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SDK
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03/28/05 - 07:13 AM             #1

Which of the following stages are decrease with age???
a)Stage I
b)Stage II
c)Stage III
d)Stage IV
e)REM stage

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netlover
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03/28/05 - 11:26 AM             #2

The answer is REM. There is a sharp drop in the amount of REM sleep after the early years, falling from 8 hours at birth to less than 1 hour in old age. The change in the amount of NREM sleep is much less marked, falling from 8 hours to about 5 hours over the lifespan.

SDK
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03/29/05 - 06:18 AM             #3

REM sleep is 20% of total sleep time & remain constant upto 80 yr of age.......after that it is decline....
1st stage 4 then stage 3..... 8) .

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netlover
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03/29/05 - 07:50 AM             #4

"SDK" wrote:
REM sleep is 20% of total sleep time & remain constant upto 80 yr of age.......after that it is decline....
1st stage 4 then stage 3..... 8) .


Where did you get the answer? In FA, it said that REM sleep ↓ with age.
I also checked other materials, some of them mentioned stage 3 & 4 decline too. I'm confused.

SDK
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03/29/05 - 08:30 AM             #5

REM sleep is cyclic pattern occur every 90 min: then how will it take 8 hrs in infants????
I read this from High yeild bahavorial Science......page no: 27,8.....

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netlover
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03/29/05 - 08:44 AM             #6

For newborns, they sleep over 20 hrs. So 8 hrs of REM should be normal.

SDK
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03/29/05 - 09:50 PM             #7

so finally,
1)REM sleep
2)4 stage
3)3 stage

thnx for additional knowledge...... 8)

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mjl1717
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03/29/05 - 09:55 PM             #8

SDK echoes my thoughts!

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