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#Migraines and #Depression articles.

Psychiatric Comorbidity in Chronic Daily Headache research states people who have chronic pain do not get as depressed as often as people with chronic migraines. So there must be a link or correlation to explain why this is so.

Migraine and psychiatric comorbidity: a review of clinical findings research points to the fact migraine with aura migraineurs are more likely to have depression than those without aura.

Migraine and depression The association with depression is high with migraine with aura and in chronic migraines. They suggest migraine patients are carefully screened for depression.

For more than a century, clinicians and researchers alike
have noted the possible relationship between migraine and
different psychological characteristics, including tenden-
cies toward depression, perfectionism and repressed
aggression. With few exceptions, the previous investiga-
tions have been highly consistent in reporting an increased
prevalence of major depressive disorder (MDD) in patients
with migraine. The discrepant studies were characterised
by several methodological differences or limitations that
may explain the lack of association with MDD. These
include the fact that the sample was not representative of
the general population or of clinic settings and the cohort
studied was notably younger and had a different sex com-
position than the other published investigations

In a population of subjects aged over 65 years, Wang et
al. found that the risk of current depression was much
greater in migraine sufferers than in non-migraine patients
[12]. Merikangas et al. investigated 457 younger subjects
and found an increased risk of developing major depres-
sion and anxiety disorders in migraine patients compared
with controls [13]. Lipton, in a population-based case-con-
trol study conducted in a community setting, confirmed a
higher risk of current depression among patients suffering
from migraine [3].

In another paper, Breslau reported that a history of
migraine is associated with increased frequencies of suici-
dal ideation and suicide attempts in patients with major
depression [28]. In the study of Fasmer and Oedegaard, the
frequency of suicide attempts was higher among the
patients having MWA than in patients affected by migraine
aura without headache (MAWH). This was despite the fact
that the frequency of suicidal thoughts was approximately
equal in the two groups [29]. In a recent study of 201
patients with MDD, the authors compared MWA and
MAWH. They observed that the MAWH group had a sig-
nificantly lower prevalence of affective temperaments and
suicide attempts [30]. Zwart et al., in a large cross-sec-
tional population-based study, observed that the OR for
depression was significantly higher in subjects with
migraine and non-migraine headache compared to the
headache-free group. Moreover, there was a strong linear
trend of higher prevalence of depression with increasing
headache frequency [31]
Comorbidity could dervive from a) Associated due to chance b) Migraine is a causal factor in the development of depression and other psychological conditions, or vice versa or c)Shared environmental risks, d) Commonly shared aetiological factor to explain the co-occurance of both conditions.

They found that migraineurs had a more than
three-fold relative risk of developing depression compared
with non-migraine patients; in turn, depression patients
that had not previously suffered from migraine had a more
than three-fold relative risk of developing migraine com-
pared with non-depressed patients. The association seems
to arise from the two conditions reciprocally affecting each
other in a “bidirectional” relationship rather than resulting
from a one-way action, thus ruling out the possibility that
mood disturbances may be secondary to repeated migraine
attacks [34]. 
There is evidence for involvement of both monoamine
(serotonin and dopamine) and peptide (endorphin and
encephalin) neurotransmitters in depression. Endorphins
and encephalins are involved in both mood and pain con-
trol. Serotonin (5HT) in particular has been implicated in
mood disorders, anxiety disorders, sleep disorders, eating
disorders, obsessive–compulsive disorder, migraine and
TTH. There is good evidence for the involvement of 5 HT1
receptor [36, 37]. Evidence is accumulating that dopamine
is also intimately involved in migraine. Migraine prodrome
is often characterised by dopaminergic symptoms and anti-
dopaminergic compounds can often be helpful in treatment
[38]. According to these data, it can be hypothesised that
severe headache, severe somatic symptoms and major
depression may be linked through dysfunction of the sero-
toninergic and dopaminergic systems

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