In textbooks on anatomy, radiology and stead of the normal one. An
"accessory ar surgery only the "normal" arterial blood tery" is a second
artery ip addition to the one normally present, without any specifi
supply is usually described. This "nor mality," however, is sometimes
found in cation of size being made. However, there less than 30% of all
cases for some arteries, is no general agreement on whether minute but
in over 95% for others. Rarely men vessels with very small diameters and
hard tioned are deviations in the individual ar ly any significant blood
flow should also be tery's origin, topographical localization and
considered. the area it supplies. They can be classified The aims of
this book were twofold: first, to into two groups: malformations and
vari extract the frequency of arterial anomalies from the literature
(often published in inac ations. Malformations often have a nega tive
influence on the function of the organ cessible journals) and second, to
classity under normal circumstances, e.g. if both these arteries by
schematic outlines of the basic types."