December 2025

1. Introduction: The Enigma of the “Arrival of Qi” The practice of acupuncture, a cornerstone of Traditional Chinese Medicine (TCM), rests on a fundamental yet elusive physiological phenomenon: the sensation of De Qi. Historically described in classical texts such as the Biao You Fu as the “arrival of vital energy,” De Qi is not merely… Continue reading The Somatic Gateway: De Qi, Theta Oscillations, and the Hypnagogic Threshold