Percutaneous Application of Galvanic Current in Rodents Reverses Signs of Myofascial Trigger Points

Figure 2

Determination of speed of the local twitch response. The local twitch response (LTR) can be seen by ultrasound technique as a very discreet area (gray ellipse; see supplementary videos). This area is called the “LTR area.” After determining the LTR area, the distance from the point at the beginning of the LTR and the tibia (X1) and the distance from the point at the end of the LTR and the tibia (X2) were measured. In all cases, three measurements were made. X1-X2 = distance traveled by the LTR during the spasm. The total LTR duration was extracted from the video analyzers. These parameters were used to calculate the speed () of LTR: = (X1−X2)/LTR duration.

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