This is formed from the cribriform plate of the ethmoid bone. It forms, along with other bones of the braincase, the boundary of the cranial cavity which containd the brain and meninges.
The rostral wall of the brain case is called the ethmoid bone. Together with the other bones of the braincase it forms the boundaries of the cranial cavity that encloses the brain and the meninges.
It is literally called the frontal bone. The whole braincase is made of the frontal, two parietal bones, one occipital bone, the sphenoid, two temporal bones and the ethmoid.