NEET PG DENTAL EXAM

Detailed explanation-1: -On the other hand, the midbrain tectum consists of the corpora quadrigemina and is responsible for auditory and visual reflexes. This term indicates several phylogenetically old nuclei located throughout the brainstem.

Detailed explanation-2: -The posterior surface of the midbrain contains the corpora quadrigemina, which are composed of bilateral superior colliculi and bilateral inferior colliculi. The superior colliculi are involved in visual reflexes such as saccadic eye movements.

Detailed explanation-3: -The superior colliculus is on the posterior midbrain, rostral to the inferior colliculus, and caudal to the pineal gland. It has seven internal cell layers, divided into superficial, intermediate, and deep layers. The superficial layers consist of stratum zonale, stratum griseum superficiale, and stratum opticum.