The objectives of this study are: 1)To investigate the difference in pain modulatory mechanisms using quantitative sensory testing (QST) between healthy controls and patients with radicular leg pain due to nerve root compression. 2) To investigate the association between changes in radiating leg pain and pain modulation among the patient group.
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Cuff sensitivity, measured with computer-controlled cuff algometry
Timeframe: At baseline and at discharge from treatment throughout study completion, an average of 6 months. The timeframe between the baseline test and follow up test for controls will be matched the patient group.
Temporal summation of pain (increase in pain during repeated pain stimuli at same intensity) measured with computer-controlled cuff algometry
Timeframe: At baseline and at discharge from treatment throughout study completion, an average of 6 months. The timeframe between the baseline test and follow up test for controls will be matched the patient group.
Conditioned pain modulation (change in pain sensitivity during a competing pain stimulus) measured with computer-controlled cuff algometry
Timeframe: At baseline and at discharge from treatment throughout study completion, an average of 6 months. The timeframe between the baseline test and follow up test for controls will be matched the patient group.