THE INTRAORBITAL ARRANGEMENT OF THE ANTERIOR AND POSTERIOR ETHMOIDAL FORAMINA

This study, instigated by surgical observations, and mainly carried ou t on the dry bone, attempts to analyse both the depth and variability of the anterior and posterior ethmoidal foramina through which pass th e ethmoidal aa. The surgical implications of this study relate not onl y to ligation of the ethmoidal aa, in certain cases of epistaxis, thei r embolisation and the endonasal microsurgery of the ethmoid, but also to the surgery of the anterior cranial fossa. The study is based on 2 00 anatomic observations.