A probe and an apparatus for cerebral diagnostics and therapy, in
particular for measuring absolute values of regional cerebral flow (CBF)
and cerebral oxygenation. The probe is inserted through a burr hole in
the skull and comprises illuminating device, light receiving device and a
coating encapsulating said illuminating device and said light receiving
means. The coating has a longitudinal shape and is adapted to fit through
a burr hole in the skull. The coating is further adapted to slide between
the skull and the dura, to be inserted into the ventricular system,
and/or to be inserted into the cerebral tissue.