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Anatomy Atlases: Illustrated Encyclopedia of Human Anatomic Variation: Opus II: Cardiovascular System: Absence of Confluens of Dural Sinuses. Anomalies of Dural Sinuses. Bifurcation and Reunion of Superior Sagittal Sinus.

Illustrated Encyclopedia of Human Anatomic Variation: Opus II: Cardiovascular System

Absence of Confluens of Dural Sinuses. Anomalies of Dural Sinuses. Bifurcation and Reunion of Superior Sagittal Sinus.

Ronald A. Bergman, PhD
Adel K. Afifi, MD, MS
Ryosuke Miyauchi, MD

Peer Review Status: Internally Peer Reviewed


Image of absence of confluens of dural sinuses

Left:Absenee of confluens (after Hallet). COL, Communication between right occipital sinus and the sigmoid sinus (on the same side) is absent; CSO, Common canal of the occipital sinuses; POI, Internal occipital protuberance; SC, Cavernous sinus; SLL, Left transverse sinus; SLR, Right transverse sinus; SLS, Superior sagittal sinus; SPI, Inferior petrosal sinus, SPS, superior petrosal sinus; SR, sinus rectus (straight sinus); TO, Foramen magnum; VC, vein (occipital emissary) communicating to region of confluens (rare observation).

Upper Right:Bifurcation of superior sagittal sinus. B, Bifurcating branch of superior sagittal sinus; PH, confluens of sinuses (torcular herophili); SLL, left transverse sinus; SLR, Right transverse sinus.

Lower Right:Bifurcation of superior sagittal sinus (after Vieq d'Azyr).

redrawn from Labbé, C., 1883

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