在股前侧,股直肌近端、缝匠肌与阔筋膜张肌3条肌肉之间凹陷中。
注1:晓足,稍届膝,大腿稍外展外旋,绷紧肌肉,在股直肌近端显现出2条相交叉的肌肉(斜向内侧为缝匠肌,外侧为阔筋膜张肌),3条肌肉间围成1个三角形凹陷,其三角形尖下深陷处即为本穴。
注2:髂前上棘、髌底外侧端连线与耻骨联合下缘水平线的交点处。
On the anterior aspect of the thigh, in the depression among three muscles: the proximal portion of the rectus femoris muscle, the sartorius muscle and the tensor fasciae latae muscle.
Note 1: With the hip and the knee in slight flexion, and the thigh slightly abducted when resistance is placed against the anteromedial aspect of the thigh, a triangular depression appears. The proximal portion of the rectus femoris muscle is found in the depression between the sartorius muscle medially and the tensor fasciac latae muscle laterally. ST31 is located at the deepest point in the depression inferior to the apex of this triangle.
Note 2: ST31 is located at the intersection of the line connecting the lateral end of the base of the patella with the anterior superior iliac spine, and the horizontal line of the inferior border of the pubic symphysis.

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