NEET PG DENTAL EXAM

Detailed explanation-1: -The posterior surface of the adult midbrain is characterized by four elevations collectively called the corpora quadrigemina (Fig. 13.4).

Detailed explanation-2: -Corpora quadrigemina is the Latin terminology for the quadrigeminal bodies, also known as the colliculi. These round eminences are located on the posterior surface of the midbrain, just below the thalamus. There are two superior and two inferior colliculi, with one of each sitting on either side of the midline.

Detailed explanation-3: -There are three main parts of the midbrain-the colliculi, the tegmentum, and the cerebral peduncles.

Detailed explanation-4: -The mesencephalon forms the upper part of the brain stem. It carries corpora quadrigemina (also called as optic lobes or tectum) on the dorsal side and cerebral peduncles (also called as crura cerebrii) on the ventral side of the cerebral aqueduct.