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
Head and Neck Cancer Alliance head and neck cancer In addition to year-round events and awareness efforts such as benefit concerts and walkathons, the Alliance sponsors a week-long series of events to promote early detection and public awareness of this disease. Oral, Head and Neck Cancer Awareness Week (OHANCAW), Cancers of the mouth (lip and tongue), larynx (voice box), pharynx (throat), salivary glands, and nose/nasal passages are generally known as head and neck cancer. These cancers typically form in the squamous cells, which are the cells lining the moistened, mucosal locations of the head and neck, such as the nose, mouth and throat. Such squamous