vertebral body

olives

medullary pontine sulcus

vertebral body cross

broad bulge on ventral side

A longitudinal shallow groove on the midline of the base of the pons [accommodating the basilar artery]

The base narrows outward and rearward to form the middle cerebellar peduncle, also known as the pontine arm.

There is a thick longitudinal ridge on each side called the cerebral peduncle.

The depression between the cerebral crura on both sides is called the interpeduncular fossa, and the bottom of the fossa is called the posterior perforated substance [a small hole with many blood vessels entering and exiting]

The lower part is shaped like a spinal cord, with two enlargements on each side of the posterior median sulcus, and a thin fasciculus tubercle on the medial side.

The outer surface is the cuneate fasciculus tubercle [the deep surface contains the core of the thin fasciculus and the cuneate fasciculus respectively, which are the termination nuclei of the thin fasciculus and cuneate fasciculus]

The bulge above and outside the tubercle of the cuneate bundle is the inferior cerebellar peduncle, also known as the cord-like body, and the fibers in it are connected backward to the cerebellum.

The outer upper limit of the rhombus fossa, also known as the combined arm

upper hill

inferior colliculus

above

the following

In the lateral part of the medulla oblongata-pontine sulcus, the junction of the medulla oblongata, pons and cerebellum, is clinically called the pontocerebellar triangle. Vestibulocochlear neurofibromas can compress the facial nerve, trigeminal nerve, glossopharyngeal nerve, and vagus nerve.