[The relationship between experimental changes in the stress-strain distribution and the tissues structural...

Using 45 rabbits, the authors made a research on the relationship between the experimental change of the stress-strain distribution and the tissues structural abnormalities of the cervical column. After having changed the stress and strain distribution on the rabbits' cervical vertebrae by letting them bow their heads, we measured the strain distribution in Vivo with resistant strain gauges, inspected the pathological changes of the cervical vertebrae, the nuchal ligaments, the capsular ligaments, the neck muscles and the attachments of the capsular ligament to bones, by ligh microscope and electron microscope. We found that the greater the level of the strain and the longer time the strain was loaded, the more evident the morphological abnormalities of the cervical vertebrae. The increase of the stress and strain could also cause degeneration of the nuchal ligaments, capsular ligaments and neck muscles. We believe that the abnormalities of the of the soft tissues around the cervical vertebral bones play an important part in the development of the cervical spondylosis. We think that the morphological changes of the cervical column is the basis of the biomechanical pathogenesis of the cervical spondylosis.