Final answer:
The median sulcus divides the rhomboid fossa into two symmetrical halves on the dorsal surface of the Pons. This structure is within the posterior cranial fossa, which contains the cerebellum and is bounded by the petrous ridges and occipital bone.
Step-by-step explanation:
The rhomboid fossa is divided into two symmetrical halves on the dorsal surface of the Pons by the median sulcus. The median sulcus is a feature of the floor of the fourth ventricle, which is located within the posterior cranial fossa. This fossa contains the cerebellum and is the most posterior and deepest part of the cranial cavity, bounded anteriorly by the petrous ridges, while the occipital bone forms the floor and posterior wall. The foramen magnum plays a role in dividing this area at the midline, allowing for the passage of the spinal cord.