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In this segment of his YouTube video, Jeff Langmaid summarizes a biomechanics study on cervical spinal fusion. He notes that a single-level fusion does not significantly increase motion at the adjacent spinal segments, distinguishing motion from load. However, as the fusion spans more levels—particularly three-level fusions—the biomechanics of the remaining, unfused cervical spine change markedly. Notably, compensatory motion does not occur only at the immediate neighboring segments but can appear several levels away. Langmaid highlights this as evidence of the spine’s remarkable adaptability.
