Occipital sinus
It is situated in the attached margin of the falx cerebelli.It commences near the foramen magnum, and ends by draining into the confluence of sinuses.Occipital sinuses were discovered by Guichard Joseph Duverney.[citation needed] The occipital sinus is present in around 65% of individuals.[2] The occipital sinus commences around the margin of the foramen magnum[2] by several small venous channels (one of which joins the terminal part of the sigmoid sinus).