Nadis are energy channels through which flows PRANA – energy, life-force, consciousness. Within the human there is a subtle and perfect network of 72,000 Nadis that distribute this life force throughout the whole body. On the physical level the Nadis correspond to the nervous system, but their influence extends beyond this to the astral and spiritual planes of our existence. If all the Nadis are functioning correctly then we are healthy and generally feel happy. But nearly every one of us has some physical or mental problem, which means that some of the Nadis are not working properly and need to be balanced.
Three Nadis are of special importance - Ida, Pingala and Sushumna
• Ida arises in the left side of the body and represents the moon principle.
• Pingala begins on the right side of the body and symbolizes the sun principle.
• Sushumna runs through the central channel of the spinal cord and represents the consciousness.
On the physical level Pingala has its counterpart in the Sympathetic Nervous System, Ida in the Parasympathetic Nervous System, and Sushumna in the Central Nervous System.
Reference: The Hidden Power in Humans by Paramhans Swami Maheshwarananda
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