Hi @henry-9ja. I think your article needs more explanation. The subject was confusing, maybe you can lead with some introduction to sleep spindle, why do we care at all about sleep spindle and the rest of the stages of sleep.

The picture you were using is not reusable unless you have been consented by the original author. You need to use an image which is reusable and link it to the author and license information. Please refer here if you're not familiar with what I was talking about.

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