鱼际穴实体解剖结构OACSTPCD

Objective To explore the anatomical structure of the Yuji acupoint(LU 10).Methods ① Referencing ancient texts regarding the positioning and evolution of the Yuji acupoint.②Employing partition pressure on the thenar area of 25 volunteers to determine the position eliciting an"acupoint sensation",marking these locations accordingly.③ Conducting filiform needle acupuncture on the marked areas to observe acupoint sensations.Preliminary three-dimensional positioning of the acupoint body was determined by referencing cross-sectional anatomical atlases based on the needle's location and depth during sensation.④ Performing microscopic dissection on fresh upper limb specimens from ten individuals to explore the anatomical structure at the acupoint positions identified through surface pressure and acupuncture.⑤ Using ultrasonography to confirm the needle tip position during strong acupoint sensations at the Yuji point during acupuncture sessions.⑥ Identifying the location of Yuji in the hands of ten volunteers using an ultrasound imaging instrument.Acupuncture under ultrasonographic guidance verified the differentiation between acupoint locations and surrounding tissues.Results ①Ancient texts described the Yuji acupoint's location gradually narrowing from scattered vessels on the thenar to a depression beyond the"scaphoid-trapezium groove".②Consistently,partition pressure consistently induced sensations in the distal"scaphoid-trapezium groove".③The most intense acupoint sensations occurred upon needling the distal end of the"scaphoid-trapezium groove".④Microscopic dissection revealed that the muscular branches of the pollicoparpal muscle and their accompanying vessels enter the muscle at the Yuji point.⑤ Strong acupoint sensations correlated with the needle tip positioned at the muscle hilum of the opponens pollicis.⑥Ultrasound imaging confirmed that the muscle hilum of the opponens pollicisasthe solid anatomical structure of the Yujiacupoint.Conclusion The primary acupoint of Yuji is located at the distal end of the"scaphoid-trapezium groove",which is at the hilum of the opponens pollicis.Additionally,multiple other acupoints are dispersed throughout the thenar area,with relatively dense distribution of acupoint bodies in regions rich in superficial skin veins in the middle and proximal thenar area.