Table 1:

International Headache Society guidelines for classification of migraines and definition of migraine aura18

Definition of migraine

At least 5 attacks fulfilling the following criteria:

1) Headache lasting 4–72 hr

2) Headache with at least 2 of the following characteristics:

Unilateral location

Pulsating quality

Moderate or severe pain intensity

Aggravation by or causing avoidance of routine physical activity

3) During the headache, at least 1 of the following:

Nausea and/or vomiting

Photophobia or phonophobia

4) Not attributed to another disorder

Definition of aura

At least 1 of the following, but no motor weakness:

1) Fully reversible visual symptoms, including positive features (eg, flickering lights) and/or negative features (ie, loss of vision)

2) Fully reversible sensory symptoms, including positive features (ie, pins and needles) and/or negative features (ie, numbness)

3) Fully reversible dysphasic speech disturbance