The Taittiriya Upanishad describes the human being as constituted of five sheaths — the physical body, the vital body, the mental body, the intelligence body, and the bliss body. The vital body — Pranamaya Kosha — is the one animated by the five Pranas.
These five are not metaphysical abstractions. They correspond to recognisable physiological functions — and understanding them explains experiences that the conventional biomedical model describes but does not account for.
Prana Vayu — the inward-moving force. Located in the chest and heart region. Governs the intake of energy — breathing, ingestion, the reception of experience. When Prana Vayu is disturbed: respiratory conditions, anxiety, the feeling of not being able to take in what is being offered. The practitioner whose Prana Vayu is strong has a quality of genuine receptivity — they can actually hear what is being said rather than preparing their response.
Apana Vayu — the downward and outward-moving force. Located in the lower abdomen and pelvis. Governs elimination — excretion, reproduction, the release of what has been processed. When Apana is disturbed: constipation, reproductive difficulties, the psychological inability to let go of what is finished. The practitioner whose Apana is clear has a quality of completion — they finish what they start and release what they have finished.
Samana Vayu — the equalising and integrating force. Located at the navel. Governs digestion — the assimilation and distribution of what has been received. When Samana is disturbed: digestive disorders, the inability to integrate new information or experience. The practitioner with strong Samana is the one who actually learns from experience rather than merely accumulating it.
Udana Vayu — the upward-moving force. Located in the throat. Governs expression — speech, the upward movement of consciousness in meditation, the process of dying. When Udana is clear: speech is precise and effective, meditative states deepen naturally, the practitioner has a quality of genuine upward momentum in their development. Disturbed Udana: thyroid issues, speech difficulties, the feeling of being stuck at a particular level of understanding.
Vyana Vayu — the pervasive, integrating force. Distributed throughout the entire body. Governs circulation and coordination — the distribution of nourishment to every part, the integration of the whole system. When Vyana is strong: the body feels unified, energy is evenly distributed, there is no sense of parts fighting each other. When disturbed: circulatory problems, the sense of fragmentation, different parts of the self pulling in different directions.
Abhinavagupta's Tantraloka treats the five Pranas not merely as physiological functions but as five modes of Shiva's own Consciousness operating within the body of the practitioner. Each Vayu is both a biological reality and a manifestation of divine intelligence — which means each disturbance is both a physiological condition and a message about the quality of the practitioner's relationship to that mode of consciousness. The body and the spirit are not separate systems to be addressed separately. They are one system expressing itself at different levels of subtlety.
The therapeutic implication: every significant physical symptom has a corresponding Prana-level dysfunction. And every Prana-level dysfunction has a corresponding practice that addresses it at the right level of the system.
This is not alternative medicine in the sense of replacing biomedical intervention. It is a more complete map — one that includes the biomedical level and extends the analysis into the domain of the organising intelligence behind the physiology.