30th April 2024

A 30-year-old man presents with a history of recurrent episodes of loss of consciousness followed by jerking movements of the limbs.

A 30-year-old man presents with a history of recurrent episodes of loss of consciousness followed by jerking movements of the limbs. These episodes are often preceded by a sensation of déjà vu. He has no significant past medical or family history. Physical and neurological examinations are normal.

Which investigation is most likely to confirm the diagnosis?