What is Midbrain? - Earth.com

What is Midbrain?

The midbrain, also known as the mesencephalon is the part of the brain most responsible for:

  • vision
  • motor control
  • arousal
  • temperature regulation
  • alertness
  • hearing

Formation and Orientation

The midbrain located under the cerebral cortex and above the hindbrain. the mesencephalon is not divided into any other portions of the brain unlike the other two vesicles that stem from the neural tube.
There are four separate lobes on the side of the cerebral aqueduct within the midbrain. These are separated into the superior and the inferior colliculi. The superior colliculus is in charge of optics while the inferior colliculus is in charge of audible information.

Also found on the cerebral aqueduct are the cerebral peduncles. Between the cerebral peduncles are interpeduncular fossa, the trochlear nerve and the oculomotor nerve, which is in charge of eye movement and pupil constriction.


the function of midbrain is to create a response to sensory information and making sure that the body recognizes input that is received.

Image Caption: This is a section in the transverse plane through the human midbrain at the level of the superior colliculus. The front of the head is near the bottom of the picture. Credit: Wikipedia (CC BY-SA 3.0)

News coming your way
The biggest news about our planet delivered to you each day