what happen to the brain when we sleep?

Question

Is thje brain still working while we are sleeping?

Answer 1

Yes - http://en.wikipedia.org/wiki/Sleep

Answer 2

Yes, it still works. You usually are just using a different part of your brain. But, it all really depends on the stage of sleep.
Non-REM sleep (NREM), accounts for 75-80% of total sleep time:
Stage 1, with near-disappearance of the alpha waves seen in awake states, and appearance for the first time of theta waves. The stage is sometimes referred to as somnolence, or "drowsy sleep". It appears at sleep onset (as it is mostly a transition state into Stage 2) and can be associated with so-called hypnagogic hallucinations. In this period, the subject loses some muscle tone, and conscious awareness of the external environment: Stage 1 can be thought of as a gateway state between wake and sleep.
Stage 2, with "sleep spindles" (12–16 Hz) and "K-complexes". The EMG lowers, and conscious awareness of the external environment disappears. This occupies 45-55% of total sleep.
Stage 3, with delta waves, also called delta rhythms (.5-4 Hz), is considered part of slow-wave sleep (SWS) and functions primarily as a transition into stage four. Overall it occupies 3-8% of total sleep time.
Stage 4 is true delta sleep. It predominates the first third of the night and accounts for 10-15% of total sleep time. This is often described as the deepest stage of sleep; it is exceedingly difficult to wake a subject in this state. This is the stage in which night terrors, bed wetting, and sleepwalking occur.

Answer 3

it sets into a resting state for cell recovery. During this period, involuntary muscles involved in respiration remain active for oxygenation as well as part of the brain itself that controls that. yes the brain never sleeps.

Answer 4

When we go to sleep part of our brain remains alert &part of it
goes to rest. Specially the parts of brain controlling heart beat,
respiration, blood circulation &skin sensitivity remains alert &
other parts goto rest.

Answer 5

Of course....i guess you were sleeping when you asked that question.

Don't you ever dream....It's a know fact that people who have REM sleep, sleep better and are more well rested than those who do not....you might try it sometime.

Answer 6

dreams,dreams,dreams,the brain realy never slows down,gut steps up

Answer 7

it plays memories. that is why when you do something be4 u sleep,u will remember it the next day...

Answer 8

It rests.