• Lynn H Gerber, Jay Shah, William Rosenberger, Kathryn Armstrong, Diego Turo, Paul Otto, Juliana Heimur, Nikki Thaker, and Siddhartha Sikdar.
• Center for the Study of Chronic Illness and Disability, George Mason University, CCID, 4400 University Dr, Fairfax, VA 22030.
• PM R. 2015 Jul 1; 7 (7): 711-718.

ObjectiveTo determine whether dry needling of an active myofascial trigger point (MTrP) reduces pain and alters the status of the trigger point to either a non-spontaneously tender nodule or its resolution.DesignA prospective, nonrandomized, controlled, interventional clinical study.SettingUniversity campus.ParticipantsA total of 56 subjects with neck or shoulder girdle pain of more than 3 months duration and active MTrPs were recruited from a campus-wide volunteer sample. Of these, 52 completed the study (23 male and 33 female). Their mean age was 35.8 years.InterventionsThree weekly dry needling treatments of a single active MTrP.Main Outcome MeasuresPrimary OutcomesBaseline and posttreatment evaluations of pain using a verbal analogue scale, the Brief Pain Inventory, and the status of the MTrP as determined by digital palpation. Trigger points were rated as active (spontaneously painful), latent (requiring palpation to reproduce the characteristic pain), or resolved (no palpable nodule).Secondary OutcomesProfile of Mood States, Oswestry Disability Index, and Short Form 36 scores, and cervical range of motion.ResultsPrimary OutcomesA total of 41 subjects had a change in trigger point status from active to latent or resolved, and 11 subjects had no change (P < .001). Reduction in all pain scores was significant (P < .001).Secondary OutcomesSignificant improvement in posttreatment cervical rotational asymmetry in subjects as follows: unilateral/bilateral MTrPs (P = .001 and P = 21, respectively); in pain pressure threshold in subjects with unilateral/bilateral MTrPs, (P = .006 and P = .012, respectively); improvement in the SF-36 mental health and physical functioning subscale scores (P = .019 and P = .03), respectively; and a decrease in the Oswestry Disability Index score (P = .003).ConclusionsDry needling reduces pain and changes MTrP status. Change in trigger point status is associated with a statistically and clinically significant reduction in pain. Reduction of pain is associated with improved mood, function, and level of disability.Copyright © 2015 American Academy of Physical Medicine and Rehabilitation. Published by Elsevier Inc. All rights reserved.

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