grey matter


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gray mat·'ter

[TA]
those regions of the brain and spinal cord that are made up primarily of the cell bodies and dendrites of nerve cells rather than myelinated axons.
Nonmyelinated cells and circuitry that comprise the ‘central processing unit’ of the CNS and spinal cord; the thinking part of the brain, which is composed of neuronal cell bodies, initial axon segments, dendritic processes, and arborizations, glia—neuroglial cells—capillaries and vascular support; gray matter is so named because it appears grayish; brain gray matter is peripheral; spinal cord gray matter is central

grey matter

That part of the CENTRAL NERVOUS SYSTEM consisting mainly of nerve cell bodies. The grey matter of the brain includes the outer layer (the cortex) and a number of centrally placed masses called nuclei. In the spinal cord, the grey matter occupies the central axis. The white matter consists of nerve fibres—axons of the nerve cells.

grey matter

the material from the CENTRAL NERVOUS SYSTEM of vertebrates containing the nerve cell bodies which give the material a grey colour as distinct from the white colour of the FIBRES (compare WHITE MATTER). Grey matter also contains the DENDRITES of the nerve cells (with no myelin sheath), blood vessels, and glial cells which have a supportive function. Grey matter of the spinal cord is internally arranged in the form of an ‘H’ shape in cross-section, unlike the brain, where grey matter is external. Coordination occurs in the grey matter of the CNS.
References in periodicals archive ?
Patients across all age groups treated with ozanimod lost less cortical grey matter volume than did those treated with interferon beta-1a over 24 months, including patients in the 18 to 25 age group.
The study found that 1,291 people who had a BMI of 30 or higher and a high waist-to-hip ratio had the lowest average grey matter volume, at 786 cubic centimetres; 514 people with a BMI of 30 or higher but without central obesity had an average grey matter volume of 793 cubic centimetres.
Neuro-cognition and grey matter volume: correlation analyses based on voxels were conducted on the imaging data and scores of neuro-cognition tests in the patient group with age, gender and education level as covariates.
Grey Matter Platform's business intelligence and predictive data analytics complements Saviance Technologies' vision of simplifying healthcare by creating easy to use digital solutions for clients and creating better patient experiences, Saviance said.
Grey matter is considered a marker for neurological disorders that can occur over time, including mild cognitive impairment and Alzheimer's.
The neuroimaging studies about the neurobiology of schizophrenia have focused on brain connectivity, brain function, and changes in grey matter volumes (3).
Brain structural abnormalities in obsessive-compulsive disorder: Converging evidence from white matter and grey matter. Asian Journal of Psychiatry, 5(4), 290-296.
I always thought that the bright thinkers of the world required more grey matter not less.
The researchers used voxel-based morphometry (VBM) to examine the extent to which grey matter density in 176 participants predicted their scores on tests that rated their levels for cognitive empathy compared to affective -- or emotional -- empathy.
Results: A strong linear correlation (R2=0.99, p = 0.05) was found between the susceptibilities of Deep Grey Matter (DGM) at low resolution versus high resolution which showed the consistency of susceptibility at both resolution.
The film Grey Matter reflects on the suffering of those who as children survived the Rwandan genocide.
Segmentation techniques on the other hand allow quantification of total or regional gray matter, cortical gray matter, and deep grey matter volumes.