THE VEINS OF THE HEAD AND NECK 285 



uniting to form a single trunk which joins the corresponding 

 innominate. 



The superior intercostal vein drains the two or three spaces 

 below the first, and enters on the right side the large azygos; 

 on the left side it communicates with the left upper azygos and 

 joins the innominate. 



THE VEINS OF THE HEAD AND NECK 



The facial vein runs from the inner angle of the eye to the 

 anterior border of the masse ter muscle, then backward below 

 the jaw, joining the anterior division of the temporomaxillary 

 trunk to form the common facial, which joins the internal 

 jugular. It sends a communicating tributary along the front of 

 the sternomastoid to the anterior jugular. At its origin it is 

 continuous with the angular, a vein formed by the union of 

 the frontal and supraorbital. 



The temporomaxillary vein (posterior facial) is a short trunk, 

 formed by the temporal and internal maxillary veins, runs from 

 opposite the condyle of the lower jaw to the angle of the jaw, 

 and divides into an anterior branch joining the facial and a 

 posterior branch running backward to form with the posterior 

 auricular the external jugular. This vein is embedded in the 

 parotid gland external to the external carotid artery. 



The temporal vein is formed by the union of the superficial 

 with the middle temporal vein, and crosses over the zygoma and 

 under the parotid to join the internal maxillary vein. It 

 receives the anterior auricular, parotid, and transverse facial veins, 

 and tributaries from a plexus around the articulation of the 

 jaw. 



The internal maxillary vein arises from the pterygoid plexus 

 and runs in company with the first part of the artery, joining 

 the temporal vein behind the ramus of the jaw. 



The posterior auricular vein descends over the mastoid process 

 and sternomastoid and ends in the external jugular. 



The occipital veins, two or three, join the deep cervical vein. 



The emissary vein in the mastoid foramen connects the lateral 

 sinus with the most external of the occipital veins. 



The external jugular vein is formed by the union of the pos- 

 terior auricular and the posterior division of the temporo- 



