Neurosurgeons perform ventricular taps with great frequency. …While this is not something to be done lightly, the risks are no greater than those for… - Richard Bergland

During electroconvulsive therapy the blood-brain barrier is opened and during the time that it remains open there are heroically high levels of circulating pituitary hormones. Thus there is every reason to believe that... it delivers hormones to the brain...

Somehow the same nurses, physicians, administrators and legal ombudsmen who prevented the study of the ventricular fluid of a patient with senile dementia, or obesity, or depression, or schizophrenia, because of the risks, will encourage diagnostic tests and therapy for patients with epilepsy that are far more destructive and immutable than the measurement and manipulation of hormones in the ventricle.

By placing… cell-containing soup in bullet-shaped cell cages formed out of permeable plastics, a single population of cells can be introduced into the brain. ...the hormones that are produced by the cells make their way... into the brain. ...'artificial glands' …with no fear of cell migration.