Table 1

Negative symptoms of epilepsy

Symptom Diagnosis Distinguishing characteristics
BlindnessOccipital epilepsyOccurs in 25% of occipital seizures, usually other epileptic features such as motor activity or altered awareness
Focal paresisSensorimotor epilepsyMay rarely occur without preceding clonic jerks in sensorimotor cortex epilepsy
Sudden, brief and focal loss of toneNegative myoclonusSeen in epileptic and non-epileptic causes of cortical myoclonus
AmnesiaTemporal lobe epilepsyPure amnesia without other symptoms has been reported occasionally
DysphasiaFocal epilepsyOccasionally an isolated symptom of epilepsy and may be progressive in focal status epilepticus