Processo articular superior - Processus articularis superior
The superior articular processes project from it on either side; they are oval, concave, directed backward and medialward, like the superior articular processes of a lumbar vertebra. They are attached to the body of the first sacral vertebra and to the alæ by short thick pedicles.
This definition incorporates text from a public domain edition of Gray's Anatomy (20th U.S. edition of Gray's Anatomy of the Human Body, published in 1918 – from http://www.bartleby.com/107/).
Anatomia geral > Ossos; sistema esquelético > Esqueleto axial > Coluna vertebral > Sacro [vértebras sacrais I - V] > Base do sacro > Processo articular superior