white matter
US /ˈwaɪt ˌmæt.ər/
UK /ˈwaɪt ˌmæt.ər/

1.
substância branca
the paler tissue of the brain and spinal cord, consisting mainly of nerve fibers with their myelin sheaths.
:
•
Damage to the white matter can impair cognitive function.
Danos à substância branca podem prejudicar a função cognitiva.
•
The MRI scan revealed abnormalities in the patient's white matter.
A ressonância magnética revelou anormalidades na substância branca do paciente.