open access

Vol 67, No 2 (2008)
ORIGINAL ARTICLES
Published online: 2008-03-06
Submitted: 2012-02-06
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The size of venous foramina and skull capacity in man and selected vertebrate species

J. Wysocki
Folia Morphol 2008;67(2):98-103.

open access

Vol 67, No 2 (2008)
ORIGINAL ARTICLES
Published online: 2008-03-06
Submitted: 2012-02-06

Abstract

In many experiments it was proved that brain cooling systems in mammals and birds depend on the flow of the cool venous blood into the cranial cavity through a well-developed system of foramina. In order to investigate the anatomical basis of this mechanism a morphological study was undertaken. On 10 species of mammals and birds, a correlation between the skull capacity and the size of its main venous foramina was determined. A computer system of image analysis was used. In man the skull that was the largest, however consisted venous foramina of the smallest size. Moreover, the asymmetry of the foramina and the concentration of the outflow in one dominant foramen was the greatest. Probably the dominance of only one venous foramen on each side of the human skull provides the reduction of flow resistance and creates more advantageous conditions for blood outflow from the skull, and therefore, better conditions for brain cooling.
(Folia Morphol 2008; 67: 98–103)

Abstract

In many experiments it was proved that brain cooling systems in mammals and birds depend on the flow of the cool venous blood into the cranial cavity through a well-developed system of foramina. In order to investigate the anatomical basis of this mechanism a morphological study was undertaken. On 10 species of mammals and birds, a correlation between the skull capacity and the size of its main venous foramina was determined. A computer system of image analysis was used. In man the skull that was the largest, however consisted venous foramina of the smallest size. Moreover, the asymmetry of the foramina and the concentration of the outflow in one dominant foramen was the greatest. Probably the dominance of only one venous foramen on each side of the human skull provides the reduction of flow resistance and creates more advantageous conditions for blood outflow from the skull, and therefore, better conditions for brain cooling.
(Folia Morphol 2008; 67: 98–103)
Get Citation

Keywords

skull; capacity; foramina; venous outflow; anatomy; vertebrates

About this article
Title

The size of venous foramina and skull capacity in man and selected vertebrate species

Journal

Folia Morphologica

Issue

Vol 67, No 2 (2008)

Pages

98-103

Published online

2008-03-06

Bibliographic record

Folia Morphol 2008;67(2):98-103.

Keywords

skull
capacity
foramina
venous outflow
anatomy
vertebrates

Authors

J. Wysocki

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