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Front 1

SPHENOPARIETAL SINUS

Back 1

M. Sphenoparietal sinus: courses medially on the inferior surface ofthe lesser
wing ofthe sphenoid and drains into the cavernous sinus

Front 2

EMISSARY VEINS

ANASTOMIC CHANNELS...

Back 2

N. Emissary veins

1. Anastomotic channels between intracranial dural venous sinuses and
extracranial veins; some emissary veins are noted below

Front 3

EMISSARY VEINS

MASTOID EMISSARY VEIN

Back 3

2. Mastoid emissary vein: traverses the mastoid foramen; connects the sig-
moid sinus with the occipital and posterior auricular veins

Front 4

EMISSARY VEINS

PARIETAL EMISSARY VEIN

Back 4

3. Parietal emissary vein: traverses the parietal foramen; connects the
superior sagittal sinus and occipital vein

Front 5

EMISSARY VEINS

EMISSARY VEIN OF THE FORAMEN CECUM

Back 5

4. Emissary vein ofthe foramen cecum: present in the child, but often ab-
sent in the adult; connects the superior sagittal sinus with veins ofthe
nose

Front 6

CONDYLAR EMISSARY VEIN (INCONSTANT)

Back 6

5. Condylar emissary vein (inconstant): traverses the condylar canal; con-
nects the sigmoid sinus and external vertebra] venous plexus

Front 7

EMISSARY VEINS

TRAVERSE WHAT? CONNECT WHAT?

Back 7

6. Emissary veins also traverse foramen ovale and foramen lacerum; they
connect the cavernous sinus with the pterygoid venous plexus