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There are various ancient Hindu practices and philosophies which today have been proven by modern science. Such as:
Can you name any others?
Yogi's are known to observe their own body with utmost attention and were able to find out things about the body which modern medicine and science also found out.
One such thing is nasal cycle.
The nasal cycle was studied and discussed in the ancient Indian yoga of literature of pranayama. In the modern western literature, it was first described by the German physician Richard Kayser in 1895.
A CT scan showing evidence of the nasal cycle. The more patent airway is on the right of the image; the swollen turbinates congesting the left.
The nasal cycle is the unconscious alternating partial congestion and decongestion of the nasal cavities in humans and other animals. This results in greater airflow through one nostril with periodic alternation between the nostrils. It is a physiological congestion of the nasal conchae, also called the nasal turbinates (curled bony projections within the nasal cavities), due to selective activation of one half of the autonomic nervous system by the hypothalamus. It should not be confused with pathological nasal congestion.
Also notice the similarity of this with Anulom Vilom Pranayama.
