The sixth of the seven chakras, placed by some commentators in the region of the brow, by others in the middle of the forehead of the hu physiology. In traditional iconography the Ajna or Brow chakra has two petals, is associated with the tattwa (element) of Manas or Mind, which is beyond even the most subtle elements (although still part of embodied existence). It is said to be white in color. In some yoga schools it is taken as a point for mental focus, among other schools as the location of the "mental atom". It is also identified with the "third eye" (eye of psychic vision), and other such concepts not found in the original Tantrika system.