Emissary veins passing through the foramen ovale, jugular foramen, foramen lacerum, and hypoglossal canal. Because the emissary veins are valveless, they are an important part in selective brain cooling through bidirectional flow of cooler blood from the evaporating surface of the head. In general, blood flow is from external to internal but the flow can be altered by increased intracranial pressure. A type of emissary vein goes through the sphenoidal emissary foramen inferior to the zygomatic arch with the cavernous sinus on the inside of the skull. This is an important route for spread of infection because cranial nerve VI and the
The Brain from Planet Arous classic. It has been parodied on American television like the comedy series "Malcolm in the Middle", which uses a segment of "The Brain from Planet Arous" as part of the opening credits. A clip was also used in the opening scene of the comedy film "Ernest Scared Stupid" as part of a collage of horror films. "The Brain from Planet Arous" is also featured in the film "The Butcher Boy" (1997), which is viewed by the main character at his local movie theater. The voice clip: from the film was used in the 1997 Jay Weinland track "Sound Stage Strut"