Dream coherence :

after start sleep :

6 h 4 m : left right beta and beta coherence

6 h 5 m : small power left right theta and beta. some coherence : delta, theta and beta

6 h 6 m : small power left right theta and beta.

6 h 7 m : left right delta. delta coherence.

6 h 8 m : left right delta. delta and beta coherence.

6 h 9 m : left right beta. and wake up.