Lambda waves are very high-frequency brainwaves associated with wholeness and integration. They are also associated with mystical and out-of-body experiences. Lambda brainwaves are rarely seen in most people but are present in the minds of Tibetian monks who can sit for hours meditating. Lambda states of consciousness are associated with the ability of certain sects of Tibetan monks who can mediate in the Himalayan mountains in sub-zero temperatures wearing little clothing.