YOU SAID:

I have no idea what the heck this is doing for my brain

INTO JAPANESE

私はこれが私の脳のために一体何をしているのか分かりません

BACK INTO ENGLISH

I don't know what this is doing for my brain

INTO JAPANESE

これが私の脳に何をしているのか分かりません

BACK INTO ENGLISH

I don't know what this is doing to my brain

INTO JAPANESE

これが私の脳に何をしているかわからない

BACK INTO ENGLISH

I don't know what this is doing in my brain

INTO JAPANESE

これが私の脳で何をしているのか分からない

BACK INTO ENGLISH

I don't know what this is doing in my brain