![]() It features two kidney-shaped prominences called occipital condyles that form articulation with the first cervical vertebra (C1), thus giving rise to the atlanto-occipital joint. Each of the two condylar parts contains an upper and lower surface. The condylar parts are commonly known as the lateral parts of the occipital bone, as they are found lateral to the foramen magnum. The other muscles attached to the lower surface are rectus capitis anterior and longus capitis. The lower surface features the pharyngeal tubercle, where the superior pharyngeal constrictor muscle and fibrous pharyngeal raphe insert. It has a broad, shallow groove that supports the medulla oblongata. ![]() It has an upper surface and a lower surface.ĭuring adolescence, the upper surface of the basilar part articulates with the sphenoid bone to form the clivus. This quadrilateral part of the bone is adjacent to the petrous part of the temporal bone and anterior to the foramen magnum. Occipital Bone Anatomy Labeled Surfaces and Landmarks
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