Morphology And Morphometric Study On Anatomical Variations Of Jugular Foramen In Adult Human Skulls

Background: Jugular foramen, a large irregular foramen at the base of the skull , lies at the posterior end of petrooccipital suture between jugular process of occipital bone and jugular fossa of petrous part of temporal bone;above and lateral to foramen magnum. Many important structures pass through this foramen. Among these areInferior Petrosal Sinus, presence of three cranial nerves 9, 10, and 11 and Internal Jugular vein.The increasinguse of modern diagnostic procedures and new surgical approaches has created a need for much more detailedanatomical studies and explanations.Materials and Methods: The study was conducted in Osteology lab of Anatomy Department,KarpagaVinayagaInstitute of Medical Sciences, Chinnakolambakkam,Madurntakam taluk,Tamilnadu (India). 66 jugular foraminaof 33 Adult human skulls have been examined for study.Results and Conclusion: The morphometric and morphological analysis of jugular foramen were done in 33skulls, and the results obtained are mentioned below. The Mean average width of foramen is 15.26mm and theRange is between 10mm and 21mm. The Mean average length of foramen is 10mm and the Range is between 6mmand 14mm.Regarding, the size of the foramina; the Right side is larger than the Left side. Incomplete Intrajugularprocess is the commonest observation observed (in 64 foramina).Regarding,Intra Jugular Process contributionfor foramen, it is mainly from Temporal bone. Separate foramen for IPS was found only in one foramen out of 66foramina observed.The height of dome of jugular fossa is more on the Right than on the Left side (in 60.6% ofskulls).The range of Height of the Dome is 6.41mm to 18.46mm and the Mean average is 12.11mm.

Carotid Aneurysm Found as Middle Ear Cavity Mass / 대한이비인후과학회지

Aneurysm may be classified into intracranial and extracranial according to its location. Extracranial aneurysm is relatively uncommon compared to intracranial aneurysm and it is rare in the middle ear cavity. The causes of extracranial aneurysm include atherosclerosis, dysplasia, blunt or penetrating trauma, local radiotherapy, acute dissection and infective lesions. Among the extracranial aneurysm, it is reported that carotid aneurysm in the temporal bone may be confused with glomus body tumor, which is usually larger. A typical presentation is pulsatile mass and it may accompany neurologic symptoms. We report a case with a review of literature of an external carotid aneurysm in the jugular fossa and middle ear cavity.

The Study of The Applied Anatomy of The Jugular Fossa / 昆明医科大学学报

The anatomical relations of the jugular fossa with the vertical portion of the facial canal, the posterior cranial fossa and the tympanic ring were surveyed in 100 adults, skulls(57 males, 43 females); the dimensions of the jugular fossa were measured. The depth of the jugular fossais 7.73?0.33(2.0-1.52mm) at left, 9.47 ? 0.34mm(2.8-19.0mm) at right. The thickness of the bony plate separating the jugular fossa from the vertical partion of the facial canal is 2.77 ?0.17(1.5-2.8mm) at left, 2.33?0.17mm(1.0-2.9mm) at right. The top of the jugular fossa above the tympnic ring level is accounted for 35% at left, 62.24% at right. In these surveys, some anatomical variances were observed. These data can give the reference to the clinicians in the operations of the facial nerve and the jugular bulb.