Ustra = Camel, asana = posture or pose
Pronounced : OOHS-tra-AA-SUN-aa
Ustrasana is an intermediate level back-bending yoga posture known to open Anahata (Heart chakra). This yoga posture adds flexibility and strength to the body and also helps in improving digestion.
How to do Ustrasana (Camel pose)
from Yoga Buzz http://www.artofliving.org/yoga/yoga-poses/ustrasana-camel-pose