open access

Vol 62, No 3 (2003)
SHORT COMMUNICATIONS
Published online: 2003-06-09
Submitted: 2012-02-06
Get Citation

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.

open access

Vol 62, No 3 (2003)
SHORT COMMUNICATIONS
Published online: 2003-06-09
Submitted: 2012-02-06

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.
Get Citation

Keywords

Willis chords; superior sagittal sinus; brain vessels

About this article
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)

Pages

255-257

Published online

2003-06-09

Bibliographic record

Folia Morphol 2003;62(3):255-257.

Keywords

Willis chords
superior sagittal sinus
brain vessels

Authors

Alicja Kędzia
Wojciech Kędzia

Important: This website uses cookies. More >>

The cookies allow us to identify your computer and find out details about your last visit. They remembering whether you've visited the site before, so that you remain logged in - or to help us work out how many new website visitors we get each month. Most internet browsers accept cookies automatically, but you can change the settings of your browser to erase cookies or prevent automatic acceptance if you prefer.

By  "Via Medica sp. z o.o." sp.k., Świętokrzyska 73, 80–180 Gdańsk, Poland

tel.:+48 58 320 94 94, faks:+48 58 320 94 60, e-mail:  viamedica@viamedica.pl