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REVIEW
OF LITERATURE:
1.Defination
Migraine is a complex neurological disorder characterized by periodic headaches,
typically unilateral, often associated with visual disturbance and vomiting. (1)
2.Classification
·
Classical migraine – Visual or sensory
symptoms precede or accompany
the headache.
·
Common migraine – No Visual or sensory
features
Headache,
nausea, vomiting and photophobia occur
·
Basilar migraine – Occipital headache,
preceded by vertigo, diplopia, dysarthria (Slurred speech), hyperacusis
(impaired hearing), visual and sensory symptoms (Brain-stem symptoms), muscle
weakness is not part of basilar migraine.
·
Hemiplegic migraine – Prolonged headache
lasting hours or days
Headache
is followed by contralateral hemiparesis or hemiplegia; patient may have
several attacks affecting one side of
the body, whereas the next attacks may affect the opposite side.
·
Retinal migraine – Loss of vision limited to
one eye.
·
Typical aura without headache – Presence of
migraine aura without headache (visual aura most common) (1)
3.Pathogenesis
Exact mechanism is unknown; it is the
consensus that an attack of migraine consists of a neuromuscular disorder of
the intracranial as well as extra cranial vessels. Sequential studies of
cerebral blood flow show an initial reduction, which may be localized or
generalized followed by increases in blood flow later. The basic cause of
these circulatory disturbances is unknown. it is found that blood levels of
serotonin, histamine and norepinephrine increases during the attacks. There
is also an increase in platelet aggregability. This may account for strokes,
which complicates migraine. The headache has been attributed to extreme
pulsation of extracranial as well as. intracranial arteries.
There is now good evidence that in
classical migraine there is extreme cerebral oligemia at the onset of the
attack. This is often occipital in site but may spread to the parietal and
temporal lobes. Oligemia may be secondary to some primary cortical
dysfunction, since attack can be set off by neural stimuli like bright light
or strong odors. Others believe that vasospasm is responsible for the initial
dysfunction.
During headache phase there is
dilatation and edema of the extra cranial arteries and probably some
alteration in pain sensitivity in their walls. These vascular changes may be
due to fluctuation in blood 5 hydroxy tryptamine levels.
There is a genetic predisposition.
Approximately three†quarters of patients who suffer from migraine have close
relatives similarly affected.
Migrainious attacks may be precipitated
by a variety of factors such as menstruation, flashing lights, stress and
anxiety. Cheese, chocolate and red wine are all common precipitants and are
all rich in tyramine, experimental ingestion of which will often provoke an
attack. Reserpine, which liberates 5 hydroxy tryptamines in brain also, can
cause migraine. (2)
4.Clinical Features
The attacks are episodic and start at
puberty and continue till late middle life with variable degree of
spontaneous remissions. Frequency, duration and severity of attacks may vary
in the same individual.
The
sign & symptoms of migraine vary among patients.
The four ‘sign & symptoms’ below
are common among patients but are not necessarily experienced by all migraine
sufferers:
·
The Prodrome (An early symptom indicating the
onset of disease or illness, which occurs hours or days before the headache)
·
The Aura which immediately precedes the
headache
·
The Headache Phase
·
The Postdrome (Migraine Hangover)
·
First Phase or Prodrome:
Prodromal symptoms occur in 40-60% of migraineurs.
This Phase consists of:
· Altered
Mood
· Depression
or Euphoria (A feeling or state of intense excitement & Happiness)
· Fatigue
· Yawning
· Excessive
Sleepiness
· Craving
for certain food (E.g., Chocolate)
These symptoms usually precede the headache
phase of migraine attack by several hours or days and experience teach the
family observant or patient that the migraine attack is near.
· Second
Phase or Aura:
The Migraine aura is comprised of ‘Focal Neurological Phenomena’ that
precedes or accompany the attack.
They appear gradually over 5 to 20 minutes & usually subside just
before the headache begins.
Symptoms of migraine aura are usually ‘Sensory’ in nature. (perceived
by senses)
At first this aura may take the form of some ‘Visual Disturbances’
e.g., Photophobia, Cloudy vision, Lachrymation, ocular pain etc.
