grey matter

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gray mat·'ter

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.

substantia grisea

; grey matter central nervous system regions containing little myelin and few/no myelinated axons; e.g. dorsal horn, ganglia, nerve cell bodies and dendrites
References in periodicals archive ?
MRI test results showed that only the participants in the video-game cohort saw increases in grey matter volume in the hippocampus and cerebellum, and their short-term memory was also improved, according to the study.
In this study, we aimed to present our imaging findings of 20 schizophrenia patients and 16 matched healthy participants and study the correlation of grey matter volume differences with clinical variables.
Specifically, patients with Parkinson's disease combined with dementia, as well as those with Alzheimer's disease, schizophrenia, depression or PTSD - all of whom have less grey matter in their hippocampus - "would not be advised to [follow] action video game treatments," according to the study.
Here it was again, the dreaded maths: if you are 200 runs ahead, and the pitch is taking spin, when do you declare taking in all circumstances like the speed of the outfield, the distance from batting crease to the boundaries, the strength of the opposing batting - here I was with my grey matter spinning hopelessly in a vacuum, even before I tried to estimate how many overs Glamorgan's bowlers would send down before close-of-play.
Relative to comparison subjects, individuals exposed to childhood maltreatment exhibited significantly smaller grey matter volumes: in the right orbitofrontal/superior temporal gyrus extending to the amygdala, insula, and parahippocampal and middle temporal gyri and in the left inferior frontal and postcentral gyri.
Brilliant Tutorials and Grey Matter Academics have organised a free seminar on "Shine in School/CBSE Exams and Succeed in IIT-JEE/AIEEE/Medical Entrance Exams" for parents and students of Classes VIII to XII on September 7, at 7pm at the Centre for Performing Arts, Al Khuwair in Muscat.
We also found that the longer the musicians had been playing the greater volume of the grey matter.
Grey matter is the name given to parts of the brain mainly composed of the tightly packed 'heads' of nerve cells.
We have found a link between smoking and thinner grey matter PROF IAN DEARY EDINBURGH UNIVERSITY
Essentially, it's a new brain-training game that looks to give you the ultimate grey matter workout, packed with a host of fun and stimulating mini-games and challenges, and filled with questions endorsed by Mensa, the renowned global high IQ society.
Digital security solutions provider Aladdin Knowledge Systems Ltd (Aladdin) has had its Privilege Software Commerce Platform chosen by technical and development software supplier Grey Matter Ltd.