. Inferior surface. (label for jugular foramen is at right, third from the bottom)
jugular is a large aperture in the foramen base of the skull. It is located behind the carotid canal and is formed in front by the petrous portion of the temporal, and behind by the occipital; it is generally larger on the right than on the left side.
Contents [ edit ]
The jugular foramen may be subdivided into three compartments, each with their own contents.
An alternative imaging based subclassification exists, delineated by the
jugular spine which is a bony ridge partially separating the jugular foramen into two parts:
The smaller, anteromedial, "pars nervosa" compartment contains
CN IX, Jacobson nerve (or the tympanic nerve, a branch of CN IX), and receives the venous return from inferior petrosal sinus. The larger, posterolateral, "pars vascularis" compartment contains
CN X, CN XI, Arnold's nerve (or the auricular branch of CN X involved in the Arnold's reflex, where external auditory meatus stimulation causes cough), jugular bulb, and posterior meningeal branch of ascending pharyngeal artery.
Clinical significance [ edit ]
Obstruction can result in "
Vernet's syndrome". [1 ] [2 ]
Additional images [ edit ]
Base of the skull. Upper surface.
References [ edit ]
See also [ edit ]
External links [ edit ]
This article incorporates text from a public domain edition of Gray's Anatomy .