Abstract
During more than a century of observations and experiences by neuro-scientists, involving a broad spec-trum of neurosurgical procedures and diagnostic investigations, it became apparent very early that congenital malformations, degenerative, infectious, toxic, hypoxic, vascular and neoplastic lesions occur at specific predilection sites within certain compartments of the CNS. This postulate will be presented, discussed and illustrated with radiologic and clinical documentation.
