Abdul Saad, Wan Aliff (2021) Human Spine Kinematics for Applications in Multiple-Joint Spinal Orthosis. Doctoral thesis, Universiti Teknologi Malaysia.
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Abstract
Low back pain (LBP) treatments necessitate a full understanding of spinal kinematics since the spine is made up of many segments. However, there is still a limited study that focuses on the active and passive spinal segments during critical daily activities. Even data profile on the spinal multi-segment contribution to spinal kinematics has not yet been established. Currently, there is no intelligent multiple-joint spinal orthosis that emphasizes segmental biomechanics of, and provides assistive support to the spine. Most of the literature studies only focused on up to three joints or segments mechanism. The main objective of this research was to analyze the postural movement of spinal motion in critical daily activities. This study also focused on the active-passive spinal segments of the thoracic and lumbar, as well as their contributions to spinal motions. This study was divided into three phases, with the first focusing on a fundamental study of critical daily activity, the second on product design development and control system of the proposed multi-joint spinal orthosis, and the last on the integration of the control system, prototype, and data profile. The interclass correlation coefficient (ICC) analysis showed that all tasks investigated had excellent reliability, with values ranging from 0.94 to 0.99. In both the Begin and Return cycles, two-way analysis of variance (ANOVA) demonstrated significant differences in findings for interaction between spinal segments and different approaches within thoracic segments (P-value<0.05). The interaction within the lumbar region was found for Weightlift 5kg load during the Begin cycle and in both cycles during the Pick Object task. For both weights lifted, it was discovered that the Stoop approach produced a peak of angular displacement that was about 4 times greater than the Squat. A motion capture device was used to obtain the data profile for the active-passive spinal segment. The active-passive range was chosen based on electromyography activation data from similar studies in the literature. A prototype of the multi-joint spinal orthosis was developed together with the initial integrated mechatronic system. This study has successfully contributed to a data profile of active-passive spinal segments, which is critical in comprehending complex spinal kinematics.
| Item Type: | Thesis (Doctoral) |
|---|---|
| Subjects: | Technology > Mechanical engineering and machinery |
| Depositing User: | ENCIK SAIFUL FADZLY JAMALUDIN |
| Date Deposited: | 22 Jun 2026 16:42 |
| Last Modified: | 22 Jun 2026 16:42 |
| URI: | https://repositori.mohe.gov.my/id/eprint/286 |
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