458 



VEINS OF THE HEAD AND NECK. 



the temporal into the internal jugular vein, or from the facial into the 

 external jugular. 



Fte. 811. 



Fig. 311. DIAGRAMMATIC VIEW OP THE SINUSES OP THE DURA MATER AND SOME OP THE 

 DEEP VEINS OF THE NECK AND HEAD (modified from Cloquet and other sources). ^ 



The greater part of the calvariurn has been removed ; but an arched strip has been 

 kept in the fore and upper part of the region of the superior longitudinal sinus. The 

 occiput has been entirely removed so as to expose the lateral sinus and its termination in 

 the jugular vein. a, the falx cerebri ; b, the tentorium cerebelli of the right side ; c, 

 zygomatic arch ; d, malar bone ; e, angle of the jaw ; /, spiuous process of the axis 

 vertebra; 1, superior longitudinal sinus; 2, inferior longitudinal sinus; 2, 3, straight 

 sinus ; 2', internal veins of the brain (veins of Galen) ; 3, lateral sinus, descending to 

 4, the commencement of the internal jugular ; 3', superior petrosal sinus ; 4, 4, the 

 internal jugular vein ; 5, 5, superficial temporal vein, leading into the external jugular 

 vein ; 6, middle temporal ; 7, posterior auricular ; 8, internal maxillary ; 8', pterygoid 

 plexus and communications with the deep temporal veins ; 9, communicating branch 

 between the facial, temporal and external jugular ; 9', pharyngeal branches ; 10, facial 

 vein; 10', submental branch; 10", continuation of the facial into the angular; 11, an 

 occasional branch from the neck ; 12, vertebral vein and artery ; 13, external spinal 

 veins forming a plexus over the vertebral arches; 14, occipital sinus communicating 

 above the atlas with the spinal plexus. 



