So what could explain which of the many networks of?

Question

So what could explain which of the many networks of cells firing away in our heads is heard above the background chatter?

what does this sentence mean?

English to English, literal translation please..

I''m a foreigner.

I'd like to know..

Answer 1

How can we tell which particular set of cells working in our brains will be dominant against all the background noise?

This could be literal (in discussing hearing/deafness) or it could be metaphorical, in which case it would refer to the dominant idea in our minds.