   Prana is a term employed in various forms of yoga. In Hindu
yoga teachings it signifies a subtle vitality contained in the
air that is modified by the human body to govern its essential
functions. (see also Pranic Healing) In Hatha yoga training this
vitality is enhanced by special yoga exercises known as
Pranayama.  By a combination of Hatha yoga exercises and
Pranayama techniques a latent force known as kundalini is
aroused with the human body. Usually it is thought that when
kunalini resides below the heart chakra it can cause rampant
sexual desires, ego inflation, and other stressful problems, but
when aroused and conducted all the way up the spine to the crown
chakra in the brain it can produce higher consciousness and
transcendental states. A.G.H.  Sources: 9, 1318; 29, 319-321.