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White Matter


STRUCTURE

White matter is made up of axons (nerve fibers) that connect various regions of the brain (grey matter). The axons are myelinated, i.e. they have a wrapping of myelin sheath around it.

The white matter in brain is on the inner side and grey matter on the outer side. It is the other way around in the spinal cord with the grey matter on the inner aspect and white matter on the outer side.

 

FUNCTIONS

Using computer network as an analogy, we can say that if the computers are grey matters then the cables connecting these computers are the white matters. White matter works in the same fashion and transmits information between different regions of the nervous system as the cables in a computer network.

 

CLINICAL IMPORTANCE

The inflammation of the myelin sheath of axons cause a disease called Multiple Sclerosis. It is the most common disease of the white matter.

Changes in the white matter also cause other neurodegenerative diseases like Alzheimer’s disease. Injuries to the white matter are usually reversible.

 



STRUCTURE

White matter is made up of axons (nerve fibers) that connect various regions of the brain (grey matter). The axons are myelinated, i.e. they have a wrapping of myelin sheath around it.

The white matter in brain is on the inner side and grey matter on the outer side. It is the other way around in the spinal cord with the grey matter on the inner aspect and white matter on the outer side.

 

FUNCTIONS

Using computer network as an analogy, we can say that if the computers are grey matters then the cables connecting these computers are the white matters. White matter works in the same fashion and transmits information between different regions of the nervous system as the cables in a computer network.

 

CLINICAL IMPORTANCE

The inflammation of the myelin sheath of axons cause a disease called Multiple Sclerosis. It is the most common disease of the white matter.

Changes in the white matter also cause other neurodegenerative diseases like Alzheimer’s disease. Injuries to the white matter are usually reversible.

 

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