How is REM linked with less protein synthesis in the brain?

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 How is REM linked with less protein synthesis in the brain?



Studies have shown a greater rate of protein synthesis during REM compared to NREM. These proteins promote the growth of the nervous system (incl brain) and may replenish the brain. Newborns spend about 50% of the sleep in REM, a time when the brain rapidly grows. This decreases to about 20% in adulthood and reflects a decrease in the rate of development. Cause of increase in protein synthesis is unclear, some say the increased blood flow to the brain during REM should actually prevent it.

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