Term Name:	preoccipital notch
Synonyms:	incisura parieto-occipitalis, incisura praeoccipitalis, incisura preoccipitalis, PON
Definition:	Small indentation on the inferior surface of the cerebral cortex at the border of the occiptal and parietal lobes. It is considered as a landmark because the occipital lobe is located just behind the line that connects that notch with the parietoccipital sulcus (adapted from Wikipedia).
Ontology:	Uberon Ontology [UBERON:0002698]