(n)epilepsy in which the attacks begins with an isolated disturbance of cerebral function (as a twitching of a limb or an illusory sensation or a mental disturbance), Syn.focal epilepsy
a. [ L. cortex bark: cf. F. cortical. ] Belonging to, or consisting of, bark or rind; resembling bark or rind; external; outer; superficial; as, the cortical substance of the kidney. [ 1913 Webster ]