In TCM, qi is considering as the fundamental substance of the human body, and its movements explain various life processes.
Vital energy Qi
Qi in its physiological sense constitutes, replenishes, and nourishes the human body. Qi is often mentioning as vital energy, because it has believed to be the motive energy derived from the essential substance for different vital processes.
Classification of Qi
Qi is classifying according to what it motivates. For example,
- Heart-qi refers to the motive force with which the heart works and the blood circulates, so it regulates the cardiac function;
- Stomach-qi refers to the motive force with which the stomach functions, so it regulates the gastric function.
- Zheng-qi refers to the motive force with which the defense functions, so it generates resistance against diseases.
- Yang-qi refers to the motive force, with which the body warmth is maintaining, that is it maintaining normal body temperature.
Formation and function of Qi
Qi is a form from the inhaled oxygen, the dietary nutrients, and the inborn primordial qi stored in the kidney, which is genetically transforming from their parents. Qi circulates along meridians and collaterals. A healthy individual requires normal circulations of qi; any stagnation or restriction of this circulation develops health problems. The circulation of qi is disturbing or stagnating by mental or emotional condition. For example, anger may lead to dizziness, headache, or distention of the stomach with impaired appetite. On the other hand, the exercise of mind such as qigong can support the circulation of qi.