The large vestibular gland is a paired organ located in the pyramids of the temporal bones, on the border between the pyramids and the petrous part of the temporal bone. Functions: forms cerebrospinal fluid (CSF) by splitting the cerebroplacental junction; fills the intercellular space between the endothelium of the choroid plexuses and the meninges, as well as between the arachnoid and pial surfaces of the cerebellar hemispheres; carries out reabsorption of cerebrospinal fluid into the venous blood; participates in metabolism, carries out immune processes. In humans it reaches larger sizes than in animals and is characterized by significant elasticity, permeability and