In many places Srila Prabhupada has written of the three stages of consciousness: susupti (deep sleep), svapna (the dreaming stage), and jagarti (the awakened state). Many studies assert that the majority of long and complex dreams take place in a fraction of second, right before a person wakes up. This is supported by the concept of svapna, that there is a stage in which one is semi-conscious, in which dreams take place.