The Midbrain is a part of the brain that is also known as the “Middle Brain”. Its structure is made up of the brain stem which connects all the brain spaces (the brainstem bridge, the cerebellum and the diencephalon). Its position can be deduced by its other name, "Middle Brain", because the Midbrain is located in the central inner part of the entire brain mass. Through this section of the brain, there is a conduit through which the cerebrospinal fluid passes, which is responsible for the mechanical stability of the body among other things.
Specifically, the function of the midbrain is the conduction and control of the motor impulses that go from the cerebral cortex to the junction of the spine and the brain (brainstem bridge). It is also responsible for the sensory impulses that manifest in the spinal cord. A section of the midbrain called superior quadrigeminal tubercles is responsible for the movements made by the eye globules as a sensory response to any stimulus that causes the sense of sight, this is because the oculomotor nerve is located here. The inner quadrigeminal tubercles record auditory stimuli perceived by the ear as well as related head movements.
In the midbrain for study it can be divided into three parts or faces: a triangular anterior part in which the optic chiasm and the optic bands are contained, which are part of the eyes, on the lateral part is the conjunctival arm connected with the medial and internal geniculate body. On the back are the already explained Quadrigeminal Tubers, there are 4, clearly divided into superior and inferior.
