Ajna chakra is the second most important chakra and it is situated in the forehead between the two eyebrows.
Anahata chakra is the heart chakra, so it corresponds to the cardiac plexus in the physical body and situated in the center of the chest.
Svadhisthana is second level chakra located just above the Muladhara chakra at the root of the abdomen.
Muladhara chakra is termed as the adhara chakra, which means support for all other chakras. It is situated at the base of the spine near to the genital organ.
There are seven major kundalini chakras and energy centers in man that are neither present in the physical body nor detected any direct means.
This article explains how padmasana posture is the best for meditation and how it enhances the energy in the aspirant.
The kundalini energy can only be experienced for those who have awakened it in an ordinary manner.
Kundalini meditation deals not only with the human mind but also include other aspects as mentioned in ancient yoga texts.