Internal Cranial Floor View

The sphenoid bone is a butterfly shaped cranial bone that is located in the middle of the skull between the frontal and temporal bones.

Internal cranial floor view.

The glabella superciliary arches and mastoid processes are less prominent and the corresponding air sinuses are small or rudimentary. Running lateral from this point on either side are the transverse sinuses. The skull floor consists of a series of anterior to posterior depressions or fossae. The anterior fossa is formed by the orbital plates of the frontal bone cribriform plate of the ethmoid and lesser wings of the sphenoid.

External and internal views of base of skull. Its walls are thinner and its muscular ridges less strongly marked. B dorsal view of the braincase floor with the segmented brain endocast blue endosseous labyrinth pink cranial nerves yellow and carotid. The base of skull also known as the cranial base or the cranial floor is the most inferior area of the skull it is composed of the endocranium and the lower parts of the skull roof.

The midsagittal section below shows the difference between the relatively smooth upper surface and the bumpy grooved lower surface. The floor of the middle cranial fossa and part of the posterior cranial fossa is formed by the temporal bone. Five bones contribute to the skull base three unpaired midlines bones ethmoid sphenoid and occipital bones and the paired temporal bones figure 4 1. The sphenoid bone is a single complex bone of the central skull.

The skull of an adult female is as a rule lighter and smaller and its cranial capacity about 10 per cent. A the hard palate is formed anteriorly by the palatine processes of the maxilla bones and posteriorly by the horizontal plate of the palatine bones. This view of the posterior skull shows attachment sites for muscles and joints that support the skull. The skull base forms the floor of the cranial cavity and serves as a major interface between the intracranial compartment and the facial structures.

Or temporal squama pars squamosa. Skull cranial floor bone markings part 2 temporal bone. Another feature is the internal occipital protuberance which is a small projection of the internal surface of the occipital bone in the midline. Less than that of the male.

A dorsal view of the isolated braincase floor. It serves as a keystone bone because it joins with almost every other bone of the skull. Posterior view of skull. Anterior middle and posterior.

If you separate the cranial bones from the facial bones and first cervical vertebra and remove the brain you would be able to view the internal surfaces of the neurocranium.