Contents Of Jugular Foramen

The critical structures traversing the jugular foramen are the sigmoid sinus and jugular bulb, the inferior petrosal sinus (IPS), meningeal branches of the ascending pharyngeal and occipital arteries, and cranial nerves (CN) IX, X, and XI (Fig. 82-1).

In addition, within the foramen are CN ganglia (superior and inferior ganglia of CN IX and X) and CN branches, including the tympanic branch of CN IX (Jacobson's nerve) and the auricular branch of CN X (Arnold's nerve). In close proximity to the jugular foramen are the ICA anteriorly and CN XII posteromedially.

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