SINUS, OCCIPITAL
\sˈa͡ɪnəs], \sˈaɪnəs], \s_ˈaɪ_n_ə_s]\
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These sinuses commence at the sides of the foramen magnum ossis occipitis, and ascend-becoming broader and nearer each other- into the substance of the falx cerebelli, where they frequently unite. Each opens into the inferior part of the torcular Herophili. They receive the veins of the falx cerebelli, of the dura mater which lines the fossae cerebelli, and of the posterior part of the cerebellum. Haller and Summering have given them the name of posterior occipital sinuses, to distinguish them from the transverse sinus, which they have called anterior occipital sinus.
By Robley Dunglison
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