What is corpora quadrigemina? Name the functions associated with it.

Corpora quadrigemina are a part of mid-brain. It consists of four bodies therefore known as quadrigemina where quad stands for four. It is located at the distal portion of the midbrain. It is divided into two parts where upper two calculi (spherical structures) are called superior calculi and lower calculi are called inferior calculi. It can be better understood with the following diagram showing its location and parts.

Functions associated with the corpora quadrigemina- They are involved in the regulation of reflexes associated with the vision, hearing.