Immediate Stiffness Changes in Myofascial Trigger Points After Dry Needling

Immediate Stiffness Changes in Upper Trapezius Active Myofascial Trigger Points After Dry Needling in Patients With Neck Pain: A Randomized, Double-Blinded, Placebo-Controlled Trial

Shear-wave elastography (SWE) is considered as a useful tool for quantifying muscle stiffness. Considering that Myofascial Trigger Points (MTrP) are defined as "hyperirritable zones in contracted bands of muscle, thought to be caused by muscle overload or stress" and the effectiveness of dry needling applied to active MTrP for reducing pain and disability, the aim of this study is to assess the effects of sham and real dry needling, applied to active MTrP in the upper trapezius muscle in patients with chronic neck pain, on the muscle stiffness in two areas: 1) the most symptomatic area and 2) a control point.

Inclusion Criteria:

• Patients between 18 and 65 and
• Presence of mechanical neck pain for at least three months duration
• Presence of at least one active MTrP in the Upper Trapezius muscle

Exclusion Criteria:

• Neck pain of traumatic origin (such as whiplash-associated disorder)
• Current use of any kind of analgesic therapy
• Presenting any condition usually considered a perpetuating factor of MTrPs, such as fibromyalgia, hypothyroidism, or iron deficiencies
• Presenting any contraindication for Dry Needling application
• Neuropathies (e.g., radiculopathy)
• Bilateral Pain