An elliptical fenestra perforates the obturator process. A large fenestra perforates the humeral deltopectoral crest. Formina perforates the maxilla, especially in the area of the canine. "he perforates" < PCelt ; "goat" < PCelt (cf. This perforates the foundation, making it easier to tear away after the block is completed. Occasionally, it perforates the Scalenus anterior; more rarely it passes in front of that muscle.