442 



Veins of the Head. 



V. ethmoidalis posterior 

 N. opticus. 



,V. ethmoidalis anterior 



Sinus 



intercavernosus 



anterior 



V. nasofrontalis 



vorticosa 



Sinus 

 cavernosus 



Sinus 

 inter- 

 cavernosus 

 posterior 



V. lacriinalis 



V. ophthalmica superior 

 A. carotis interna 



Sinus 

 plienoparietalis 



N. 

 octilomotorius 



N. 

 trochlearis 



N. 

 ' raaxillaris 



Vv. 



meningeae 



mediae 



Plexus 

 basilaris 



v. cerebri 



Tentorium cerebelli 



Sinus trausversus 



Sinus rectus' 



Sinus 

 ^ petrosus 

 superior 



Sinus 

 transversus 



Sinus petrosus inferior 

 Sinus transversus 

 Sinus occipitalis 



483. Sinus durae matris, viewed from above. 



(The right orbit and sums cavernosus have been opened; the tentorium has been cut away.) 



a) V. ophthalmica superior (superior ophthahnic vein) (see also Fig. 4S8), devoid of valves, 

 corresponds only ajipruxiniately to the a. ophthalmica, wbit-h possesses, in addition; two 

 delicate accoinjtanying veins. It anastomoses lively above the lig. palpebrale mediale by 

 its anterior extremity (v. nasofrontalis) (see Figs. 487 and 488) with the v. angularis 

 (of the V. facialis anterior), runs l)aclvward near the m. obliquus superior, then lateral- 

 ward l)etween the n. opticus and the m. rectus sujierior, finally backward through the 

 fissura orbitalis superior into the sinus cavernosus. Medianward, it sends an anastomosis 

 to the V. ophthalmica inferior. It receives the vv. ethnioidales anterior et posterior, 

 V. lacrimalis, vv. musciilares and the veins of the bulbus oculi and of the eyelids (see 

 Sense Organs; the v. centralis retinae op^ns into the sinus cavernosus). 





