The fourth cervical vertebra (C4) controls upward shoulder motion and is one of the nerves that controls your diaphragm (the muscle at the bottom of your rib cage that helps you breathe).
• Meridians: spleen meridian (yin), stomach meridian (yang)
• Connections: eye, sinuses, nasal and palette Glands, nose, sublingual glands, sub maxillary Glands, ears, mouth, mandibular Joint, lips, eustachian tube, throat
• Possible problems: constant cold, loss of hearing, chapped lips, hay fever/Rose fever, catarrh, cramped lip muscles, adenoids, catarrh
