Objective: To explore the mechanism of the formation of Infrared Radiant Track along Meridian (IRRTM) course. Methods: The temperature of the skin and subcutaneous deep tissues in 5 points (GV-11

GV-4

GV-5

GV-6 and the point at the thoracic segment 8) along the Governor Vessel and the bilateral control points (non-acupoints

2 cm to the abovementioned 5 points of the Governor Vessel) was measured in 32 volunteers by using temperature transducer and infrared imaging system. At the same time

the image of infrared radiant track over the back of these subjects was recorded. Results: The temperature values at the skin and in the deep tissues along the Governor Vessel were higher than those of the bilateral non-meridian points (P<0.05

0.01)

suggesting a higher energy metabolism rate in the tissues along the meridian which may contribute to the formation of IRRTM. No significant differences were found between the left and right non-meridian points. In 10 subjects

results of infrared imaging showed a higher temperature band along the course of the Governor Vessel (whole course in 7 cases

and more than half course in 3 cases). Conclusion: A higher temperature exists in the tissues along the Governor Meridian course. It suggests that the meridian is possibly a channel for the transformation and transmission of materials

energy and signals in the regulation of functional activities of the human body.