Lung Governs Qi and Controls Respiration
Dispersing and Descending (宣發肅降)
Where Traditional Chinese Medicine Meets Modern Physiology
Traditional Chinese Medicine Interpretation
Through breathing, the lungs receive heavenly qi (天氣, air) and combine it with grain qi (水穀之氣, qi derived from food) to form ancestral qi (宗氣, Zong Qi).
This ancestral qi gathers in the chest and supports heart rate and breathing while distributing defensive qi (衛氣, Wei Qi) and nutritive qi (營氣, Ying Qi) throughout the body.
💡 Clinical Significance
When we say “the lung governs qi and controls respiration,” what do students typically focus on first? The concept of “qi” or “respiration”?
Most students tend to concentrate on the unfamiliar and still mysterious concept of “qi.” As a result, they often fail to connect the concept of dispersing and descending (宣發肅降) with the very concrete physical activity of breathing. Instead, they tend to think of it in terms of the seemingly core TCM concept of “qi” – imagining that the lung spreads and descends some kind of “energy.”
❌ “The lung disperses and descends ‘energy'”
However, in clinical practice, understanding respiration is of paramount importance. Dispersing and descending represents ancient physicians’ conceptual framework for breathing.
Modern Understanding of Dispersing and Descending
1
Dispersing (宣發)
▸ Inspiration (breathe in) | Sympathetic nervous activation
Traditional Chinese Medicine meaning:
Lung qi (肺氣) spreads upward and outward, dispersing qi (氣) and body fluids (津液)
Modern physiological correspondence:
- During inspiration → diaphragm descends, negative pressure increases in thoracic cavity
- Sympathetic nervous system activation → heart rate and blood pressure rise, muscle tension increases
- Increased alveolar ventilation → increased oxygen supply → enhanced brain and muscle metabolism
- May be accompanied by thermoregulatory responses due to sympathetic excitation (e.g., pre-sweating stage)
2
Descending (肅降)
▸ Expiration (breathe out) | Parasympathetic nervous activation
Traditional Chinese Medicine meaning:
Lung qi (肺氣) descends downward and converges inward, maintaining internal harmony
Modern physiological correspondence:
- During expiration → diaphragm rises, thoracic pressure increases
- Parasympathetic nervous system activation → heart rate and blood pressure decrease, blood flow redistributes to abdominal organs
- Increased blood flow to spleen and digestive tract mucosa → enhanced digestion and absorption, stabilized breathing
- Creates psychological calm along with relaxation response
⚠️ Important point to remember: Inspiration activates the sympathetic nervous system, while expiration activates the parasympathetic nervous system.
Clinical Application
🫁 Respiratory Disease Treatment
Enhancing dispersing (宣發) function – Dispersing the lung (宣肺)
Promoting sweating, expanding bronchi, and expelling phlegm.
Enhancing descending (肅降) function – Stopping cough and relieving asthma (止咳平喘)
Stopping cough and making breathing comfortable.
🧠 Neuropsychiatric Disease Treatment
Breathing problems are also considered very important in treating neuropsychiatric disorders (panic disorder, depression, insomnia, etc.).
Why is this important?
- Inspiration (inhalation, dispersing 宣發) → stimulates sympathetic nervous system → tenses the body
- Expiration (exhalation, descending 肅降) → stimulates parasympathetic nervous system → relieves tension
📋 Clinical Case: Panic Disorder
In patients with panic disorder, symptoms often improve significantly just by releasing the muscles that assist breathing through acupuncture or cupping and re-teaching proper breathing techniques.
Respiratory-Related Anatomical Structures
Understanding the major anatomical structures involved in breathing is crucial for regulating respiration through acupuncture.
Respiratory Pump (Thoracic pump): Structures that move air
- Diaphragm: Primary muscle of inspiration
- Intercostal muscles: External intercostals (inspiration), internal intercostals (expiration)
- Accessory respiratory muscles: Sternocleidomastoid, scalenes, pectoralis major & minor, abdominal muscles
- Rib cage: Ribs and sternum, encasing the lungs to enable pressure changes
- Pleura: Maintains negative pressure in thoracic cavity, provides lubrication between lungs and chest wall
Summary Table of Acupoints for Respiratory-Related Muscle Areas
| Muscle | Acupoints |
|---|---|
| Diaphragm | CV17 (Danzhong), LR14 (Qimen), GB25 (Jingmen), BL17 (Geshu) |
| Intercostal muscles | ST18 (Rugen), KI22–KI27 (Bulang–Shufu), SP21 (Dabao), LU1 (Zhongfu), LU2 (Yunmen) |
| Sternocleidomastoid | ST9 (Renying), LI18 (Futu) |
| Scalenes | LI17 (Tianding) |
| Pectoralis major & minor | LU1 (Zhongfu), LU2 (Yunmen), ST14 (Kufang) |
| Abdominal muscles Rectus abdominis, obliques, etc. |
CV12 (Zhongwan), CV6 (Qihai), ST25 (Tianshu), SP15 (Daheng) |
This article is based on the knowledge and clinical experience of Dr. Byoungjin Na, Doctor of Traditional Chinese Medicine, with editorial and organizational assistance from ChatGPT and Claude AI.
Dr. Byoungjin Na, Dr.TCM
Director of Greenleaf Acupuncture & Herb Clinic
Healthy Body, Healthy Mind.
