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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:
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 ...
Many of the short association fibers (also called arcuate or "U"-fibers) lie in the superficial white matter immediately beneath the gray matter of the cerebral cortex, and connect together adjacent gyri. [2] Some pass from one wall of the sulcus to the other. [3]
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 ...
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 ...
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]
Decreased white matter integrity effects proper transmission and processing of sensorimotor information. White matter degeneration of the genu of the corpus callosum is also associated with gait, balance impairment, and the quality of postural control. [8]
Researchers have found that people who battled COVID-19 may have lasting damage to the gray matter and tissue of their The post Brain scans show tissue damage, loss of grey matter in COVID-19 ...