part of part of Homo sapiens occipital bone zone of bone organ inferior nuchal line of squamous part of occipital bone 2026-03-19T00:00:00Z A zone of bone organ forming the lower of two transverse ridges on the outer surface of the squamous occipital bone, extending laterally from the external occipital crest. It marks the attachment of the rectus capitis posterior major and minor muscles. David Osumi-Sutherland