期刊
JOURNAL OF EXPERIMENTAL BIOLOGY
卷 216, 期 15, 页码 2833-2842出版社
COMPANY BIOLOGISTS LTD
DOI: 10.1242/jeb.085118
关键词
intervertebral joints; escape response; kinematics; stiffness; swimming; XROMM
类别
资金
- W. M. Keck Foundation
- National Science Foundation [0552051, 0629372, 0840950]
- Bushnell Research and Education Fund
- Division Of Integrative Organismal Systems
- Direct For Biological Sciences [0629372, 0840950] Funding Source: National Science Foundation
- Div Of Biological Infrastructure
- Direct For Biological Sciences [0552051] Funding Source: National Science Foundation
Whole-body stiffness has a substantial impact on propulsive wave speed during axial undulatory locomotion in fishes. The connective tissues of the vertebral column may contribute to body stiffness, but without mechanical and kinematic analysis it is unclear whether the in vivo range of motion of intervertebral joints (IVJs) is great enough to stress IVJ tissues, thus generating stiffness. The present study used 2D videoradiography and 3D X-ray reconstruction of moving morphology (XROMM) to quantify vertebral kinematics during the startle response in striped bass (Morone saxatilis). X-ray video revealed two distinct patterns of bending: pattern I begins in the abdominal region and then proceeds to maximum IVJ angles in the caudal region, whereas pattern II begins in the cervical region and proceeds to maximum IVJ angles in the abdominal and then the caudal joints. In pattern II bends, the cervical joints exhibit a greater in vivo range of motion than previously reported in other species. XROMM analysis of caudal IVJs suggests primarily lateral bending: mean axial and dorsoventral rotations were less than 2 deg and inconsistent across 51 sequences analyzed from five individuals, whereas mean maximum lateral bending angles were 10.4 +/- 3.57. deg. These angles, combined with previous investigations of mechanical properties, reveal that the maximum angles all occur within the neutral zone of bending, indicating that little stress is experienced about the joint. This suggests that the IVJs of striped bass are quite compliant and likely do not contribute significantly to whole-body stiffness or elastic recoil during swimming in vivo.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据