Pc7 - 大陵穴 Source point. Located in the centre of the crease on the inside of the wrist. This point disperses the Pericardium meridian in its season-summer and boosts it in autumn. In all seasons, it can treat the following disorders: To reduce blood pressure, particularly the systolic value (-). Cramp in the hand (-). Pain in the fingers and the forearm (-). Palpitations (). Agitation (-). Internal nervousness (-).