Endo H, Sasaki M, Hayashi Y, Koie H, Yamaya Y, Kimura J
Department of Zoology, National Science Museum, Tokyo, Japan.
J Anat. 2001 Feb;198(Pt 2):243-6. doi: 10.1046/j.1469-7580.2001.19820243.x.
The movement of the carpal bones in gripping was clarified in the giant panda (Ailuropoda melanoleuca) by means of macroscopic anatomy, computed tomography (CT) and related 3-dimensional (3-D) volume rendering techniques. In the gripping action, 3-D CT images demonstrated that the radial and 4th carpal bones largely rotate or flex to the radial and ulnar sides respectively. This indicates that these carpal bones on both sides enable the panda to flex the palm from the forearm and to grasp objects by the manipulation mechanism that includes the radial sesamoid. In the macroscopic observations, we found that the smooth articulation surfaces are enlarged between the radial carpal and the radius on the radial side, and between the 4th and ulnar carpals on the ulnar side. The panda skilfully grasps using a double pincer-like apparatus with the huge radial sesamoid and accessory carpal.
通过大体解剖、计算机断层扫描（CT）及相关三维（3-D）容积再现技术，阐明了大熊猫（Ailuropoda melanoleuca）抓握时腕骨的运动情况。在抓握动作中，三维CT图像显示，桡侧腕骨和第4腕骨分别主要向桡侧和尺侧旋转或弯曲。这表明两侧的这些腕骨使大熊猫能够从前臂弯曲手掌，并通过包括桡侧籽骨在内的操纵机制抓取物体。在大体观察中，我们发现桡侧腕骨与桡骨之间以及尺侧第4腕骨与尺骨之间的光滑关节面增大。大熊猫利用巨大的桡侧籽骨和副腕骨组成的双钳状结构巧妙地抓握物体。
