Brain -> Body

Hey, is it possible to form a direct link between higher level brain and lower level body functions? That is, what I see, hear, touch, etc. changes body functions predictably. Like, changing hear-beat rate at will and healing one’s own wound just by thinking.
More realistic applications can be like:
* I see the structure of HIV antibodies in a magazine and my brain directs the body to generate HIV antibodies using the information contained the picture
* More insulin production in diabetic patients by thinking alone.