33+ Posterior Cranial Fossa Boundaries Pictures. The posterior cranial fossa is the most posterior aspect of the skull base housing the brainstem and cerebellum. Gross anatomy the following structures are present from anterior to posterior:
Iii, iv the oculomotor nerve (iii) arises from the interpeduncular fossa on the ventral aspect of the midbrain.
Tumors in the posterior fossa are considered critical brain lesions, primarily because of the limited space within the posterior fossa and the potential involvement of vital brain stem nuclei. Crista galli of ethmoid bone. What is the anterior boundary of the middle cranial fossa? The anterior cranial fossa constitutes the floor of cranial vault which houses the frontal lobes of the brain.
