Manual Medicine 1986; 2 (2) : 53–58
The nocireaction caused by a somatic joint dysfunction proceeds predominantly via the dorsal ramus of the spinal nerve that supplies the autochthonus back muscles. This is electromyographically demonstrated by continued spontaneous activity in the respective segmental muscle. If the afferent information from the restricted joint is blocked with local anesthetic injection, the spontaneous activity disappears. The same result can be achieved with injection into the corresponding segmental muscle with a delay of 4 min, however. Mobilization techniques, on the contrary, do not have the same spontaneous effect, yet are able to lower spontaneous activity significantly. Manipulation (thrust techniques) results in the immediate disappearance of spontaneous activity.
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