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Prana

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In Hindu philosophy including yoga, Indian medicine, and martial arts, prana (प्राण, prāṇa; the Sanskrit word for "life force" or "vital principle") is all cosmic energy, permeating the Universe on all levels. Prana is often referred to as the "life force" or "life energy". It also includes energies present in inanimate objects. In the literature, prana is sometimes described as originating from the Sun and connecting the elements of the Universe. This life energy has been vividly invoked and described in the ancient Vedas and Upanishads.

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In living beings, this universal energy is considered responsible for all bodily functions through five types of prana, collectively known as the five vāyus. Ayurveda, tantra and Tibetan medicine all describe praṇā vāyu as the basic vāyu from which all the other vāyus arise. Indologist Georg Feuerstein explains "The Chinese call it chi, the Polynesians mana, the Amerindians orenda, and the ancient Germans od. It is an all-pervasive 'organic' energy."

Vāyus

One way of subdividing prana is by the means of vāyus. Vāyu means "wind" or "air" in Sanskrit and the term is used in a variety of contexts in Hindu philosophy. Prāṇa is considered the basic vāyu from which all the other vāyus arise. Hence prāṇā is the collective term which subdivides into the individual vāyus of prāṇa, apāna, uḍāna, samāna, and vyāna. The functions of the five vāyus are as follows:

Nadi

Indian philosophy describes prana flowing in channels called Nadis. The Shiva Samhita states that there is a total of 350,000 nadis in the human body, while other texts says there are 72,000 nadis, each branching off into another 72,000. These nadis play an important role in the application and understanding of certain yoga practices. Shiva Samhita explains that the three most important nadis are the Ida, the Pingala and the Sushumna, each facilitating the flow of praṇā vāyu throughout the body.

Ida nadi relates to the right side of the brain, and the left side of the body, terminating at the left nostril. Pingala nadi relates to the left side of the brain and the right side of the body, terminating at the right nostril. Sushumna nadi connects the base chakra at the base of the spine to the crown chakra at the top of the head.

The practice of pranayama can be used to balance the flow of prana within the body. When praṇā vāyu enters a period of uplifted, intensified activity, the yogic tradition refers to it as pranotthana, a precursor to the Kundalini state.

Pranayama

The word Prāṇāyāma derives from the Sanskrit words prāṇa and ayāma, translating as "life force" and "expansion" respectively. It is a common term for various techniques for accumulating, expanding and working with prana. In yoga, pranayama is a practise of specific and often intricate breathing techniques. Many pranayama techniques are designed to cleanse the energetic channels called nadis allowing for greater movement of prana. Other techniques may be utilized to arrest the breath for samadhi or to bring awareness to specific areas in the practitioner's subtle or physical body. It can also be utilized to generate inner heat as in the practice of tummo. In ayurveda and therapeutic yoga, pranayama may also be utilized for any number of tasks including to affect mood and aid in digestion. A.G. Mohan says the physical goals of pranayama may be to recover from illness or the maintenance of health while its mental goals are: "to remove mental disturbances and make the mind focused for meditation". According to Georg Feuerstein: "the two most important species of the life force are obviously prâna and apâna, which underlie the breathing process. Their incessant activity is seen as the principal cause for the restlessness of the mind, and their stoppage is the main purpose of breath control (prânâyâma)". Swami Yogananda writes that: "The real meaning of Pranayama, according to Patanjali, the founder of Yoga philosophy, is the gradual cessation of breathing, the discontinuance of inhalation and exhalation".

References

Prana Wikipedia