Basilar part of occipital bone

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Basilar part of occipital bone
Basilar part of occipital bone14.png
Occipital bone inner surface (basilar part is shown in red)
Parsbasilaris(young).PNG
Occipital bone outer surface, at birth (basilar part is at bottom)
Details
Latin Pars basilaris ossis occipitalis
Identifiers
Gray's p.132
Dorlands
/Elsevier
p_07/12616362
TA A02.1.04.005
FMA FMA:52858
Anatomical terms of bone

The basilar part of the occipital bone extends forward and upward from the foramen magnum, and presents in front an area more or less quadrilateral in outline.

In the young skull this area is rough and uneven, and is joined to the body of the sphenoid by a plate of cartilage.

By the twenty-fifth year this cartilaginous plate is ossified, and the occipital and sphenoid form a continuous bone.

Surfaces[edit]

On its lower surface, about 1 cm. in front of the foramen magnum, is the pharyngeal tubercle which gives attachment to the fibrous raphé of the pharynx.

On either side of the middle line the Longus capitis and Rectus capitis anterior are inserted, and immediately in front of the foramen magnum the anterior atlantoöccipital membrane is attached.

The upper surface, constitutes the lower half of clivus, presents a broad, shallow groove which inclines upward and forward from the foramen magnum; it supports the medulla oblongata, and near the margin of the foramen magnum gives attachment to the membrana tectoria.

On the lateral margins of this surface are faint grooves for the inferior petrosal sinuses.

Additional images[edit]

References[edit]

This article incorporates text from a public domain edition of Gray's Anatomy.

External links[edit]