The Science of the Yoga

If we observe any form of Lord Vishnu lying on a serpent (for eg. Lord Ranganatha in Srirangam or Lord Vishnu in the Ocean of Milk), the serpent has three and a half coils. What is its significance?
In Raja Yoga, it is said that the ‘Sushumna’ nerve in our body is the one through which the serpent power called Kundalini rises. Through proper practice, this serpent power can be risen. This ‘Sushumna’ nerve lies in our body as three and a half coils.
The Kamakshi Temple in Kanchipuram has 3 Prakaras and the innermost prakara terminating half-way at ‘Aroopa Kamakshi’. That makes it three-and a half prakaras, again signifying the same fact.
When the Kundalini rises, it passes through seven Chakras – Muladhara, Svadishtana, Manipura, Anahata, Vishuddha, Ajnachakra a nd Sahasrara.
The Srirangam temple has seven prakaras to denote the the seven chakras.
The Seven Hills of Tirupati signify this fact.