The bones of the braincase (neurocranium) form the boundaries of the cranial cavity that encloses the brain and the meninges. The roof of the cavity (calvaria) is formed by the interparietal, parietal and frontal bones. The lateral boundaries of each side are formed by the temporal bone. The floor is formed by the sphenoid bone and the basilar part of the occipital bone. The caudal (nuchal) wall is formed by the occipital bone, and the nasal wall is formed by the ethmoid bone.

The bones of the braincase can be classified into two groups:

A. Paired bones of the braincase:

B. Unpaired bones of the braincase: