Mark R. Brink lic. phil.
Swiss Federal Institute of Technology Zurich
Institute for behavioral sciences
> Is it possible for Testosterone to pass the Blood-Brain Barrier? This
> is an important question when it comes to behavioral studies claiming
> direct nexii between the level of testosterone and certain kinds of
> behavior (e.g. aggression).
Do not forget about possibility of indirect action. A chemical that
itself does not cross blood-brain barrier can still have an effect on
the brain by modulating release of endogenous agents.
One example is nootropic drugs - some of them do not cross blood-brain
barrier but their effect depends on the function of adrenal glands.*
Sergei Gutnikov, D.Phil. (Oxon)
Department of Clinical Neurology
[*] showed by Cesare Mondadori (Switzerland), full reference to
published papers can be found in Medline