Crisco J J, Panjabi M M
Department of Orthopaedics and Rehabilitation, Yale University Medical School, New Haven, Connecticut.
Spine (Phila Pa 1976). 1991 Jul;16(7):793-9. doi: 10.1097/00007632-199107000-00018.
The intersegmental and multisegmental musculature of the lumbar spine was studied in a biomechanical model to compare their lateral stabilizing potential. By approximating the active and passive behavior of the stretch reflex as a variable stiffness spring whose stiffness was proportional to activation, the critical muscle stiffness required for mechanical stability was calculated. The model demonstrated that the intersegmental muscles were the least efficient at laterally stabilizing the spine. At any given load, multisegmental muscles were more efficient, and their efficiency increased with the number of segments spanned. The most efficient muscles were those that originated from the pelvis, spanning the maximum number of segments. The muscular model was unstable, regardless of the muscular stiffness, when any vertebral segment was devoid of muscle. Moreover, when the load on the spine is increased, buckling can be prevented most efficiently with the pelvic muscles and least efficiently with the intersegmental muscles.
在一个生物力学模型中研究了腰椎的节段间和多节段肌肉组织，以比较它们的侧向稳定潜能。通过将牵张反射的主动和被动行为近似为一个可变刚度弹簧，其刚度与激活程度成正比，计算了机械稳定性所需的临界肌肉刚度。该模型表明，节段间肌肉在侧向稳定脊柱方面效率最低。在任何给定负荷下，多节段肌肉效率更高，且其效率随跨越的节段数增加而提高。效率最高的肌肉是那些起自骨盆、跨越节段数最多的肌肉。无论肌肉刚度如何，当任何椎体节段没有肌肉时，肌肉模型都是不稳定的。此外，当脊柱上的负荷增加时，骨盆肌肉预防屈曲最有效，节段间肌肉最无效。
