A Morphological study and morphometric analysis of the jugular foramen

Prefulla, P R (2016) A Morphological study and morphometric analysis of the jugular foramen. Masters thesis, Madras Medical College, Chennai.

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Abstract

The Jugular Foramen is a complex crossroad of neurovascular structures at the skull base. Anomalies of the jugular bulb, glomus jugulare tumours, schwannomas, metastatic lesions and infiltrating inflammatory processes attract the clinicians attention to this region.. Knowledge of the anatomy of Jugular Foramen is vital for a favourable surgical outcome in the technically challenging operations of this region. This study was aimed at analysing the Jugular Foramen morphologically and morphometrically. 100 adult human dry skulls at the Institute of Anatomy, Madras Medical College were used for the study. The features of the Jugular Foramen and Jugular Fossa were studied sincerely and the numerical data obtained were analysed statistically. In the present study it was found that the mean mediolateral diameter of the Jugular Foramen was 14.87+/- 2.47mm on the right side and 13.76+/- 2.37mm on the left side. The mean anteroposterior diameter of the Jugular Foramen was 11.90 +/-1.93mm on the right side and 10.88+/-1.82mm on the left side. The mediolateral diameter and anteroposterior diameter of the Jugular Foramen exhibited positive correlation. The mean area of the right Jugular Foramen was 179.23+/- 49.39mm2 and the same of the left Jugular Foramen was 151.65+/- 43.58mm2. The Jugular Foramen showed side dominance in most of the specimens. Right side was dominant in 69% and left side was dominant in 25%. The mean width of the Jugular Fossa was 7.90+/-1.80mm on the right side and 7.40+/-1.66mm on the left side. The mean depth of the Jugular Fossa was 11.20+/- 3.07mm on the right side and 10.05 +/- 2.85mm on the left side. The width and depth the Jugular Fossa exhibited positive correlation. The Jugular Foramen and Jugular Fossa exhibited statistically significant asymmetry in size. Domed Jugular Fossa was present bilaterally in 69%, unilaterally on the right side in 22%, unilaterally on the left side in 5% and was bilaterally absent in 4%. The Jugular Foramen was partitioned by one septum in 32% on the right side and 29% on the left side. The incidence of complete septum was 17% on the right side and 15% on the left side. The incidence of incomplete septum was 16% on the right side and 13% on the left side. Tripartite Jugular Foramen was present in 1% of skulls, bilaterally. An accessory opening was present in the posteromedial wall of the Jugular Foramen in 7% on the right side and 4% on the left side. In 91% it led to the posterior condylar canal and in 9%, the other end of the canal opened at the posterior margin of foramen magnum. The findings of the present study supported the features of Jugular Foramen reported in the Indian subcontinent. The findings were found to be dissimilar to those of foreign studies suggesting racial variations in the features of Jugular Foramen. The data obtained will be useful for neurosurgeons and otorhinolaryngologists for achieving a less morbid and more favourable outcome in surgeries of the Jugular Foramen region. The findings are also enlightening to anthropologists, radiologists and anatomists.

Item Type: Thesis (Masters)
Uncontrolled Keywords: Jugular Foramen; Septum; Dominance; Jugular Fossa; Dome; Jugular Bulb.
Subjects: MEDICAL > Anatomy
Depositing User: Punitha K
Date Deposited: 28 Jul 2017 11:23
Last Modified: 16 Mar 2018 05:27
URI: http://repository-tnmgrmu.ac.in/id/eprint/2350

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