Skallbaser

Skallbaser refers to the base of the skull, the floor of the cranial cavity that supports the brain and forms the point of contact with the facial skeleton. It is commonly divided into the anterior cranial fossa, the middle cranial fossa, and the posterior cranial fossa. The bones contributing to the skull base include portions of the frontal, ethmoid, sphenoid, temporal, and occipital bones, with the surrounding sphenoid and temporal regions forming the primary boundaries. The skull base contains numerous foramina and canals that transmit cranial nerves and major vessels, including the optic canal, superior orbital fissure, foramen rotundum, foramen ovale, carotid canal, internal auditory meatus, jugular foramen, hypoglossal canal, and the foramen magnum.

Developmentally, the skull base forms from cartilaginous precursors that fuse with the neurocranium during childhood, creating the basioccipital and basisphenoid portions that anchor the cranial cavity.

Clinically, the skull base is a key region in trauma and disease. Basilar skull fractures can cause cranial nerve deficits, cerebrospinal fluid leaks, and periorbital ecchymosis. Neoplasms such as chordomas and meningiomas, inflammatory conditions, and congenital anomalies may involve the skull base. Imaging typically begins with CT to evaluate bony detail and is complemented by MRI for soft tissue and neural structures.

Notes: In medical usage, skallbaser is the non-English term for skull base and is used in anatomical and clinical contexts to denote this region.