Which of the following best describes the primary symptom of trigeminal neuralgia (tic douloureux)?

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Loss of muscle movement on one half of the faceInvoluntary muscle spasmsIntense, stabbing pain lasting brieflyExtended periods of facial pain on one side

Explanation

Trigeminal neuralgia is known for causing sudden, severe, and brief episodes of sharp facial pain. It is not associated with facial paralysis or muscle twitching, nor does the pain typically last for prolonged periods.