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Have noticed the 1.5 month old smiling when asleep.

Do newborns have dreams when they sleep? If yes, then what kind? If no, then what could be the reason of their sleep smiles?

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A telephone survey among several hundred 1.5 month olds was inconclusive. –  Philipp Aug 11 '13 at 13:30
They might smile in their sleep when releasing wind. –  James Bradbury Aug 12 '13 at 9:09
There is no reason to suppose that they cannot dream. It would be very interesting to see what they dream. I suspect that it would be similar to watching a "trippy" movie since they cannot see well. Probably a bunch of blurry colors, lots of noise, and food. After all, that's all they know. –  Dan Andrews Aug 12 '13 at 16:31
Oh... older people smile when they flatulent as well. We just suppress it while in the office. –  Dan Andrews Aug 12 '13 at 16:33

1 Answer 1

up vote 4 down vote accepted

At that age smiling is often associated with gas.

As I mentioned in another answer, the question of whether or not newborns dream has not been conclusively answered. From that answer:

I have seen so many different ages quoted for the start of dreaming that I have given up on determining when it actually starts. For example in Parenting sleep expert Jodi Mindell says that newborns may actually be dreaming in REM sleep, though only in images and not in words, but nightmares probably don't begin until 2 or 3. Again researchers are reported according to this pediatrician to have shown that newborns dream but nightmares don't begin until around 3. According to Scientific American some scientists believe that while REM sleep occurs in newborns dreams don't happen until much later.

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