Gunn Intramuscular Stimulation (Gunn IMS or IMS) is a full assessment and treatment approach for myofascial pain syndromes that are of neuropathic origin (nerve generated).

IMS assessment and treatment requires a thorough physical examination by a credentialed physician or physiotherapist trained to recognize the physical signs of neuropathic pain. This physical examination is essential, as neuropathic pain is not visible on X-Rays, MRI, bone and CT scans.

IMS treatment uses sterile acupuncture needles to target muscles that are shortened as a result of neuropathic pain. Intramuscular Stimulation treatment involves dry needling the affected areas of the body. The point of insertion of the acupuncture needle can be at the epicenter of taut, tender muscle bands, or it can be in the muscles near the spine where the nerve root may have become irritated and supersensitive.

Intramuscular Stimulation needling into a shortened, supersensitive muscle will generally cause an ache or a muscle twitch.

The dry needling causes 3 things to happen in the muscle:

1. A stretch receptor in the muscle is stimulated, producing a reflex relaxation (lengthening).
2. The needle also causes a small injury that draws blood to the area, initiating the natural healing process.
3. The treatment creates an electrical potential in the muscle to help the nerve function normally again.