The morphological examinations of triggerpoints goes back to 1904 (Stockman). But most known are the researches of Travell&Simons (1976, 1983) who also stated the correlation of a variety of triggerpoints with muscular acupuncture points. Heine (1987) could prove the corresponding of many acupuncture points with nerve-vessel bundles which pierces the superficial body fasciae. A similar anatomical situation can be assumed also for the deep muscular triggerpoints and acupuncture points.

Method: The points TH 15 (Tianliao) and St 36 (Zusanli) were examined with a digitally encoded ultrasound system with a 12 MHz linear array transducer with a colour flow resolution down to 0,6 mm. After exact needling (De Qi) the depth of the point was measured with the length of the inserted needle and the transducer placed exactly upon the points.