Morphology of the dorsal sagittal sinus.

<p>(<b>A</b>) Schematic drawing of corrosion cast, dorsal view. (<b>B</b>) Corrosion cast, dorsal view. The dorsal sagittal sinus (DSS) was the major cerebral venous drainage of the dorsal sinus system. Along its course, the DSS received ethmoidal, cerebral, meningeal, and diploic veins from the skull. Its superficial profile showed an axial groove over the whole length and nodular protrusions on the caudal one-third of the DSS (B, arrowheads). (<b>C</b>) Corrosion cast, lateral left view. The confluences of the dorsal cerebral veins (DCV) with the DSS showed pinhead-like openings called lateral venous lacunae (LVLs; A, C, D, E) and providing cerebrospinal fluid drainage into the venous system. (<b>D</b>) MRV, coronal section (maximum intensity projection of E, green). (<b>E</b>) MRV, sagittal section. The LVLs are interlinked between the DCV and the DSS in two different sections of MRV. <b>DCV:</b> dorsal cerebral vein, <b>DPS:</b> dorsal petrosal sinus, <b>DSS:</b> dorsal sagittal sinus, <b>EV:</b> ethmoidal vein, <b>LVLs:</b> lateral venous lacunae, <b>SiS:</b> sigmoid sinus, <b>TeS:</b> temporal sinus, <b>TrS:</b> transverse sinus.