The Three Channels
Among these 72,000 Channels, the three are of special importance.
They are: Sushumna in the center, Ida on the left, and Pingala
on the right.
*Ida (The left Channel)
Ida starts on the left side of the coccyx, goes through the Chakras
on its way and ends on the left side of the Ajna Chakra. This
channel carries the energy of Obscuration. In other words, when
the energy runs smoothly in this channel, one is overcome by Obscuration.
*Pingala (The Right Channel)
Similarly, Pingala starts on the right side of the coccyx, goes
through the Chakras and ends on the right side of Ajna Chakra.
It carries the energy of Malevolence. In other words, when this
channel is clear, one becomes hot and malevolent.
*Sushumna (The Central Channel)
Sushumna, or the central channel, carries the energy of Attachment,
which includes the attachment to sex, attachment to food, and
so forth. These stress energies are sublimed as Kundalini and
go up this channel. If Sushumna is clogged, there is no ascent
of Kundalini, hence one has a lot of attachments. The only way
to get rid of these attachments is to purify the central channel.
From Tathagata Abhidhamma Book 1