Classical migraine
Alternative names:
Migraine (classical); migraine headache, migraine with aura
Definition:
A disorder involving repeated or recurrent headache, associated
with temporary changes in the diameter of the blood vessels
in the head. "Classic" migraine headaches refer to those migraine
headaches that are preceded by a visual disturbance called
an aura. This type of migraine is to be differentiated from
"common" migraines (no warning or aura) or "complicated" migraines
(associated with non-visual neurological symptoms such as
disturbances in speech, movement, or sensory perception).
Causes, incidence, and risk factors:
Headaches are a frequent cause of lost productivity and
a common reason for seeking medical attention. Migraines are
a common type of chronic headache, affecting about 6 out of
100 people. Migraines most commonly occur in women with onset
between the ages of 10 and 46 years. They appear to run in
families in some cases. Classical migraine accounts for about
one-sixth of all migraines. Common migraine and other (rare)
forms account for the rest.
The symptoms of migraine may occur as a result of changes
in blood vessel diameter. Initially, constriction or spasm
of blood vessels to the brain and surrounding structures may
decrease blood flow to these areas. This can result in neurological
symptoms other than headache, including visual changes, difficulty
speaking, weakness or numbness of one part of the body, tingling
sensations, and others. Many patients with migraine become
accustomed to these symptoms prior to a headache (called an
aura) and may take measures to reduce the severity of the
subsequent headache (see treatment). Minutes to hours later,
the blood vessels dilate (enlarge), resulting in the severe
headache. Classical migraine specifically refers to those
migraines preceded by visual symptoms.
Migraines have a multifactorial etiology. There are clear
hereditary factors and environmental triggers contributing
to a cascade of events causing abnormal blood vessel caliber
and inflammation and resulting in the ensuing symptoms. Attacks
of migraine headache may be associated with allergic reactions,
bright lights, loud noises, physical or mental stress, changes
in sleep patterns, smoking or exposure to tobacco smoke, missed
meals, alcohol, caffeine, hormonal fluctuations (related to
menstrual cycles or use of birth control pills), and other
conditions. Foods associated with migraine include foods containing
the amino acid tyramine (red wine, aged cheese, smoked fish,
chicken livers, figs, some beans), chocolates, nuts, peanut
butter, fruits (avocado, banana, citrus fruit), onions, dairy
products, baked goods, meats containing nitrates (bacon, hot
dogs, salami, cured meats), foods containing monosodium glutamate
("MSG" - an additive in many foods), and any processed, fermented,
pickled, or marinated foods.
Update Date: 05/08/00
Joseph Campellone, M.D., Assistant Professor of Neurology
(Department of Medicine) Robert Wood Johnson Medical School,
New Jersey. Director, Neurophysiology Laboratory, Cooper Hospital.VeriMed
Healthcare Network
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