NCIt definition : A dural partition that separates the occipital lobes of the cerebrum from the cerebellum
and divides the cranial cavity into supratentorial and infratentorial compartments;
it helps to stabilize the brain within the cranial cavity.;
Alternative definition : CDISC: A laminar extension of the dura mater that lies between, and separates, the
cerebrum and the cerebellum. (NCI);