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

1.
weiße Substanz
the paler tissue of the brain and spinal cord, consisting mainly of nerve fibers with their myelin sheaths.
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Damage to the white matter can impair cognitive function.
Schäden an der weißen Substanz können die kognitive Funktion beeinträchtigen.
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The MRI scan revealed abnormalities in the patient's white matter.
Der MRT-Scan zeigte Anomalien in der weißen Substanz des Patienten.