What primarily determines the presence of spinal fixation?

The presence of spinal fixation is primarily determined by hypo mobility. In chiropractic theory, spinal fixation refers to a restricted range of motion in a spinal joint or segment, which is often the result of hypo mobility. This phenomenon means that the affected joint does not move through its full range due to various factors like inflammation, joint degeneration, or muscle imbalances that limit movement.

When hypo mobility occurs, the surrounding soft tissues, including ligaments and muscles, may tighten or become dysfunctional, leading to compensatory changes in nearby joints. This situation not only creates mechanical stress but can also contribute to discomfort and dysfunction throughout the kinetic chain.

Joint hypermobility, muscle weakness, and nerve damage can also influence spinal mechanics but are not the primary determinants of spinal fixation. Hypermobile joints may actually experience excessive movement rather than fixation. Muscle weakness can contribute to stabilization issues but is not itself the defining factor of hypo mobility. Likewise, while nerve damage can affect muscle control and function, it does not directly define spinal fixation as hypo mobility does.