kanamycin: antibiotic (trade name Kantrex) used to treat severe infections
antibiotic: a chemical substance derivable from a mold or bacterium that can kill microorganisms and cure bacterial infections
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