FIG 2. Left jugular bulb region. The ACC (asterisk) and its connections with surrounding veins are shown. The proximal portions of both transverse sinuses and confluens sinuum have been removed for better visualization. Double arrowhead, inferior petrooccipital vein; arrow, basilar plexus; double arrow, branch to prevertebral venous plexus; r, middle meningeal veins; d, cavernous sinus; a, superior jugular bulb; e, inferior petrosal sinus; c, sigmoid sinus; g, posterior condylar vein; h, lateral condylar vein; f, anterior condylar vein; j, vertebral artery venous plexus; k, anastomosis between anterior internal vertebral venous plexus and vertebral artery venous plexus; i, anterior internal vertebral venous plexus; m, deep cervical vein; b, transverse sinus; l, internal carotid artery venous plexus of Rektorzik; s, emissary vein of the foramen ovale; v, pterygoid plexus; t, intervertebral veins, including inter atlanto-occipital vein.

A, Posterior view.

B, Anterior view.