ethmoid groove
51Medial pterygoid plate — Bone: Medial pterygoid plate Sphenoid bone. Anterior and inferior surfaces. (Medial pterygoid plate labeled at bottom left.) …
52Nuchal lines — Bone: Nuchal lines Occipital bone. Outer surface …
53Mastoid canaliculus — Bone: Mastoid canaliculus Left temporal bone. Inferior surface. (Label for mastoid canaliculus is on left, sixth from the top.) Latin c. mastoideus Gray s …
54Dorsum sellae — Bone: Dorsum sellae Sphenoid bone. Upper surface. (Dorsum sellae is labeled in the white portion in the center.) …
55Internal occipital crest — Bone: Internal occipital crest Occipital bone. Inner surface. (Internal occipital crest not labeled, but occipital sinus is visible at center.) …
56Opisthion — Occipital bone at birth. (Opisthion visible but not labeled.) Gray s subject #46 181 …
57Mandibular fossa — Bone: Mandibular fossa Left temporal bone. Outer surface. (Mandibular fossa labeled at left, third from the top.) …
58Condyloid fossa — Bone: Condyloid fossa Occipital bone. Outer surface. (Condyloid fossa visible but not labeled.) Latin f. condylaris Gray s …
59Occipital plane — Bone: Occipital plane Occipital bone at birth …
60Nuchal plane — Bone: Nuchal plane Occipital bone at birth …
