Basilar Plexus

The basilar plexus (transverse or basilar sinus) consists of several interlacing venous channels between the layers of the dura mater over the basilar part of the occipital bone (the clivus), and serves to connect the two inferior petrosal sinuses.

It communicates with the anterior vertebral venous plexus.

This article incorporates text from a public domain edition of Gray's Anatomy.

Veins (emissary, jugular and others) of head and neck (drainage patterns can vary) (TA A12.3.04–06, GA 7.644)
External jugular
Retromandibular maxillary (pterygoid plexus) · superficial temporal (anterior auricular)
Direct

posterior auricular

transverse cervical · suprascapular · anterior jugular (jugular venous arch)
Internal jugular
Diploic/brain
Cerebral

Superficial cerebral veins: superior · superficial middle · inferior · inferior anastomotic (Labbé) · superior anastomotic (Trolard)

Deep cerebral veins: great · internal (basal, deep middle, superior thalamostriate)
Cerebellar superior · inferior
Sinuses
To COS superior sagittal · straight (inferior sagittal) · occipital
To CS sphenoparietal · intercavernous
superior ophthalmic (ethmoidal, central retinal, nasofrontal, vorticose veins) · inferior ophthalmic
To IJV sigmoid: transverse (petrosquamous) · superior petrosal
inferior petrosal (basilar plexus, internal auditory veins) · condylar
Facial/common facial frontal · supraorbital · angular · superior labial · inferior labial · deep facial
Direct lingual (dorsal lingual, deep lingual, sublingual) · pharyngeal · superior thyroid (superior laryngeal) · middle thyroid
Brachiocephalic
Vertebral

occipital (occipital emissary) · suboccipital venous plexus

deep cervical
Direct inferior thyroid (inferior laryngeal) · thymic

M: VAS

anat (a:h/u/t/a/l,v:h/u/t/a/l)/phys/devp/cell/prot

noco/syva/cong/lyvd/tumr, sysi/epon, injr

proc, drug (C2s+n/3/4/5/7/8/9)