From the time it first comes online during development the nervous system begins to exact precise control over many biologic functions. In some cases, too much control. When it does, a little nerve-squelching botox can go a long way towards restoring that nubile glow to a previously pensive countenance. Similarly, an emerging neurobiology of cancer now suggests that many kinds tumors may be the fault of a hyperactive nervous system. If they are, then toning down the offending nerves could become an attractive therapy.
Vintage Human Nervous System Illustration (1887) Poster. Image sourced from Zazzle. Available here.