part of part of Homo sapiens sphenoid bone zone of bone organ medial pterygoid plate of sphenoid bone 2026-03-19T00:00:00Z A zone of bone organ forming the narrower, more vertically oriented medial lamina of the pterygoid process of the sphenoid bone, curving posterolaterally at its inferior end to terminate as the pterygoid hamulus; its medial surface forms the lateral boundary of the choana and provides attachment for the pharyngeal constrictor muscles and the pterygomandibular raphe. David Osumi-Sutherland