Main vein that drains the brain?

internal jugular!

The Internal Jugular drains the brain via the collection of blood from the superior sagittal sinus, inferior sagittal sinus, straight sinus, right transverse sinus, sigmoid sinus, and cavernous sinus...

Veins that draw blood from the brain are called dural venous sinuses. They receive oxygen-poor blood from the brain and pass it on to either the sigmoid sinus or the inferior petrosal sinus, which...

Internal Jugular

Brain drain is also known as "The human capital flight". It can be simply defined as the mass emigration of technically skilled people from one country to another country. Brain-drain can have many...