Basilar part of occipital bone
|Basilar part of occipital bone|
Occipital bone inner surface (basilar part is shown in red)
Occipital bone outer surface, at birth (basilar part is at bottom)
|Latin||Pars basilaris ossis occipitalis|
|Anatomical terms of bone|
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.
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 tectorial membrane
On the lateral margins of this surface are faint grooves for the inferior petrosal sinuses.