The Brain is most active during REM sleep portion of sleep cycle. This portion of sleep cycle usually occurs for two hours, and when monitored, it is discovered that brain activity is mostly dynamic at this stage.
REM stands for Rapid Eye Movement and this is a stage in the sleep cycle of mammals and birds characterized by random rapid movement of the eyes.
Basically, sleep is divided into four major stages which include
The first three stages of sleep are regarded as Non-Rapid Eye movement (NREM) stages. The first three stages comprises of about 75% of the total sleep time.
This movement of the eyes is followed by minimal muscle tone throughout the body, and the higher probability of the sleeper to dream vividly.
Learn more about REM sleep at https://brainly.com/question/14290871
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