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Grey matter, or brain matter in American English, is a major component of the central nervous system, consisting of neuronal cell bodies, neuropil (dendrites and unmyelinated axons), glial cells (astrocytes and oligodendrocytes), synapses, and capillaries.
White matter and grey matter are both essential parts of your brain and spinal cord. Approximately 40% of your brain consists of grey matter and 60% is made of white matter. Grey matter consists of neuronal cell bodies and their dendrites.
The central nervous system is composed of white matter and grey matter. Grey matter, which makes up about half of the brain, consists primarily of neuronal cell bodies, dendrites, and unmyelinated axons.
Grey matter makes up the outer most layer of the brain. The white matter and grey matter are similar as they are both essential sections of both the brain as well as the spinal cord. The grey matter gets its grey tone from a high concentration of neuronal cell bodies.
Learn how gray and white matter in the central nervous system differ in their location and function, as well as how various diseases affect both.
Gray Matter: How we process information
Grey matter plays a significant role when it comes to how our mind and body function. It allows people to control their motor movements and it allows us to receive sensory signals from our environment. Grey matter also plays important cognitive and mental health roles.
Gray matter contains most of the brain’s neuronal cell bodies. 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 cerebral cortex, also referred to as gray matter, covers the cerebrum, which is the largest portion of the brain. The cerebral cortex is responsible for integrating sensory impulses, directing motor activity, and controlling higher intellectual functions.
The central nervous system is made up of grey matter and white matter. Gray matter: named for its pinkish-gray color, is home to neural cell bodies, axon terminals, and dendrites, as well as all nerve synapses. This brain tissue is abundant in the cerebellum, cerebrum, and brain stem.