WAVES OF THE HEART
The biophysics of nerve and muscle is more than the mass of abstract knowledge to come later in this book, though you will find this knowledge interesting, I hope, and in places perhaps even amusing. People use the biophysics of nerve and muscle every minute of every day to help save lives in some hospital or other. To prove this point, let us in imagination visit a modern hospital and look around.
We enter not through the front door as an ordinary visitor would, nor via the emergency entrance like a patient rushed there in an ambulance. We go in through the side door, so to speak--the entrance used by the technicians and scientists who run its laboratories. These are the people who measure some response the sick person makes and compare it with what a healthy response would be. They earn their livings by providing physicians with the laboratory information that makes scientific diagnosis and treatment possible. Modern medicine demands many such scientific measurements on the patient--chemical, biological, physical--and so we could visit a good many different laboratories in our