Illustrated Encyclopedia of Human Anatomic Variation: Opus II: Cardiovascular System
Ronald A. Bergman, PhD
Adel K. Afifi, MD, MS
Ryosuke Miyauchi, MD
Peer Review Status: Internally Peer Reviewed
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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