marburg disease: a viral disease of green monkeys caused by the Marburg virus; when transmitted to humans it causes serious or fatal illness
ill health: a state in which you are unable to function normally and without pain
pyramidal tract: any of the important motor nerves on each side of the central nervous system that run from the sensorimotor areas of the cortex through the brainstem to motor neurons of the cranial nerve nuclei and the ventral root of the spinal cord