Jugular foramen
| Jugular foramen | |
|---|---|
| File:Foramenjugulare.PNG Base of skull. Inferior surface. (label for jugular foramen is at right, third from the bottom) | |
| Details | |
| Part of | Skull |
| System | Skeletal system |
| Identifiers | |
| Latin | foramen jugulare |
| TA98 | Lua error in Module:Wikidata at line 746: attempt to index field 'wikibase' (a nil value). |
| TH | {{#property:P1694}} |
| TE | {{#property:P1693}} |
| FMA | {{#property:P1402}} |
| Anatomical terminology [[[d:Lua error in Module:Wikidata at line 865: attempt to index field 'wikibase' (a nil value).|edit on Wikidata]]] | |
A jugular foramen is one of the two (left and right) large foramina (openings) in the base of the skull, located behind the carotid canal. It is formed by the temporal bone and the occipital bone. It allows many structures to pass, including the inferior petrosal sinus, three cranial nerves, the sigmoid sinus, and the posterior meningeal artery.
Structure
[edit | edit source]The jugular foramen is formed in front by the petrous portion of the temporal bone, and behind by the occipital bone.[1] It is generally slightly larger on the right side than on the left side.
Contents
[edit | edit source]The jugular foramen may be subdivided into three compartments, each with their own contents.
- The anterior compartment transmits the inferior petrosal sinus.
- The intermediate compartment transmits the glossopharyngeal nerve, the vagus nerve,[1] and the accessory nerve.
- The posterior compartment transmits the sigmoid sinus (becoming the internal jugular vein),[1] and some meningeal branches from the occipital artery and ascending pharyngeal artery.
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, (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 | edit source]Obstruction of the jugular foramen can result in jugular foramen syndrome.[2][3]
Additional images
[edit | edit source]-
Jugular foramen
-
Base of the skull. Upper surface.
See also
[edit | edit source]References
[edit | edit source]Public domain This article incorporates text in the public domain from the 20th edition of Gray's Anatomy (1918)
- ^ a b c Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value).
- ^ Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value).
- ^ Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value).
External links
[edit | edit source]
- Anatomy figure: 22:5b-12 at Human Anatomy Online, SUNY Downstate Medical Center
- Anatomy figure: 22:4a-08 at Human Anatomy Online, SUNY Downstate Medical Center
- cranialnerves at The Anatomy Lesson by Wesley Norman (Georgetown University) (IX, XI)
- Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value).
- UCSD Archived 2021-10-21 at the Wayback Machine
Lua error in mw.title.lua at line 392: bad argument #2 to 'title.new' (unrecognized namespace name 'Portal'). Lua error in Module:Authority_control at line 153: attempt to index field 'wikibase' (a nil value).