Neurophysiological Effects of Dry Needling in Patients With Neck Pain

The present study aims to evaluate the differences that may be experienced in pain and cervical disability, before, during and just after the intervention of the Deep Dry Needling in the upper trapezius muscle in active, passive myofascial trigger points (MTP) or non-MTP in Patients with neck pain, assessing, in turn, the neurophysiological effects on the Autonomic Nervous System.

Hypothesis: Deep Dry Needling of active myofascial trigger points produces a greater decrease of pain and cervical disability index and increase of pressure pain threshold; Than the Deep Dry Needling of Myofascial Trigger Points latent or out of Myofascial Trigger Points in patients with chronic neck pain.

Objective: To determine the efficacy of Deep Dry Needling applied on Active Myofascial Triggers (MTP) vs. latent MTP versus MTP, on pain reduction and cervical disability, in patients with chronic neck pain attributable to Myofascial Pain Syndrome.