Kundalini is the name of a sleeping dormant potential force in the human organism and it is situated at the root of the spinal column. In the masculine body, Kundalini is in the perineum, between the urinary and excretory organs. In the female body, its location is at the root of the uterus, in the cervix. This center is known as moola dharna chakra and it is actually a physical structure. It is a small gland which you can even take out and press.
However, kundalini is a dormant energy, and even if you press it, it will not explode like a bomb. To awaken kundalini you must prepare yourself through yogic techniques. You must practice asanas, pranayama, kriya yoga and meditation. Then, when you are able to force your prana into the seat of kundalini, the energy wakes up and makes its way through Sushumna Nadi, the central nervous canal, to the brain.
As kundalini ascends, it passes through each of the chakras which are interconnected with the different silent areas of the brain. With the awakening of kundalini, there is an explosion in the brain as the dormant or sleeping areas start blossoming like flowers. Therefore, kundalini can be equated with the awakening of the silent areas of the brain.
Although kundalini is said to reside in moola dharna chakra, we are all at different stages of evolution, and in some of us kundalini may have already reached swadhisthana, Manipura or Anahata chakra. If this is so, whatever sadhana you do now might start an awakening in Anahata or some other chakra.
However, an awakening of kundalini in moola dharna chakra is one thing, and awakening in Sahasrara, the highest center of the brain, is another. Once the multipetalled lotus of Sahasrara blossoms, a new consciousness dawns. Our present consciousness is not independent, as the mind depends on the information supplied by the senses. If you have no eyes, you can never see; if you are deaf, you will never hear. However, when the superconsciousness emerges, the experience becomes completely independent and knowledge also becomes completely independent.
Kundalini is the creative energy. it is the energy of self-expression. It is the same energy that is expressed when someone composes or plays beautiful music. It is the same energy which is expressed in all parts of life, whether it is building up a business, fulfilling the family duties or reaching whatever goal you aspire for. These are all expressions of the same creative energy.
When you throw a pebble into a still lake, it produces circular ripples. In the same way, when you repeat a mantra over and over again, the sound force gathers momentum and creates vibrations in the ocean of the mind. When you repeat the mantra millions and billions of times, it permeates every part of your brain and purifies your whole physical, mental and emotional body.
Awakening through sound or music - nada yoga.
Here the sounds are the bija mantras and the music consists of particular melodies corresponding to particular chakras. This is a most tender and absorbing way of awakening.
3. Raja Yoga
It occurs by a sequential process of concentration, meditation and communion, the experience of union with the absolute or supreme.
4. Kriya Yoga
This is the noble way of awakening the kundalini which is done through specific actions which can be learned by a potential guru.
There is a mantra which has the power to awaken the kundalini. The mantra is provided by Gurudev Dr. Narayan Dutt Shrimali and is a very effective mantra. The mantra is practiced by many sadhakas to awaken the kundalini.