The most detailed description of
circulus arteriosus cerebri was published by Kanan, but this work don't showed photographs and topography by sections of these vessels in relation to the different parts of the head and encephalon.
This is why a more precise expression in this context would indeed be an antivicious circle: a non-cycle of existence, i.e., a
circulus antivitiosus.
The previously mentioned interaction has the potential for positive feedback and
circulus vitiosus creation.
Each scale was measured along a reference line drawn along the longest axis of the posterior portion of the scale from the center of the focus to the leading edge of the 9th
circulus (Sa), 21st
circulus (Sb), 1st annulus (Sc), 2nd annulus (S2), 3rd annulus (S3), and to the edge of the scale (S4).
Circulus present between abdominal segments III and IV, with an intersegmental crease.