the brain consists of grey and white matter. it weighs just over a kilo. it uses

What is the GREY and white matter in the brain?

Grey matter is distinguished from white matter in that it contains numerous cell bodies and relatively few myelinated axons, while white matter contains relatively few cell bodies and is composed chiefly of long-range myelinated axons. The colour difference arises mainly from the whiteness of myelin.

What is the GREY matter in the brain?

The grey matter is mainly composed of neuronal cell bodies and unmyelinated axons. ... The grey matter serves to process information in the brain. Structures within the grey matter process signals generated in the sensory organs or other areas of the grey matter.

What is the function of GREY and white matter?

The grey matter also extends from the brain into the spinal cord. The grey matter creates a hornlike structure throughout the inside of the spinal cord while the white matter makes up the surrounding sections of the spinal cord. The grey matter does extend to the spinal cord to make signaling more effective.

What is the weight of human brain in KG?

The adult human brain weighs on average about 1.5 kg (3.3 lb). In men the average weight is about 1370 g and in women about 1200 g.

What is the difference between GREY and white matter?

What is the difference between grey and white matter in the brain? ... The grey matter contains the cell bodies, dendrites and the axon terminals, where all synapses are. The white matter is made up of axons, which connect different parts of grey matter to each other.

What is GREY matter disease?

"Gray matter disease causes progressive symptoms, like fatigue and memory loss. These higher brain functions are called cognitive functions. Most MS disability actually comes from cognitive dysfunction."

Is gray matter good or bad?

The gray matter changes occurred in the hippocampus, the part of the brain believed to be central to memory. It is “a structure important for healthy cognition across people's lifespan,” the study says, and is “centrally involved in many functions including spatial navigation, episodic memory and stress regulation.”

What increases GREY matter in the brain?

In a new study out of the German Center for Neurodegenerative Diseases, researchers found that people who actively took part in cardiorespiratory exercise — like walking, running, hiking or biking — showed improved brain health, particularly when it came to brain volume and grey matter.

Does GREY matter grow back?

Grey matter is made up of cell bodies and dendrites, while white matter is the fibre tracts - bundles of axons wrapped in myelin - that allow different areas of the brain to communicate. Grey matter cannot really regrow at all. ... It can grow through the thickening of the myelin layers.

What is the function of white matter related to memory?

White matter is made up of the neuronal axons that connect neurons in the "gray matter" brain regions. White matter also helps the regions of the brain to communicate with one another. "Historically, a lot of people have put their eggs in the gray matter basket.

What is the role of white matter?

White matter is found in the deeper tissues of the brain (subcortical). ... Myelin gives the white matter its color. It also protects the nerve fibers from injury. Also, it improves the speed and transmission of electrical nerve signals along extensions of the nerve cells called axons.

What is the importance of white matter?

The white matter is white because of the fatty substance (myelin) that surrounds the nerve fibers (axons). This myelin is found in almost all long nerve fibers, and acts as an electrical insulation. This is important because it allows the messages to pass quickly from place to place.

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