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The midbrain, also called the mesencephalon[1], is the rostral part of the brain stem[2]. It is found between the forebrain and the hindbrain[3] and it enables the brain to combine sensory information with muscle movement[4]. The midbrain is made up of two sections: the tectum and the cerebral peduncle. The tectum makes up the rear portion of the midbrain[5] and is formed by two paired rounded swellings, the superior and inferior colliculi[6]. The cerebral peduncle consists of a dorsal and ventral part separated by the substantial nigra[7]. The dorsal part is known as the tegmentum[8], and this is located between the substantial nigra and the tectum[9] and is a major portion of the cerebral peduncle[10]


  1. Breedlove, Watson, Rosenzweig. Biological Psychology, 6th Edition, 2010,pg 43
  2. http://serendip.brynmawr.edu/bb/kinser/definitions/def-midbrain.html
  3. http://study.com/academy/lesson/midbrain-definition-function-structures.html
  4. http://study.com/academy/lesson/midbrain-definition-function-structures.html
  5. http://www.britannica.com/science/midbrain
  6. http://www.britannica.com/science/midbrain
  7. https://www.unifr.ch/biochem/index.php?id=112
  8. https://www.unifr.ch/biochem/index.php?id=112
  9. http://www.britannica.com/science/midbrain
  10. https://www.unifr.ch/biochem/index.php?id=112
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