Jacksonian epilepsy n epilepsy that is characterized by progressive spreading of the abnormal movements or sensations from a focus affecting a muscle group on one side of the body to adjacent muscles or by becoming generalized and that corresponds to the spread of epileptic activity in the motor cortex
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J. H. Jackson (1835-1911), British neurologist
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epilepsy characterized by focal motor seizures with unilateral clonic movements that start in one group of muscles and spread systematically to adjacent groups, reflecting the march of the epileptic activity through the motor cortex. The seizures are due to a discharging focus in the contralateral motor cortex; called also Bravais-jacksonian e.Medical dictionary. 2011.