You are correct. The sentence should read,
"In particular attention is drawn to the way in which activity in one part or subsystem of the brain can lead quite naturally, but usually in a little time, to activity in another part."
Your uncertainty about the use of the word "drawn" may be due to the passive construction of the the sentence, which needlessly obscures who or what is drawing your attention. To rephrase the sentence in an active construction (or "active voice" as it is sometimes called) it might read,
This chapter will draw your attention to the way activity in one part of your brain affects activity in another part.
In both cases, "draw" or "drawn" means "to focus" or "to direct" your attention.
See this link for other examples of "draw": http://dictionary.cambridge.org/us/dictionary/english/draw
("Drawn" is simply the past participle of "draw.")