The effect of lifting load on the kinematic characteristics of lumbar spinous process in vivo

• DOI: 10.1007/s00276-023-03135-6
• Publication Date: 2023-04-03T10:23:20Z
• Authors: Huanxiong Chen; Zhenhao Zhong; Wangqiang Wen; Haoxiang Xu; Guojun Li; Tian Su; Zepei Zhang; Jun Miao
• Keywords: Supine position; Spinous process; Erector spinae muscles

There are limited data on the in vivo natural kinematics of lumbar spinous process. This paper intends to explore effect lifting load movement mode process and its biomechanical changes.Ten asymptomatic subjects between ages 25 39 underwent CT scans spine supine position, 3D models L3-L5 were constructed. Using a Dual Fluoroscopy Imaging System (DFIS), instantaneous orthogonal fluoroscopic images each subject's flexion-extension, left-right bending, rotational movements taken under different loads (0 kg, 5 10 kg). The model was matched, using computer software, bony contours from two views, so that vertebral position at location could be quantified. A Cartesian coordinate system ultimately constructed tip obtain 6DOF kinematic process.In postural trunk, there no significant difference rotation angle translation range (P > 0.05). In flexion extension motion, processes mainly rotate < 4° along medial lateral axes translate 4 mm craniocaudal direction. bending 5° anterior posterior axes, is coupling 2 mm. coupled less than 3°, distance measured 6.66 ± 2.29 L3/4 5.08 1.57 L4/5.The will not change significantly with increasing low load. complex dominated by motion.