part of part of zone of bone organ squamous part of occipital bone external occipital protuberance https://github.com/obophenotype/uberon/issues/166 Wikipedia:External_occipital_protuberance UBERON:0013469 FMA:75752 SCTID:139582005 The external occipital protuberance is a bony prominence occuring on the large area ventral to the external sagittal crest. It functions as the attachment site for the funicular part of the nuchal ligament[MURDOCH:734]. Near the middle of the occipital squama is the external occipital protuberance, and extending lateralward from it on either side is the superior nuchal line, and above this the faintly marked highest nuchal line. It is less pronounced in females. The inion is the highest point of the external occipital protuberance. a projection on the external surface of the squamous part of the occipital bone in the midline. inion