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RECOGNITION OF MIGRAINE AND TENSION-TYPE HEADACHES |
Migraine
Migraine is one of the most common types of headache, with an estimated
prevalence of 20% in women and 6% in men. Migraine occurs at all ages, often
beginning as teenager or young adult. Up to 90% have a family history of
migraine.
Criteria for Migraine by the International Headache
Society
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Episodic attacks of headache lasting 4-72 hours
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With two of the following symptoms:
Unilateral pain
Throbbing
Aggravation on movement
Pain of moderate or severe
intensity
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And one of the following symptoms:
Nausea or vomiting
Photophobia or phonophobia |
Migraine is divided into those without a neurologic prodrome (a.k.a.,
common migraine or
migraine without aura) and those that are accompanied by transient
focal neurological symptoms (aura) before the headache (a.k.a.,
classic migraine or
migraine with aura). The headache phase is similar in the two groups.
Migraines are severe headaches associated with nausea and vomiting that usually
put the person to bed (in past generations known as “sick headaches”). Once the
full-blown headache is reached, patients appear very similar clinically to
patients with a subarachnoid hemorrhage (i.e., severe headache, nausea and
vomiting, curled up in bed in a dark room). However, compared to the temporal
course of subarachnoid hemorrhage which is explosive, the pain of a migraine
tends to “build up” over 30 minutes to hours. Migraine often affects one side of
the head (hemicranial pain), although it can
be global, frontal or occipital in different patients. Likewise, the quality of
migraine pain is most often throbbing; however, some patients describe a
constant pain. |
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Above: example of an aura of scintillating
scotoma (different images represent the build-up of the aura over 20 minutes) |
In classic migraine, patients experience a transient focal neurologic
symptom before the headache. These auras are most often visual, followed by
sensory, motor or language disturbances. The most
common aura is a scintillating scotoma. These are typically zigzag,
shimmering or colored lines in one visual field that enlarge over 10 - 20
minutes. This "build-up" of symptoms over
10- 20 minutes is characteristic of migraine (much longer than would occur in a
seizure). Also, of importance, migraine visual symptoms tend to be
“positive.” The lines are bright or shimmering,
as opposed to dark or absent vision (i.e., negative symptoms). However,
following the scintillating scotoma, the visual disturbance may change to a loss
of vision. Visual auras are thought to originate from the calcarine cortex. Next
common are transient sensory symptoms, usually paresthesias (again, positive in
nature, as opposed to numbness or lack of sensation) that slowly spread from one
body segment to another. Similar to a visual aura, sensory auras build up over
10 - 20 minutes and then slowly resolve (often as the headache is beginning). In
some patients, transient language of motor dysfunction occurs as part of an
aura. One of the defining characteristics of migraine with aura is the presence
of a “march.” In a migraine march, the
visual aura comes first, followed by a sensory aura, followed by a motor or
language disturbance.
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Tension-Type Headaches
Everyone has experienced tension-type headaches. There are
characterized as bilateral pain, most prominent in the occiput and frontal
regions, and described as "band-like" or tight. These headaches tend to grow
worse as the day progresses. Most are associated with stress, eyestrain, poor
sleep, as well as neck and scalp muscle tightness.
Diagnostic criteria include:
• Headache lasting 30 min to a week
• Absence of any transient neurologic symptoms
• Absence of nausea or vomiting
• Absence of photophobia and phonophobia
• At least two of the following
Pressing or tightening quality
(non-pulsating)
Mild or moderate intensity
Bilateral location
No aggravation by physical
activity
Tension-type headaches have often been thought to originate from scalp
muscles, although it is unproven if muscle tension actually plays a role. |
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