When muscle function is impaired from too much or too little nerve supply, muscles that support the spine respond in different ways. Myopathology Abnormal muscle function When nerve impulses are diminished, muscles supporting the spine can weaken, waste away or atrophy. When muscles are overstimulated from nerve irritation, supporting muscles an become tight and go into spasm. In either extreme, fibrotic scar tissue can form in these muscles, changing their elasticity. This damage to the suppporting muscles of the spine is why repeated adjustments are often necessary and adjustments don't seem to "hold." It also explains why long-standing spinal problems are so difficult and time-consuming to correct. Without proper rehabilitation, many patients experience a relapse of their original health complaint. The fourth step in the vertabral subluxation complex... Histopathology Pathophysiology Suggestions to follow during spinal correction.