What term describes sudden, transient disturbances in brain function due to abnormal firing of nerve impulses?

• A. Syncope
• B. Migraine
• C. Stroke
• D. Seizure

Answer: (D)

Seizure is the term for a sudden, brief disruption in brain function caused by abnormal electrical firing of neurons. These abnormal discharges can produce a wide range of fleeting symptoms—shaking or convulsions, staring spells, unusual sensory experiences, or transient changes in awareness or autonomic function—and then resolve as the brain returns to its normal activity.

This concept fits best because the key features are the abrupt start, the abnormal neuron firing, and the transient nature of the disturbance. Syncope describes fainting from a drop in brain blood flow and typically lacks a period of postictal confusion. Migraine involves headache with aura and neural symptoms but isn’t driven by widespread aberrant neuronal firing in the same way. Stroke is a vascular event causing lasting neurological deficits, not brief, isolated bursts of abnormal brain activity.