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WHAT IS THE ROLE OF MIDBRAIN

Midbrain has regions that are concerned with the sense of sight and hearing. Some regions of the midbrain transmit motor impulses to the limbs.
Midbrain controls visual, auditory system and eye movement. It is the smallest part of brain but controls overall body movement.

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It controls vision, hearing, motor control, sleep, alertness, and temperature regulation. It is basically the center for sensory perception and autonomous functions.

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The midbrain or the mesencephalon is considered part of the brainstem. Its substantia nigra is closely associated with motor system pathways of the basal ganglia. The human mesencephalon is archipallian in origin, meaning its general architecture is shared with the most ancient of vertebrates. Dopamine produced in the substantia nigra and ventral tegmental area plays a role in motivation and habituation of species from humans to the most elementary animals such as insects. Laboratory house mice from lines that have been selectively bred for high voluntary wheel running have enlarged midbrains. The midbrain helps to relay information for vision and hearing.

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