Figure 2 (IMAGE)

Tohoku University

Figure 2

Caption

Brain blood volume dynamics reorganize during the transition to REM sleep. During NREM sleep, fast local brain blood volume fluctuations propagated from anterior to posterior cortex in about 1 second (left). During the transition to REM sleep, local brain blood volume began to rise about 50 seconds before the ECoG-defined REM onset (center). This increase started in posterior cortex and spread anteriorly over about 15 seconds (right), suggesting that REM sleep is preceded by a posterior-to-anterior metabolic preparation process involving vascular responses.
 

Credit

Yusuke Takahashi, Yoko Ikoma, Ko Matsui

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