334 VEINS OF THE NECK. 



The Superior petrosal sinuses pass obliquely backwards along the 

 attached border of the tentorium, on the upper margin of the petrous 

 portion of the temporal bone, and establish a communication between 

 the cavernous and lateral sinus at each side. They receive one or 

 two cerebral veins from the inferior part of the middle lobes, and a 

 cerebellar vein from the anterior border of the cerebellum. 



Fig. 119 * 



The Transverse sinus (basilar, anterior occipital) passes trans- 

 versely across the basilar process of the occipital bone, forming a 

 communication between the two inferior petrosal sinuses. 



VEINS OP THE NECK. 



The veins of the neck which return the blood from the head are 

 the 



External jugular, 

 Anterior jugular, 

 Internal jugular, 

 Vertebral. 



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

 terior auricular vein with the temporo-maxillary, and commences 



* The sinuses of the base of the skull. 1. The ophthalmic veins. 2. The cavernous 

 sinus of one side. 3. The circular sinus ; the figure occupies the position of the pitui- 

 tary gland in the sella turcica. 4. The inferior petrosal sinus. 5. The transverse or 

 anterior occipital sinus. 6. The superior petrosal sinus. 7. The internal jugular 

 vein. 8. The foramen magnum. 9. The occipital sinuses. 10. The torcular Hero- 

 phili. 11,11. The lateral sinuses. 



