parietal lobe seizure primary sensory area (post-central gyrus) seizure true Seizures onset with contralateral (or rarely ipsilateral or bilateral) focal somatosensory seizure, most commonly paraesthesias with tingling and/or numbness. There may be prickling, tickling, crawling or electric-shock sensations in the affected body part. The sensory abnormality may spread sequentially along a body part as the seizure spreads on the cortex according to the sensory homunculus (Jacksonian march), when this occurs motor activity in the affected body part commonly follows. Less common sensory features include pain and thermal perceptions (such as sensations of burning or cold).