| 释义 |
brainstem
brain·stem or brain stem B5462000 (brān′stĕm′)n. The portion of the brain, consisting of the medulla oblongata, pons Varolii, and midbrain, that connects the spinal cord to the forebrain and cerebrum.brainstem (ˈbreɪnˌstɛm) n (Anatomy) the stalklike part of the brain consisting of the medulla oblongata, the midbrain, and the pons Varoliibrain′stem` or brain′ stem`,
n. the portion of the brain that is continuous with the spinal cord and in mammals comprises the medulla oblongata and parts of the midbrain. [1875–80] brain·stem (brān′stĕm′) The part of the vertebrate brain located at the base of the brain and important in the control of many voluntary and involuntary body functions. In humans and other mammals, the brainstem is composed of the pons, medulla, and midbrain.Thesaurus| Noun | 1. |  brainstem - the part of the brain continuous with the spinal cord and comprising the medulla oblongata and pons and midbrain and parts of the hypothalamusbrain stem, brain-stemneural structure - a structure that is part of the nervous systembrain, encephalon - that part of the central nervous system that includes all the higher nervous centers; enclosed within the skull; continuous with the spinal cordmedulla oblongata, medulla, bulb - lower or hindmost part of the brain; continuous with spinal cord; (`bulb' is an old term for medulla oblongata); "the medulla oblongata is the most vital part of the brain because it contains centers controlling breathing and heart functioning"pons Varolii, pons - a band of nerve fibers linking the medulla oblongata and the cerebellum with the midbrainreticular formation, RF - a complex neural network in the central core of the brainstem; monitors the state of the body and functions in such processes as arousal and sleep and attention and muscle tone |
Translationsbrainstem
brainstem[′brān‚stem] (anatomy) The portion of the brain remaining after the cerebral hemispheres and cerebellum have been removed. brainstem
brainstem [brān´stem] the stemlike portion of the brain connecting the hemispheres" >cerebral hemispheres with the spinal cord, and comprising the pons, medulla oblongata, and midbrain; considered by some to include the diencephalon. Also written brain stem.brain·stem , brain stem (brān'stem), [TA] Originally, the entire unpaired subdivision of the brain, composed of (in anterior sequence) the rhombencephalon, mesencephalon, and diencephalon as distinguished from the brain's only paired subdivision, the telencephalon. More recently, the term's connotation has undergone several arbitrary modifications: some use it to denote no more than rhombencephalon plus mesencephalon, distinguishing that complex from the prosencephalon (diencephalon plus telencephalon); others restrict it even further to refer exclusively to the rhombencephalon. From both developmental and architectural viewpoints, the original interpretation seems preferable. Synonym(s): truncus encephali [TA]brainstem or brain stem (brān′stĕm′)n. The portion of the brain, consisting of the medulla oblongata, pons Varolii, and midbrain, that connects the spinal cord to the forebrain and cerebrum.brainstem The central stalk-like axis of the lower CNS, which connects the brain with the spinal cord.
Components
• Medulla oblongata;
• Pons;
• Midbrain;
• Diencephalon.
Functions
• Transmission and “lower cortical” processing of sensory neural impulses from the periphery and motor impulses to muscles and other effectors;
• Anatomic site of egress of cranial nerves 3 to 12;
• Reticular functions, integrating cardiorespiratory control, arousal and alertness, consciousness.brain·stem , brain stem (brān'stem) [TA] Originally, the entire unpaired subdivision of the brain, composed of the rhombencephalon, mesencephalon, and diencephalon as distinguished from the brain's only paired subdivision, the telencephalon. More recently, the connotation of the term has undergone several arbitrary modifications: some use it to denote no more than rhombencephalon plus mesencephalon, distinguishing that complex from the prosencephalon (diencephalon plus telencephalon); others restrict it even further to refer exclusively to the rhombencephalon. From both developmental and architectural viewpoints, the original interpretation seems preferable. brainstem (brān′stĕm″)  BRAINSTEMThe stemlike part of the brain that connects the cerebral hemispheres with the spinal cord. It includes the diencephalin, midbrain, and hindbrain. Some anatomists do not include the diencephalon in the brainstem. See: illustrationbrainstem The part of the brain consisting of the medulla oblongata and pons, which connects the main brain (cerebrum) to the spinal cord. The brainstem contains the ‘vital centres’ for respiration and heart-beat and the nuclei of most of the CRANIAL NERVES as well as massive motor and sensory nerve trunks passing to and from the cord.BrainstemBrain structure closest to the spinal cord, involved in controlling vital functions, movement, sensation, and nerves supplying the head and neck.Mentioned in: Progressive Supranuclear Palsybrain·stem , brain stem (brān'stem) [TA] Originally, the entire unpaired subdivision of the brain, composed of the rhombencephalon, mesencephalon, and diencephalon as distinguished from the brain's only paired subdivision, the telencephalon. More recently, the connotation of the term has undergone several arbitrary modifications: some use it to denote no more than rhombencephalon plus mesencephalon, distinguishing that complex from the prosencephalon (diencephalon plus telencephalon); others restrict it even further to refer exclusively to the rhombencephalon. From both developmental and architectural viewpoints, the original interpretation seems preferable. brainstem
Related to brainstem: midbrain, pons, brainstem gliomaSynonyms for brainstemnoun the part of the brain continuous with the spinal cord and comprising the medulla oblongata and pons and midbrain and parts of the hypothalamusSynonymsRelated Words- neural structure
- brain
- encephalon
- medulla oblongata
- medulla
- bulb
- pons Varolii
- pons
- reticular formation
- RF
|