Giant somatosensory spikes evoked by tapping in a girl with EEG centrotemporal spikes but not epileptic seizures

Tapping of the finger, either by the examiner or the patient, consistently evoked giant somatosensory spikes localized in the contralateral sensorimotor brain regions. (Used with permission from: Panayiotopoulos CP, editor. A practical guide to childhood epilepsies. Oxford: Medicinae, 2006.)