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  2. White matter - Wikipedia

    en.wikipedia.org/wiki/White_matter

    White matter is composed of bundles, which connect various grey matter areas (the locations of nerve cell bodies) of the brain to each other, and carry nerve impulses between neurons. Myelin acts as an insulator, which allows electrical signals to jump , rather than coursing through the axon, increasing the speed of transmission of all nerve ...

  3. Grey matter - Wikipedia

    en.wikipedia.org/wiki/Grey_matter

    Grey matter contains most of the brain's neuronal cell bodies. [6] The grey matter includes regions of the brain involved in muscle control, and sensory perception such as seeing and hearing, memory, emotions, speech, decision-making, and self-control. The grey matter in the spinal cord is split into three grey columns:

  4. Human brain - Wikipedia

    en.wikipedia.org/wiki/Human_brain

    The cortical layers of neurons constitute much of the cerebral grey matter, while the deeper subcortical regions of myelinated axons, make up the white matter. [7] The white matter of the brain makes up about half of the total brain volume. [16]

  5. Substantia innominata - Wikipedia

    en.wikipedia.org/wiki/Substantia_innominata

    The substantia innominata, also innominate substance or substantia innominata of Meynert (Latin for unnamed substance), is a series of layers in the human brain consisting partly of gray and partly of white matter, which lies below the anterior part of the thalamus and lentiform nucleus.

  6. Neuroscience and intelligence - Wikipedia

    en.wikipedia.org/wiki/Neuroscience_and_intelligence

    Similar to grey matter, white matter has been shown to correlate positively with intelligence in humans. [1] [4] White matter consists mainly of myelinated neuronal axons, responsible for delivering signals between neurons. The pinkish-white color of white matter is actually a result of these myelin sheaths that electrically insulate neurons ...

  7. White matter in superagers' brains is less prone to aging and ...

    www.aol.com/white-matter-superagers-brains-less...

    Researchers analyzing the white matter of superagers over a 5-year period found that despite comparable overall white matter health with typical older adults, superagers exhibited superior ...

  8. Cerebral hemisphere - Wikipedia

    en.wikipedia.org/wiki/Cerebral_hemisphere

    The brain can thus be described as being divided into left and right cerebral hemispheres. Each of these hemispheres has an outer layer of grey matter, the cerebral cortex, that is supported by an inner layer of white matter. In eutherian (placental) mammals, the hemispheres are linked by the corpus callosum, a very large bundle of nerve fibers.

  9. Brain morphometry - Wikipedia

    en.wikipedia.org/wiki/Brain_morphometry

    This allows researchers to quantify anatomical features of the brain in terms of shape, mass, volume (e.g. of the hippocampus, or of the primary versus secondary visual cortex), and to derive more specific information, such as the encephalization quotient, grey matter density and white matter connectivity, gyrification, cortical thickness, or ...