Attention deficit disorders

ADHD medication may affect brain development in children

A drug used to treat attention-deficit/hyperactivity disorder (ADHD) appears to affect the development of the brain's signal-carrying white matter in children with the disorder, according to a study published in the journal ...

Neuroscience

White matter hyperintensities in RCVS vary over time

(HealthDay)—White matter hyperintense lesions (WMHs) in patients with reversible cerebral vasoconstriction syndrome (RCVS) change over time in a manner that parallels disease severity, according to a study published online ...

Alzheimer's disease & dementia

White matter hyperintensities predate Alzheimer's onset

(HealthDay)—Autosomal dominant Alzheimer's disease is associated with increased white matter hyperintensities (WMH) on magnetic resonance imaging well before expected symptom onset, according to a study published online ...

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White matter

White matter is one of the two components of the central nervous system and consists mostly of myelinated axons. White matter tissue of the freshly cut brain appears pinkish white to the naked eye because of myelin is composed largely of lipid and a few percent of capillaries. Its white color is due to its usual preservation in formaldehyde. A 20 year-old male has around 176,000 km of myelinated axons in his brain.

The other main component of the brain is grey matter (actually pinkish tan due to blood capillaries). A third colored component found in the brain that appears darker due to higher levels of melanin in dopaminergic neurons than its nearby areas is the substantia nigra.

This text uses material from Wikipedia, licensed under CC BY-SA