Tonic-Clonic Seizure

**Semantic type:** Finding

**Definition:** A generalized seizure that is characterized by a loss of consciousness and violent muscle contractions. This type of seizure may be preceded by an aura and is frequently followed by a period of confusion and lethargy (post-ictal state).

**Synonyms:** - Generalized Tonic-Clonic Seizure - Grand Mal - Grand Mal Seizure - Grand-Mal Seizure