Is there a specific part of the brain that, as far as we can tell, is used for logic?

I am writing a story which includes a surgical procedure to enhance a persons logic. I am looking for a specific part of the brain that, as far as we can tell with decent science, directly influences logical thinking.

Is there a region like this that I could use?

I know logic is complex and spread out, I’m just looking for something specific that has some influence.