(3) The diploic veins, the veins of the brain, and the venous sinuses of the dura mater.
It is formed by a confluence of the veins of the pterygoid plexus, and passes backward between the sphenomandibular ligament and the neck of the mandible, and unites with the temporal vein to form the posterior facial vein.
The parietal emissary vein connects it with the superior sagittal sinus; and as it passes across the mastoid portion of the temporal bone, it receives the mastoid emissary vein which connects it with the transverse sinus.
The nasociliary nerve is the sensory nerve to the eyeball and is accompanied by the ophthalmic artery.
The terminal branches of the ophthalmic artery are the supratrochlear and dorsal nasal arteries.
The superiorophthalmicvein is formed near the root of the nose and allows the spread of superficial infections of the face to the cavernous sinus (figs.
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