基于Micro-CT断层扫描图像的啄木鸟颅骨不同部位显微结构参数研究

Microstructure of Woodpecker's Cranial Bone Based on Micro-computed Tomography

选取大斑啄木鸟、灰头绿啄木鸟、百灵鸟、山雀和戴胜鸟作为样本,其中百灵鸟、山雀和戴胜鸟作为对照,研究啄木鸟颅骨颞部、额部和枕部的显微结构参数.样本经Micro-CT扫描后,在断层扫描图像的基础上,可以得到的显微结构参数包括体积分数、结构模型指数、骨小梁数量、骨小梁厚度、骨小梁分离度和骨质密度.通过与其他鸟类的对比分析发现,啄木鸟具有更加独特的颅骨结构,其骨小梁厚度、体积分数和骨小梁数量显著高于其他鸟类,结构模型指数小于其他鸟类,其颅骨所具有的这种特点是啄木鸟长期进化过程中为适应啄木行为所形成的,也是其抗冲击的重要原因.

The main purpose of this article is to research the microstructure of woodpecker＇s cranial bone on tempus, occiput and forehead. The great spotted woodpecker, the grey-headed woodpecker, the eurasian hoopoe, the titmouse and the lark bird were selected as research samples and the Eurasian hoopoe, the titmouse and the lark bird were chosen as control groups. Microstructure parameters including BV/TV, SMI, Tb.N, Tb.Th, Tb.Sp and BMD were measured based on the micro-computed tomography. After comparison with the control groups, it was found that the Tb.Th, BV/TV and Tb.N were significantly higher and the SMI was lower than that of control groups. These characteristics of woodpecker＇s cranial bone were developed during the evolutionary process in order to adapt to the pecking behaviours and it is an important reason why woodpeckers can resist head impact.