Well, you have to search a literature by using the keywords nicotine in the brain.
Then you have to download all the corresponding papers.
Then you have to read and understand all of them so that you can write in your own way.
You can also apply your own thinking which can be possible about the effect of nicotine on the brain.
Note: All these things you have to do yourself so that you will gain more insight into what you can improve and how good you can publish. All the very best!
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