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brainstem

or brain stem

[ breyn-stem ]

noun

  1. the portion of the brain that is continuous with the spinal cord and comprises the medulla oblongata, pons, midbrain, and parts of the hypothalamus, functioning in the control of reflexes and such essential internal mechanisms as respiration and heartbeat.


brainstem

/ ˈbreɪnˌstɛm /

noun

  1. the stalklike part of the brain consisting of the medulla oblongata, the midbrain, and the pons Varolii


brainstem

/ brānstĕm′ /

  1. The part of the vertebrate brain located at the base of the brain and made up of the medulla oblongata, pons, and midbrain. The brainstem controls and regulates vital body functions, including respiration, heart rate, and blood pressure.


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Word History and Origins

Origin of brainstem1

First recorded in 1875–80; brain + stem 1

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Example Sentences

Brain death implies the complete and permanent absence of neurological function in the cortex and the brainstem.

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