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 循行：(1)起于小腹内，下出于会阴部，（2)向后行于脊柱的内部，（3)上达项后风府，进入脑内，（4)上行巅顶，（5)沿前额下行至鼻柱。
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The Course of the Vessel: It arises from the lower abdomen and comes out from the perineum. It runs posteriorly along the interior side of the spinal column to Fengfu(GV16) at the nape where it enters the brain. It further ascends to the vertex and goes down along the forehead to the nasal column.
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