Expanding our view of the spine system
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This letter does not address specifically any particular article, but rather the larger body of work that exists in the spine literature. There exists a critical barrier for improving our understanding of the spine system, which stems from our characterization of stability and our application of reductionist methods. These limitations highlight the need for a new approach to study the spine.
Clearly for any system, including the spine, to fulfill its intended goal or function requires the system to be stable. For the spine, stable behavior allows it to bear loads, permits controlled movement, while avoiding injury and pain. Although there is some debate whether spine instability occurs in the classic sense, there is no debate that the spine must be stable to function.
It is a well-established theory that systems require feedback control for stability. With feedback control, information about the state of the system is used to generate stabilizing control input. This is...
KeywordsFeedback Control Spine System Inverted Pendulum Trunk Muscle Degenerative Disc Disease