The Somatosensory aura of migraine consist of Digitolingual
Paresthesia (Always Unilateral) A feeling of pins & needle experience in
hand and arm.
· Third
Phase or The Headache:
The typical migraine headache is
unilateral, throbbing and moderate to severe and can be aggravated by
physical activity.
The pain may be bilateral at the
onset or start on one side and become
generalized,
usually alternates sides from one attack to the next.
The onset is gradual. The pain peaks
and then subsides, and usually lasts between 4 to 72 hours in adults and 1 to
48 hours in children.
The frequency of attack is extremely
variable, from a few in a lifetime to several times a week, the average
migraine experiences from one to three headaches a month.
The pain of migraine is invariably
accompanied by other features:
Anorexia is common and Nausea occurs in
almost 90 % of the patients;
While
vomiting occurs in 1/3rd of patient.
Many patients experience sensory
hyperexcitability manifested by photophobia (abnormal sensitivity to light,
especially of the eyes), phonophobia (a persistent, abnormal and unwarranted
fear of sound),
osmophobia
(fear, dislike or aversion to smell or odors) and seek a dark and quiet room.
Blurred vision, nasal stiffness,
diarrhea, polyuria, pallor or sweating may be noted during the headache
phase.
A feeling of faintness may occur,
the extremities tend to be cold and moist.
·
Fourth Phase or The Postdrome Phase:
The patient may feel tired, ‘washed out’,
irritable, listless and may have impaired concentration and mood changes.
Some people feel unusually refreshed or
euphoric after an attack whereas others note depression and malaise. (3) (4)
5.Diagnostic
Criteria
· Common Migraine
· Repeated attacks (at least five attacks) of headache
lasting 4-72 hours that have the following features:
· Normal physical examination.
· No other reasonable cause for the headache
· Headache has at least two of the following:
Unilateral pain
Throbbing or
pulsatile pain
Aggravation of
pain by movement
Moderate or
severe intensity of pain
· At least one of the following during headache:
Nausea or
vomiting
Photophobia and
phonophobia
· Classical Migraine
- Repeated attacks
(at least two attacks) of headache lasting 4-72 hours that have the following
features:
- Normal physical
examination.
- No other
reasonable cause for the headache.
- Aura consisting of
at least one of the following, but no motor weakness;
Fully
reversible visual symptoms including positive features (e.g. flickering
lights, spots or lines) and/or negative features (e.g. loss of vision)
Fully
reversible sensory symptoms including positive features (e.g. pins and
needles) and/or negative features (e.g. numbness)
Fully
reversible dysphagic speech disturbance
- At least two of
the following:
Homonymous
visual symptoms and/or unilateral sensory symptoms.
At least
one aura symptoms developing gradually over > 5 minutes and/or different
aura symptoms occurring in succession over > 5 minutes.
Each
symptom lasting >5 and <60 minutes
Headache begins during aura or follows aura within 60
minutes. (1)
6.Differntial
Diagnosis (4)
·
Cluster Headache
·
Tension Type Headache
·
Medicine Overuse Headache
·
Viral Meningitis
·
Cerebral Aneurysms
·
Chronic Paroxysmal Hemicrania
·
Intracranial Haemorrhage
·
Encephalitis
7.Complication
· Status migrainosus is a debilitating migraine attack that
lasts more than 72 hours.
· Migrainious infarction is one or more aura symptoms
associated with brain ischemia.
· Persistent aura without infarction is an aura that persists
for more than one week without evidence of infarction.
· Migraine aura – triggered seizure occurs during an attack
of migraine with aura, and a seizure is triggered. (4)
8.Treatment:
· Avoidance of identified triggers or exacerbating factors
(such as the combined contraceptive pill) may prevent attacks.
· Treatment of an acute attack consists of simple analgesia
with aspirin, paracetamol or non-steroidal anti-inflammatory agents.
· Nausea may require an antiemetic such as metoclopramide or
domperidone.
· Severe attacks can be aborted by one of the ‘triptans’
(e.g. sumatriptan), which are potent 5-hydroxytryptamine (5-HT, serotonin)
agonists. These can be administered via the oral, subcutaneous or nasal
route.
· Caution is needed with ergotamine preparations because they
may lead to dependence.
