midbrain
noun
mid·brain
| \ ˈmid-ˌbrān
\
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Definition of midbrain
: the middle of the three primary divisions of the developing vertebrate brain or the corresponding part of the adult brain between the forebrain and hindbrain that includes the tectum, tegmentum, and substantia nigra
— called also mesencephalon
— see brain illustrationExamples of midbrain in a Sentence
Recent Examples on the Web
Although only two of the 38 players received a concussion, more than two-thirds of them showed changes to the integrity of the white matter of their midbrains. — Eva Frederick, Science | AAAS, "Just one season of playing football—even without a concussion—can cause brain damage," 7 Aug. 2019 Characterized by muscle stiffness and tremors, Parkinson's is caused by the death of dopamine-producing neurons in a section of the midbrain. — Ferris Jabr, Scientific American, "How the Brain Gets Addicted to Gambling," 14 May 2018 One set of axons projected to the periacqueductal gray in the midbrain, an area involved in motor behaviors. — Lydia Denworth, Scientific American, "A Command Center in the Mammalian Brain Orchestrates Parenting Behaviors," 11 Apr. 2018These example sentences are selected automatically from various online news sources to reflect current usage of the word 'midbrain.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.
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More Definitions for midbrain
midbrain
noun
mid·brain
| \ ˈmid-ˌbrān
\
\
Medical Definition of midbrain
: the middle division of the three primary divisions of the developing vertebrate brain or the corresponding part of the adult brain that includes a ventral part containing the cerebral peduncles and a dorsal tectum containing the corpora quadrigemina and that surrounds the aqueduct of Sylvius connecting the third and fourth ventricles
— called also mesencephalon