REM&NREM

Its the 1st stage you enter when you begin sleeping. Your muscles relax while the pace of your breathing, metabolism, and heart begins to decrease. // (look like youir in a dead state.) //
 * NREM** - slower brain wave accompanied by non-rapid eye movement // (dreamless stage) //

In this stage you are in a deep sleep and your heart & breathing will increase. The activity of you inner body will somewhat resemble that of when you are away. Your most vivid and memorable dreaming occurs in this phase. Also, in this phase you are moving and blinking a lot. //(*nightmares occur during REM)//
 * REM** - state of fast, irregular brain wave pattern accompanied by rapid eye moment // (25% of your sleep) //

1 - it serves as housekeeping, cleaning out unnecessary info 2 - it strengthens crucial memories from your active life and helps to retain them.
 * 2 Theories of REM**

How much sleep should people get?
 * Newborn** - 16 hours of sleep
 * *20yrs ** - 8 hours
 * 60yrs** - a further reduction of REM sleep.