![]() Control subsystem – neural feedback (neural control centers and force transducers located in ligaments, tendons, muscles)Įxcessive displacement of the spinal components would result in neurological deficit, deformity or pain.Active subsystem – spinal muscles (muscles and tendons).Passive subsystem – spinal column (vertebrae, facet joints, intervertebral disc, spinal ligaments and joint capsules).1 describe the stability system as consisting of three conceptually separate but interdependent components: While spinal instability has been defined in various ways, no universally accepted definition currently exists. The objective of this topic is to summarize the current concepts of spinal instability. In addition to protecting the spinal cord and nerve roots, spine stability is necessary to perform the other basic biomechanical function of the spinal system, which is to allow movements between body parts and to carry loads 1. The integration of the biomechanical characteristics of these individual spinal components provides the overall strength and structure of the spine to protect the spinal cord and nerve roots. ![]() The spine is made up of segments consisting of two vertebrae and the interconnecting soft tissues.
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