· Overuse of any analgesia, including triptans, may
contribute to medication overuse headache.
· If attacks are frequent (more than
two per month), prophylaxis should be considered. Many drugs can be chosen
but the most frequently used are
vasoactive drugs (β-blockers, candesartan, lisinopril), antidepressants
(amitriptyline, dosulepin) and antiepileptic drugs (topiramate). Monoclonal antibodies to
calcitonin gene-related peptide
receptor are available for refractory migraine.
· Women with aura should avoid oestrogen treatment for either
oral contraception or hormone replacement, although the increased risk of ischemic
stroke is minimal. (5)
Hahnemannian
concept of one-sided disease
Chronic diseases which are having too few symptoms are called one
sided disease. The availability of symptoms are less in number in such
diseases, as a result construction of totality becomes very difficult. Hence,
they are difficult to cure (§ 172-173). (6)
- Types
of One-Sided Diseases (§ 174) (6)
Depending upon the principle symptom
exhibited by the patient, one-sided diseases are classified into 2 types:
· One-sided
disease with internal complaint
· One-sided
diseases with external complaint
o
One-sided disease with internal complaint:
These
group of diseases exhibit more of the internal symptoms that are mostly
affecting the internal parts of the body. They are of again two types:
o
Diseases with physical symptoms:
Example: Chronic
Headache, diarrhea of long standing, an old cardialgia etc.
o
Diseases with mental symptoms Example: mania,
insanity etc.
- Treatment
of One-Sided Diseases:
Sometimes it seems that treating
one-sided diseases is difficult as the symptoms are not sufficiently present.
The portrait of the disease is not sketched properly (§ 175).
But careful case taking &
examination will reveal one or two severe and important symptoms that are
present in the case (§ 176).
Based on these available symptoms,
the physician has to select the seemingly indicated remedy which he thinks
best suitable (§ 177).
Such selection is, if based on the
very striking, decided, uncommon and peculiar, distinctive symptoms of the
patient, the selected remedy sometimes cures the given case (§ 178).
But frequently owing to the
scarcity of symptoms, the chosen remedy may not exactly cover the totality of
the given case. When such imperfect homeopathic remedy is administered,
patient complains of appearance of new symptoms which he never experienced
before. These symptoms are nothing but the "accessory symptoms of the
medicine". This should not be considered as a bad prognosis. The whole
collection of the existing symptoms has to be considered as the disease
picture itself (§ 180-181).
By considering the accessory
symptoms of the medicine as the disease symptoms, the physician gets more
number of symptoms of the disease. Thus, the totality of the symptoms of the
disease is accurately sketched with the help of accessory symptoms of the
medicine. Hahnemann in § 182 says, “the
imperfect selection of the medicament, which was in this case almost
inevitable owing limited number of symptoms present, serves to complete the
display of the symptoms of the disease.â€
Now based on the symptoms of the
disease and the newly developed accessory symptoms of medicine, we can
prescribe a new yet well-chosen homeopathic remedy.
Existing symptoms of Disease +
Accessory symptoms of Medicine = Present totality of symptoms
In the footnote to aphorism no.
181, Hahnemann warns that before considering the accessory symptoms of
medicine as the totality, the physician has to clarify that the accessory
symptoms are not produced due to any error in diet and regimen or due to some
menstrual irregularities, conception and child birth etc. It has to be
confirmed that the new symptoms are due to administered medicine only.
When the previously administered remedy
completes its action, the present symptomatology and the state of the disease
remaining (status morbi) has to be enquired thoroughly. Based on this current
totality, a new homeopathic remedy has to be selected and administered again
(§ 182-183).
Sometimes it happens that even
when the patient is ill and suffering the symptomatology may not be
sufficiently clear and distinctive. In such condition administration of
"Opium" will help to clear the paucity of symptoms. Opium, in its
secondary action makes the patient’s
pain and suffering clearer and more perceivable to the physician (footnote to
§ 183).
In this way, based on the existing
and remaining totality several remedies can be administered one after another
in succession. Each prescription has to be done only after the pervious one
has completed its action. The same method can be practiced until the recovery
is complete and the patient gets cured. (7)
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