Skull base

The skull base is the underside of the brain's skull, on which the brain rests. Read more about the structure of the skull base!

Skull base

The Skull base is the lower part of the brain skull and is formed by different bones. It has twelve passages for vessels and nerves that connect the brain to the face, neck and the rest of the body. One differentiates between an inner and an outer skull base. The former is subdivided into the three skulls. Read all important information about the skull base: anatomy, function and injuries!

What is the skull base?

The skull base is the underside of the brain's skull, on which the brain rests. It is divided into two parts:

Inner skull base

It is made up of different bones and divided into three parts:

  • Anterior cranial fossa: formed by the forehead, colander and sphenoid bone. Accommodates the frontal lobe of the brain. In the middle lies the Siebbeinplatte, through whose holes the olfactory nerves pull. Bound from above to the eye and nasal cavities.
  • Medial fossa: formed by temporal and sphenoid bone. Contains the temporal lobe of the brain and has the most entry and exit points for nerves and vessels. Divided by the Turkish saddle (Sella turcica), which houses the pituitary gland.
  • posterior fossa: formed by occiput and temporal bone. Contains the cerebellum.

Outer skull base

It is mostly made up of the facial skull. Its anterior part consists of the bony palate and the upper dental arch.

The middle part extends from the posterior margin of the palate to the foramen magnum, laterally to the mastoid of the temporal bone and to the zygomatic arch. In the middle is the beginning of the throat. The nasal conchae and the nasal passages are located to the side of the processes of the sphenoid, which are separated at this point by the plowsharp (Vomer).

The posterior part of the outer skull base is the neck area. This is where the neck muscles on the skull start.

What is the function of the skull base?

The skull base protects the brain and connects it to the rest of the body through a total of twelve points of passage through which vessels and nerves pass.

Where is the skull base located?

The skull base is located at the junction of the first cervical vertebra to the skull and represents the lower part of the skull.

What problems can the skull base cause?

A skull base fracture is caused by blunt force on the skull, for example in a traffic accident. If the bones of the cranial fossa are injured, this is life-threatening, because then the brain is affected. Typical symptoms of skull fracture are bruising around or around both eyes and behind the ears. The leakage of blood or a clear fluid (cerebrospinal fluid = cerebrospinal fluid) from the ear, nose and mouth indicates a fracture of the Skull base out.

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