brainstem

brainstem
n.
the enlarged extension upwards within the skull of the spinal cord, consisting of the medulla oblongata, the pons, and the midbrain. The pons and medulla are together known as the bulb, or bulbar area. Attached to the midbrain are the two cerebral hemispheres. See brain.

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brain·stem (brānґstem) the stalklike portion of the brain connecting the cerebral hemispheres with the spinal cord and comprising the mesencephalon, pons, and medulla oblongata; the diencephalon is considered part of the brainstem by some. Called also truncus encephalicus [TA]. Also written brain stem.

Medical dictionary. 2011.

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  • brainstem — [brān′stem΄] n. a stalklike structure at the base of the brain that connects the spinal cord with the cerebrum and includes the medulla oblongata, pons, and midbrain: also written brain stem …   English World dictionary

  • brainstem — /brayn stem /, n. 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… …   Universalium

  • brainstem — UK [ˈbreɪnˌstem] / US noun [countable] Word forms brainstem : singular brainstem plural brainstems medical the part of the brain above the spinal cord between the left and right halves of the brain …   English dictionary

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  • Brainstem glioma — A brainstem glioma is a glioma tumor in the brainstem.External links* [http://www.emedicine.com/NEURO/topic40.htm Brainstem glioma information on Emedicine] …   Wikipedia

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  • brainstem auditory evoked potential — (BAEP) that portion of the auditory evoked potential which comes from the brainstem; abnormalities can be analyzed to evaluate comas, to support diagnosis of multiple sclerosis, and to detect early posterior fossa tumors. Brainstem auditory… …   Medical dictionary

  • brainstem encephalitis — any of various symptoms caused by dysfunction of cranial nerves owing to a lesion in the brainstem, most often a paraneoplastic effect of lung or other types of cancer; manifestations may include oculomotor signs, hearing loss, dysarthria,… …   Medical dictionary

  • brainstem glioma — a heterogeneous group that includes gliomas anywhere in the brainstem; they are seen mainly in children and cause neuropathy with motor symptoms and problems of gait, speech, and swallowing. The diffuse, intrinsic type is difficult to treat and… …   Medical dictionary

  • brainstem reflexes — reflexes regulated at the level of the brainstem, such as pupillary, pharyngeal, and cough reflexes and the control of respiration. Their prolonged absence is one criterion of brain death …   Medical dictionary

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