Introduction 2) White matter白质 collection of nerve fibers, white color during fresh condition Medu|a髓质 a central core of white matter beneath cortex of cerebrum and cerebellum Fasciculus纤维束( tract) a bundle of nerve fibers Which have the same origin termination, and function2) White matter白质: collection of nerve fibers, white color during fresh condition Introduction a central core of white matter beneath cortex of cerebrum and cerebellum a bundle of nerve fibers which have the same origin, termination, and function Medulla 髓质: Fasciculus 纤维束 ( tract ):