Low back pain

Clinically, I see individuals with low back pain who get better with our treatment, but some do return to our care due to a reoccurrence of symptoms.  I often get the question: Why does this happen? Is it a muscular imbalance? Is it an altered pain perception? Is it a combination? What is predisposing these individuals for low back pain and keeping them coming back into my office?

Low back pain, disc herniation, Bloomington, Normal, Illinois

MacDonald et al attempted to answer these questions by  identifying  why certain patients have a higher reoccurrence rate of low back pain.

They did this by investigating whether neuromuscular control of the short and long fibers of the deep back muscles differs in patients who have a history of unilateral low back pain, who currently are asymptomatic, versus  healthy counterparts.

They did this by looking at the EMG activity of the short and long fibers of the multifidus muscle and shoulder musculature and compared the two groups and found:

  • EMG onset of the short fibers of the deep back musculature relative to the deltoid (in the shoulder) occurred later in people with recurrent LBP than in their healthy subjects.
  • This delay was higher on the previously painful side of the low back as compared to the non-painful side.
  • The timing of muscle activation (short fibers active before long fibers) was observed in both healthy individuals and on the non-painful side in the pain group, but absent on the previously painful side.  The alteration in timing may reflect changes in motor planning which could be due to inaccurate or ignored sensory information from the spine OR a change in strategy by the central nervous system. This actually may be a way of attempting to avoid pain provocation.
  • Impaired control of these muscles likely will compromise spinal control and likely makes the spine more vulnerable for recurrent episodes of pain.

MacDonald D, Moseley GL, Hodges PW. Why do some patients keep hurting their back? Evidence of ongoing back muscle dysfunction during remission from recurrent back pain. Pain 2009; 142: 183-188.

Please hover your mouse over the low back pain menu bar and then click on the low back exercise video page that will be best suited for your pain pattern or area to be treated.

 

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