Vol 62, No 3 (2003)
Short communication
Submitted: 2012-02-06
Published online: 2003-06-09
Morphology of the Willis chords in the superior sagittal sinus during various periods of life
Alicja Kędzia, Wojciech Kędzia
Folia Morphol 2003;62(3):255-257.
Vol 62, No 3 (2003)
SHORT COMMUNICATIONS
Submitted: 2012-02-06
Published online: 2003-06-09
Abstract
Numerous fibrous elements known as the Willis chords are situated in the light of the superior sagittal sinus. The paper is aimed at a comparative evaluation of the appearance of the Willis chords appearing in the superior sagittal sinus during various periods of human life and a determination of their role. The material comprises 200 brains at the foetal period as well as 200 adult and senile brains. The experimental methods include injection methods, infrared light, the Pickworth method and computer image analysis. During adulthood, various elements such as valvulae, divisions, plates, beams and arachnoidal granulation are situated in the light of superior sagittal sinus. The number of arachnoidal granulations
increases continuously due to age, new ones appearing close to those
already in existence and old granulation spreading. The superior sagittal sinus contains numerous valvulae similar to the feedback flaps typical for hydraulic systems. Divisions act as orifices which lead to a fall in pressure and induce blood into the sinus. Large differences between the cross-sections of meningeal veins and bridge veins were noticed, which resembles the structure of ejector. The blood flow in the bridge veins ending at the superior sagittal sinus is controlled by the valvulae and their geometrical form changes according to age.
Conclusion: the Willis chords situated in the superior sagittal sinus may control the circulation. Their number grows with age and their morphology changes.
Abstract
Numerous fibrous elements known as the Willis chords are situated in the light of the superior sagittal sinus. The paper is aimed at a comparative evaluation of the appearance of the Willis chords appearing in the superior sagittal sinus during various periods of human life and a determination of their role. The material comprises 200 brains at the foetal period as well as 200 adult and senile brains. The experimental methods include injection methods, infrared light, the Pickworth method and computer image analysis. During adulthood, various elements such as valvulae, divisions, plates, beams and arachnoidal granulation are situated in the light of superior sagittal sinus. The number of arachnoidal granulations
increases continuously due to age, new ones appearing close to those
already in existence and old granulation spreading. The superior sagittal sinus contains numerous valvulae similar to the feedback flaps typical for hydraulic systems. Divisions act as orifices which lead to a fall in pressure and induce blood into the sinus. Large differences between the cross-sections of meningeal veins and bridge veins were noticed, which resembles the structure of ejector. The blood flow in the bridge veins ending at the superior sagittal sinus is controlled by the valvulae and their geometrical form changes according to age.
Conclusion: the Willis chords situated in the superior sagittal sinus may control the circulation. Their number grows with age and their morphology changes.
Keywords
Willis chords; superior sagittal sinus; brain vessels
Title
Morphology of the Willis chords in the superior sagittal sinus during various periods of life
Journal
Folia Morphologica
Issue
Vol 62, No 3 (2003)
Article type
Short communication
Pages
255-257
Published online
2003-06-09
Page views
409
Article views/downloads
1005
Bibliographic record
Folia Morphol 2003;62(3):255-257.
Keywords
Willis chords
superior sagittal sinus
brain vessels
Authors
Alicja Kędzia
Wojciech Kędzia
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