<unk>  is a venous anomaly where a communication between the intracranial dural<unk> es and dilated epicranial venous structures exists. That venous anomaly is a collection of nonmuscular venous blood vessels adhering tightly to the outer surface of the skull and directly communicating with intracranial venous<unk> es through diploic veins. The venous collections receive blood from and drain into the intracranial venous<unk> es. The varicosities are intimately associated with the periosteum, are distensible, and vary in size when changes in intracranial pressure occur.
Sinus pericranii
Cortical homunculus
Cave of septum pellucidum
Anterior funiculus
Tapetum lucidum
Otic vesicle
Stenopaeic slit
Frenulum breve