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Sulcus for sigmoid sinus of ...
Other Terms: Sillon du sinus sigmoïde
This is an impression on the internal surface of the bone at the mastoid angle. The impression is formed by a small portion of the sigmoid venous sinus near its confluence with the transverse venous sinus.
Sulcus is Latin for groove or a hollow channel. Sigmoid means shaped like the letter "S." It comes from the Greek letter "S" or sigma.
Sillon du sinus sigmoïde