Rock Trumpet – Mandevilla

About 5 centimetres (2.0 in) in front of the occipital pole of the human brain, on the infero-lateral border is an indentation or notch, named the preoccipital notch. It is considered a landmark because the occipital lobe is located just behind the line that connects that notch with the parietoccipital sulcus.

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  Preoccipital notch (shown in red)

This article incorporates text in the public domain from page 818 of the 20th edition of Gray's Anatomy (1918)