 2, Kanagawa 2298501, Japan
[5] Univ Tokyo, Grad Sch Agr & Life Sci, Dept Vet Anat, Bunkyo Ku, Tokyo 1138657, Japan
关键词
brown bear; giant panda; polar bear; radial sesamoid bone;
D O I
10.1292/jvms.61.903
中图分类号
S85 [动物医学(兽医学)];
学科分类号
0906 ;
摘要
Since we have clarified the manipulation mechanism using the radial sesamoid (RS) in the giant panda (Ailuropoda melanoleuca), our aim in this study is to examine the position, shape and function of the RS morphologically, and to observe the attachment to the RS of the M. abductor pollicis longus and the M. opponens pollicis in the other Ursidae species. So, we focused on the carpus and manus of the polar bear (Ursus maritimus) and the brown bear (Ursus arctos) in this study. The RS was tightly articulated to the radial carpal, and could not adduct-abduct independently of the radial carpal. The M. abductor pollicis longus tendon and the M. opponens pollicis belly were attached to the RS, independently. In the polar bear, the deep concave and the flat surface were confirmed in attachment area for these two muscles. The morphological relationship between the RS and the M. abductor pollicis longus and the M. opponens pollicis in the two species of bears were essentially consistent with that in the giant panda. It also demonstrated that the manipulation mechanism of the giant panda has been completely based on the functional relationship between the small RS, and the M. abductor pollicis longus and the M. opponens pollicis in Ursidae species. sesamoid bone.
引用
收藏
页码:903 / 907
页数:5
相关论文
共 12 条
[1]  
[Anonymous], FIELDIANA ZOOLOGY ME
[2]  
*BEIJ U BEIJ AGR U, 1986, MORPH GIANT PAND SYS, P148
[3]  
Corbet GB, 1991, WORLD LIST MAMMALIAN
[4]  
Endo H, 1996, J ANAT, V189, P587
[5]   Role of the giant panda's 'pseudo-thumb' [J].
Endo, H ;
Yamagiwa, D ;
Hayashi, Y ;
Koie, H ;
Yamaya, Y ;
Kimura, J .
NATURE, 1999, 397 (6717) :309-310
[6]  
Lankester ER, 1901, T LINN SOC LOND, V8, P163
[7]  
Makita Takashi, 1998, Japanese Journal of Zoo and Wildlife Medicine, V3, P79
[8]   The prehensile paw of the giant panda [J].
Pocock, RI .
NATURE, 1939, 143 :206-206
[9]   A phylogeny of the bears (Ursidae) inferred from complete sequences of three mitochondrial genes [J].
Talbot, SL ;
Shields, GF .
MOLECULAR PHYLOGENETICS AND EVOLUTION, 1996, 5 (03) :567-575
[10]  
WALKER EP, 1983, WALKERS MAMMALS WORL, V2, P964