Morphological and positional relationships between the sigmoid sinus and the jugular bulb |
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| Authors: | Pei-Dong Dai Hong-Qi Zhang Zheng-Min Wang Yan Sha Ke-Qiang Wang Tian-Yu Zhang |
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| Institution: | (1) Central Laboratory, Eye and ENT Hospital of Fudan University, Shanghai, 200031, China;(2) Department of Anatomy and Histoembryology, Shanghai Medical School of Fudan University, Shanghai, 200032, China;(3) Department of Otorhinolaryngology, Eye and ENT Hospital of Fudan University, 83 Fenyang Road, Shanghai, 200031, People’s Republic of China;(4) Department of Radiology, Eye and ENT Hospital of Fudan University, Shanghai, 200031, China;(5) Cardiovascular Disease Institute, Zhongshan Hospital of Fudan University, Shanghai, 200032, China |
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| Abstract: | The purpose of this study was to determine the quantitative relationships between the positions of the sigmoid sinus (SS)
and jugular bulb (JB) and the influence of mastoid pneumatization upon these structures. The investigations were carried out
on 116 healthy adult ears based on the axial images of computed tomography (CT). The reference system locating the displacements
of the SS and JB was established and the shape and position of the SS and JB were measured. The volume of pneumatization was
quantitatively measured based on the serial digital images of CT. The method of partial correlation analysis was used to find
the real relationship of two variables from the complicated dependence relationships. There was a tendency for the SS in the
males to be situated more laterally and more backwardly, and the JB in the males was situated more laterally with thicker
lateral bone wall when compared to the females. When compared to the left side, the SS on the right side tended to protrude
more deeply and was situated more laterally and with less thickness of the lateral bone wall. In male, the right SS was situated
more anteriorly than the left SS. In female, the right JB was situated more posteriorly than the left JB. There was a tendency
for the SS to be situated more medially, to have a thicker lateral bone wall, and to protrude more superficially in the well-pneumatized
bones. When the pneumatization was well, the JB tended to be situated more backwards and have a thicker lateral bone wall.
However, there was no significant difference of pneumatization between the high JB group and the low JB group. The SS position
and JB position changed synchronously in forward–backward or medial–lateral directions. The results suggest that the factors
that influence the shape and position of the SS and JB are multiple. The results suggest that the morphological and positional
relationships between the SS and the JB are complicated but could be grasped. The development of the cranial base, the temporal
bone pneumatization and non-synchronous dural venous development between the right and left sides are considered to contribute
to the morphological and positional changes of the SS and JB. |
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| Keywords: | Sigmoid sinus Jugular bulb Pneumatization Morphometry Posterior cerebral fossa Anatomy |
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