Immediate Effects of Dry Needing or Manual Pressure Release of Upper Trapezius Trigger Points on Muscle Activity During the Craniocervical Flexion Test in People with Chronic Neck Pain: A Randomized Clinical Trial.

Objective: To compare the effects of dry needling or manual pressure release on an active trigger point in the upper trapezius on craniocervical flexion test performance, pressure pain thresholds, and cervical range of motion in chronic neck pain.
Design: A parallel randomized clinical trial.
Setting: Physical therapy service.
Subjects: Individuals with chronic neck pain.
Methods: Subjects were randomized to receive dry needling (n = 25) or manual trigger point pressure release (n = 25) on upper trapezius active trigger points. Surface electromyography from the upper trapezius, splenius capitis, sternocleidomastoid, and scalene muscles during performance of the craniocervical flexion test was assessed before and immediately after the intervention as the primary outcome. Neck pain intensity, range of motion, and pressure pain thresholds were the secondary outcomes.
Results: A decrease in sternocleidomastoid activity at all stages of the craniocervical flexion test (time effect, P < 0.001) was found in both groups after the interventions, with no significant between-group difference. Pressure pain thresholds measured over the cervical spine and second metacarpal increased after dry needling when compared with manual trigger point pressure release (P < 0.05). Pain intensity decreased immediately after both treatments with moderate to large effect sizes, whereas cervical range of motion increased for both groups but with small effect sizes.
Conclusion: A single session of dry needling or manual pressure release over upper trapezius active trigger points promotes limited effects on muscle performance during the craniocervical flexion test, pressure pain thresholds, and cervical range of motion in patients with chronic neck pain.
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