Seizure vs. Stroke: Key Differences in Causes, Symptoms, and Treatment

Seizure

Cause: Sudden, abnormal electrical activity in the brain.

Common Symptoms:

• Loss of consciousness
• Convulsions/jerking movements
• Stiffening
• Confusion, memory gaps

Triggers: Epilepsy, head injury, stroke, brain tumor, infection, drugs, electrolyte imbalance.

Stroke

Cause: Interruption of blood flow to the brain (ischemic stroke) or bleeding (hemorrhagic stroke).

Common Symptoms (FAST):

• Face drooping
• Arm weakness
• Speech difficulty
• Time to call emergency services
• Also: sudden confusion, vision loss, dizziness, severe headache

Risk Factors: Hypertension, diabetes, atrial fibrillation, smoking, obesity, inactivity.

Comparison Table

Feature	Seizure	Stroke
Mechanism	Electrical disturbance	Vascular interruption
Onset	Sudden, often brief	Sudden, persistent
Motor Symptoms	Bilateral, rhythmic	Unilateral weakness
Consciousness	Often impaired	May be preserved
Treatment	Antiseizure meds, surgery	Thrombolytics, thrombectomy, rehab

Critical Action

Both are medical emergencies. Call 911 immediately. Do not restrain a seizure; protect from injury. For stroke, note time of onset—treatment windows are narrow.