The Point of Confession

I was reading Heart-Shaped Box earlier, admitting as I was reading that I didn't possess a half-decent command of a technical poetic vocabulary to describe the cadences of prose. Are there any critics who have written about the pulse of a sentence, or a paragraph, or a chapter, or a section? Who has described - a writer - about the rhetorical significance of a run-on sentence, or vernacular speech, or dashes, or commas, or epigraphs, or section titles, or picto-graphic icons spread across a book, like the drawing of a heart in Heart-Shaped Box with each section number etched into its own heart?

Who can I read to understand better?