Floor Of The Skull
The base of skull also known as the cranial base or the cranial floor is the most inferior area of the skull.
Floor of the skull. Anterior fossa fossa cranii anterior. The skull base offers support from the bottom of the brain. Inside the skull the floor of the cranial cavity is subdivided into three cranial fossae spaces which increase in depth from anterior to posterior see figure 4 figure 6b and figure 9.
A small area of the ethmoid bone consisting of the crista galli and cribriform plates is located at the midline of this fossa. Since the brain occupies these areas the shape of each conforms to the shape of the brain regions that it contains. This anatomic region is complex and poses surgical challenges for otolaryngologists and.
The anterior cranial fossa is located between the frontal bone and lesser wing of the sphenoid bone. Skull cranial floor bone markings part 2 temporal bone. Frontal region of the floor of skull.
The ethmoid bone also forms the lateral walls of the upper nasal cavity. Posterior region of the floor of skull. Floor of the skull.
On the interior of the skull the ethmoid also forms a portion of the floor of the anterior cranial cavity. The floor of the cranial cavity increases in depth from front to back and is divided into three cranial fossae. At the base of the skull is bone that supports 4 brain components the frontal lobe temporal lobe brain stem and cerebellum.
The upper surface of the base of the skull or floor of the cranial cavity presents three fossæ called the anterior middle and posterior cranial fossæ. Medially near the orbital margin is located the groove for nasolacrimal duct. The sphenoid bone is a butterfly shaped cranial bone that is located in the middle of the skull between the frontal and temporal bones.