Epilepsia partialis continua is often refractory to antiepileptic medication and its causal relation to peripheral sensory stimuli has only rarely been suggested. We report a man who received surgery for temporal lobe epilepsy 10 years ago, who presented "de novo" epilepsia partialis continua following mild traumatic injury of the left hand. Continuous myoclonus of the left upper limb started the day after injury and persisted unabated for several weeks. Non-invasive evaluation was inconclusive. Acute electrocorticography during surgery under local anaesthesia revealed continuous, rhythmic spiking over the right sensorimotor cortex. Tailored excision of the posterior bank of the motor and adjacent sensory cortex immediately stopped the continuous myoclonus. Histopathology showed abnormal radial lamination and was compatible with focal cortical dysplasia type IA. Epilepsia partialis continua did not recur for seven years. Afferent stimuli from peripheral injury can disinhibit hyperexcitable sensorimotor cortex leading to epilepsia partialis continua. [Published with video sequences online].
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