| 释义 |
white matter
white mattern. Whitish nerve tissue, especially of the brain and spinal cord, consisting chiefly of myelinated nerve fibers.white matter n (Anatomy) the whitish tissue of the brain and spinal cord, consisting mainly of myelinated nerve fibres. Technical name: substantia alba Compare grey matter white′ mat`ter
n. nerve tissue, esp. of the brain and spinal cord, that primarily contains myelinated fibers and is nearly white in color. Compare gray matter (def. 1). [1830–40] white matter The whitish tissue of the brain and spinal cord in vertebrate animals, made up chiefly of nerve fibers covered in myelin sheaths. Compare gray matter.white matterMyelin-sheathed nerve fibers.Thesaurus| Noun | 1. | white matter - whitish nervous tissue of the CNS consisting of neurons and their myelin sheathssubstantia albanerve tissue, nervous tissue - tissue composed of neuronsfibrous astrocyte - star-shaped cells with long processes; found in the white matter of the brain and spinal cordnerve pathway, nerve tract, pathway, tract - a bundle of myelinated nerve fibers following a path through the braincentral nervous system, CNS, systema nervosum centrale - the portion of the vertebrate nervous system consisting of the brain and spinal cord |
Translationswhite matter
white matter the whitish tissue of the brain and spinal cord, consisting mainly of myelinated nerve fibres white matter
matter [mat´er] 1. physical material having form and weight under ordinary conditions; called also substance.2. pus.gray matter areas of the nervous system where the nerve fibers are unmyelinated (not enveloped by a myelin sheath); it contains the bodies of the nerve cells. Tissue composed of myelinated fibers is called white matter. The cerebral cortex is entirely composed of gray matter and the cerebellum also contains some deep-seated masses of it. The spinal cord has a central core of gray matter surrounded by white matter; in cross section, its gray matter is shaped approximately like the letter H. Called also substantia grisea and gray substance.white matter areas of the nervous system composed mostly of myelinated nerve fibers (those having myelin sheaths) constituting the conducting portion of the brain and spinal cord. Tissue composed of unmyelinated fibers is called gray matter. Called also substantia alba and white substance.white mat·ter [TA] those regions of the brain and spinal cord that are largely or entirely composed of nerve fibers and contain few or no neuronal cell bodies or dendrites. Synonym(s): alba, substantia alba, white substancewhite mattern. Whitish nerve tissue, especially of the brain and spinal cord, consisting chiefly of myelinated nerve fibers.white mat·ter (wīt mat'ĕr) [TA] Those regions of the brain and spinal cord that are largely or entirely composed of nerve fibers and contain few or no neuronal cell bodies or dendrites.
Synonym(s): substantia alba, white substance. white matter Those parts of the central nervous system that appear white on section because they consist mainly of myelinated nerve fibres. Compare grey matter which consists mainly of nerve cell bodies.white matter the tissue of the CENTRAL NERVOUS SYSTEM, lying outside the GREY MATTER in the spinal cord but internal to grey matter in the brain of some vertebrates, and which contains the myelinated AXONS of nerves. The MYELIN SHEATHS give the tissue its white appearance.LegalSeeMatterAcronymsSeeweb mailwhite matter
Related to white matter: gray matterSynonyms for white matternoun whitish nervous tissue of the CNS consisting of neurons and their myelin sheathsSynonymsRelated Words- nerve tissue
- nervous tissue
- fibrous astrocyte
- nerve pathway
- nerve tract
- pathway
- tract
- central nervous system
- CNS
- systema nervosum centrale
|