What is fossa posterior?

Fossa posterior is a depression located at the base of the skull, in the posterior cranial fossa. It is the largest of the three cranial fossae and is occupied mostly by the cerebellum, medulla oblongata, and the fourth ventricle.

The structure of the fossa posterior is formed largely by the occipital bone, the temporal bone, the sphenoid bone, and the parietal bones. It plays an important role in the protection of the lower regions of the brain.

The cerebellum, which is the largest part of the fossa posterior, is responsible for coordinating movement and balance, and is closely connected to the brainstem. The medulla oblongata lies beneath the cerebellum and plays a crucial role in regulating vital bodily functions such as breathing, heartbeat, and blood pressure.

Injuries to the fossa posterior can result in serious health complications, as it can affect the normal functioning of the brainstem and cerebellum. These injuries might occur as a result of trauma or degenerative conditions.