Anatomical drawing

We need a drawing for publication about what is called evoked potentials or electrical signals recorded from the brain structures when auditive stimulus is provided. I have attached 3 drawings. The one we like the most is the first. We do not need labels, just the anatomical structures (brain + 3 slices) and the pathways. The drawing need to be delivered in Adiobe Illustrator file and needs to be rendered fine both in color an grayscale and in high resolution for printing.