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Answer: Ischemic white matter disease refers to small blood vessels in the brain that are clogging up a bit. This is usually not a serious condition unless the amount of small vessel disease gets to a moderate or severe degree.It is often caused by high blood pressure, diabetes, high cholesterol, or smoking.nswer: Ischemic white matter disease refers to small blood vessels in the brain that are clogging up a bit. This is usually not a serious condition unless the amount of small vessel disease gets to a moderate or severe degree.
The brain contains both gray matter and white matter. The gray matter is made up up of the neurons that have non-myelinated axons. The white matter is made up of neurons that have myleniated axons.The myelin sheath is white.The primary thinking, perceiving and cognitive functions of the brain happen on in the gray matter of the brain.he gray matter is made up up of the neurons that have non-myelinated axons. The white matter is made up of neurons that have myleniated axons. The myelin sheath is white. The primary thinking, perceiving and cognitive functions of the brain happen on in the gray matter of the brain.