Illustration from an edition of the Wanli reign period of the Ming dynasty (1573-1620). The image charts the disorders associated with the three pulse sectors of the right wrist - cunkou, guanzhong and chixia; i.e. the cunkou pulse of the right wrist is associated with the lung and large intestine, the guanzhong pulse of the right wrist is associated with the spleen and stomach, and the chixia pulse of the right wrist is associated with the mingmen (right kidney considered as 'Portal of Life') and sanjiao (Triple Burner). One fen (c. 0.3 cm) from the wrist joint is the location for palpating the qikou (Qi Aperture) pulse.
