LOW BACK PAIN IN CYCLIC AND PROLONGED ACTIVITIES

脊柱韧带在引起脊柱不稳、损伤和低 将调查两种类型的职业活动中的背痛。 是 假设脊柱韧带中的机械感受器，当由于 在脊柱旁肌肉中启动持续的反射活动。 作为 随着时间的推移，感受器变得不敏感， 反射性肌肉活动丧失，使脊柱暴露于 不稳定，受伤和腰痛。 因此，这项研究可以提供 对广泛的腰痛类型的见解，从特发性 由于韧带拉伤引起的疼痛， 损伤、椎间盘突出和由于缺乏肌肉组织支撑而导致的神经损伤。 一个为期三年的实验研究计划，包括猫模型， 系统地探讨电生理和 在体脊柱韧带的力学性能和运动活性 在循环和静止负荷下的椎旁肌和腹肌单位 条件下，当韧带受到蠕变以及他们的 恢复模式与休息。 这项研究的结果将提供强有力的洞察力， 常见职业活动中腰痛的神经生理学;提供 洞察力的原因失去肌肉力量和协调和延长 下背痛;并描述职业条件，导致低 背部疼痛和其他可能阻止它的职业条件。

The role of spinal ligaments in causing spinal instability, injury and low back pain in two types of occupational activities will be investigated. It is hypothesized that mechano-receptors in the spinal ligaments, when deformed due to loading, initiate sustained reflex activity in the paraspinal muscles. As creep sets in the ligaments, over time, the receptors are desensitized and the reflexive muscular activity is lost, rendering the spine exposed to instability, injury and low back pain. This research, therefore, may provide an insight for a wide range of low back pain types, ranging from idiopathic pain due to ligament strain, to that resulting from the chain reaction of injury, disc herniation and nerve damage due to lack of musculature support. A three year experimental research program consisting of the feline model will systematically explore the relationship between the electrophysiological and mechanical properties of spinal ligaments in vivo and the activity of motor units of the paraspinal and abdominal muscles in cyclic and stationary loading conditions, when the ligaments are subjected to creep as well as their recovery pattern with rest. The results of this research will provide strong insight into the neurophysiology of low back pain in common occupational activities; provide an insight to the cause of lost muscle strength and coordination and prolongation of low back pain; and delineate occupational conditions that result in low back pain and other occupational conditions that may prevent it.