Considered to be storage vessels or reservoirs of energy and are not associated directly with the internal organs. The Conception & Governing Vessels both have unique meridian points, whereas the other 6 vessels share meridian points from the other major meridians. The Extraordinary Channels, also known as the Psychic Channels because they can be controlled through the Mind (Intention and Will), are the primary site of focus during Taoist Meditation, Neigong (yoga, internal exercises) and Qigong (external exercises). The Eight Extraordinary Vessels are: Conception Vessel (Ren Mai); Governing Vessel (Du Mai); Penetrating Vessel (Chong Mai); Girdle Vessel (Dai Mai); Yin Linking Vessel (Yin Wei Mai); Yang Linking Vessel (Yang Wei Mai); Yin Heel Vessel (Yin Qiao Mai); and Yang Heel Vessel (Yang Qiao Mai).