Harvey Cushing

…Her father, Harvey Williams Cushing, was the most famous neurosurgeon of his era, a Harvard man who pioneered modern brain surgery, trained an entire generation of neurological specialists, and won a Pulitzer Prize for a biography of his mentor William Osler, because apparently saving thousands of lives was insufficient as a single career.…

…Harvey Cushing at Yale did that in the late 18th century, took brain-dead patients, injected them with dye, methylene blue, I think, The blood-brain barrier came about when nothing went into the brain and nothing went into the testicle. Two areas of the body that were completely immune from normal transport processes. Wow. Blood-testis barrier.…