extrapyramidal /ek′strəpiram″ədəl/ [L, extra + Gk, pyramis, pyramid] , 1. pertaining to the tissues and structures outside the cerebrospinal pyramidal tracts of the brain that are associated with movement of the body, excluding motor neurons, the motor cortex, and the corticospinal and corticobulbar tracts. 2. pertaining to the function of these tissues and structures.
