Needling therapy for myofascial pain: recommended technique with multiple rapid needle insertion

Li-Wei Chou, Yueh-Ling Hsieh, Ta-Shen Kuan, Chang-Zern Hong, Li-Wei Chou, Yueh-Ling Hsieh, Ta-Shen Kuan, Chang-Zern Hong

Abstract

Myofascial trigger point (MTrP) is a major cause of muscle pain, characterized with a hyperirritable spot due to accumulation of sensitized nociceptors in skeletal muscle fibers. Many needling therapy techniques for MTrP inactivation exist. Based on prior human and animal studies, multiple insertions can almost completely eliminate the MTrP pain forthwith. It is an attempt to stimulate many sensitive loci (nociceptors) in the MTrP region to induce sharp pain, referred pain or local twitch response. Suggested mechanisms of needling analgesia include effects related to immune, hormonal or nervous system. Compared to slow-acting biochemical effects involving immune or hormonal system, neurological effects can act faster to provide immediate and complete pain relief. Most likely mechanism of multiple needle insertion therapy for MTrP inactivation is to encounter sensitive nociceptors with the high-pressure stimulation of a sharp needle tip to activate a descending pain inhibitory system. This technique is strongly recommended for myofasical pain therapy in order to resume patient's normal life rapidly, thus saving medical and social resources.

Keywords: Acupuncture; Analgesia; Mechanism; Myofascial trigger point; Needling.

Figures

Fig. 1
Fig. 1
Multiple MTrP loci in a myofascial trigger point region.
Fig. 2
Fig. 2
Connection of “myofascail trigger point circuit” (“MTrP circuit”) in the spinal cord.
Fig. 3
Fig. 3
Stimulation of a sensitive locus with needle tip during MTrP injection to elicit pain, referred pain or local twitch response.
Fig. 4
Fig. 4
Spontaneous electrical activity (SEA) including endplate noise (EPN) and endplate spike (EPS) can be frequently recorded in a MTrP region.
Fig. 5
Fig. 5
Contraction knot in the endplate zone of a taut band with shortening of sarcomeres, but relatively elongated sarcomeres outside the endplate zone, to increase tension of the taut band.
Fig. 6
Fig. 6
Simons’ integrated hypothesis of myofascial trigger point.
Fig. 7
Fig. 7
Hong’ rapid multiple needle insertion technique, including careful palpation of MTrP to direct the injection needle (A), and a special way of holding and controlling syringe with the palm firmly contact with patient’s body (B).

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