Volumetric neuroimaging investigations in mood disorders: bipolar disorder versus major depressive disorder

2008 ◽  
Vol 10 (1) ◽  
pp. 1-37 ◽  
Author(s):  
Jakub Z Konarski ◽  
Roger S McIntyre ◽  
Sidney H Kennedy ◽  
Shahryar Rafi-Tari ◽  
Joanna K Soczynska ◽  
...  
Keyword(s):  
Bipolar Disorder ◽  
Major Depressive Disorder ◽  
Depressive Disorder ◽  
Mood Disorders ◽  
Major Depressive

scholarly journals EEG Frontal Asymmetry in Dysthymia, Major Depressive Disorder and Euthymic Bipolar Disorder

Symmetry ◽  
2021 ◽  
Vol 13 (12) ◽  
pp. 2414
Author(s):  
Chiara Spironelli ◽  
Francesca Fusina ◽  
Marco Bortolomasi ◽  
Alessandro Angrilli
Keyword(s):  
Bipolar Disorder ◽  
Major Depressive Disorder ◽  
Depressive Disorder ◽  
Mood Disorders ◽  
Quantitative Eeg ◽  
Beta Activity ◽  
Major Depressive ◽  
Eeg Asymmetry ◽  
Frontal Asymmetry ◽  
Frontal Eeg Asymmetry

In the last few decades, the incidence of mood disorders skyrocketed worldwide and has brought an increasing human and economic burden. Depending on the main symptoms and their evolution across time, they can be classified in several clinical subgroups. A few psychobiological indices have been extensively investigated as promising markers of mood disorders. Among these, frontal asymmetry measured at rest with quantitative EEG has represented the main available marker in recent years. Only a few studies so far attempted to distinguish the features and differences among diagnostic types of mood disorders by using this index. The present study measured frontal EEG asymmetry during a 5-min resting state in three samples of patients with bipolar disorder in a Euthymic phase (EBD, n = 17), major depressive disorder (MDD, n = 25) and persistent depressive disorder (PDD, n = 21), once termed dysthymia. We aimed to test the hypothesis that MDD and PDD lack the typical leftward asymmetry exhibited by normal as well as EBD patients, and that PDD shows greater clinical and neurophysiological impairments than MDD. Clinical scales revealed no symptoms in EBD, and significant larger anxiety and depression scores in PDD than in MDD patients. Relative beta (i.e., beta/alpha ratio) EEG asymmetry was measured from lateral frontal sites and results revealed the typical greater left than right frontal beta activity in EBD, as well as a lack of asymmetry in both MDD and PDD. The last two groups also had lower bilateral frontal beta activity in comparison with the EBD group. Results concerning group differences were interpreted by taking into account both the clinical and the neurophysiological domains.

scholarly journals Age-Related Increase in the Number of Oligodendrocytes Is Dysregulated in Schizophrenia and Mood Disorders

2011 ◽  
Vol 2011 ◽  
pp. 1-10 ◽  
Author(s):  
Victor Vostrikov ◽  
Natalya Uranova
Keyword(s):  
Bipolar Disorder ◽  
Major Depressive Disorder ◽  
Prefrontal Cortex ◽  
White Matter ◽  
Depressive Disorder ◽  
Mood Disorders ◽  
Numerical Density ◽  
Major Depressive ◽  
Age Related ◽  
Related Increase

The postnatal maturation of the human prefrontal cortex is associated with substantial increase of number of oligodendrocytes. Previously, we reported decreased numerical density of oligodendrocytes in the prefrontal cortex in schizophrenia and mood disorders. To gain further understanding of the role oligodendrocytes in pathogenesis of schizophrenia and mood disorders, we examined the effect of the age on the number of oligodendrocytes in the prefrontal cortex in schizophrenia, bipolar disorder, and major depressive disorder. We revealed the age-related increase in numerical density of oligodendrocytes in layer VI and adjacent white matter of BA10 and BA 9 in normal controls but not in schizophrenia, bipolar disorder, and major depressive disorder. The absence of normal increase in the number of oligodendrocytes in gray and white matter with age in schizophrenia and mood disorders suggests that age-related process of oligodendrocyte increase is dysregulated in schizophrenia and mood disorders.

scholarly journals The genetics of the mood disorder spectrum: genome-wide association analyses of over 185,000 cases and 439,000 controls

2018 ◽  
Author(s):  
Jonathan R. I. Coleman ◽  
Héléna A. Gaspar ◽  
Julien Bryois ◽  
Gerome Breen ◽  
◽  
...  
Keyword(s):  
Bipolar Disorder ◽  
Major Depressive Disorder ◽  
Major Depression ◽  
Depressive Disorder ◽  
Mood Disorders ◽  
Genome Wide Association ◽  
Genome Wide Association Studies ◽  
Major Depressive ◽  
Genome Wide ◽  
Genome Wide Significance

AbstractBackgroundMood disorders (including major depressive disorder and bipolar disorder) affect 10-20% of the population. They range from brief, mild episodes to severe, incapacitating conditions that markedly impact lives. Despite their diagnostic distinction, multiple approaches have shown considerable sharing of risk factors across the mood disorders.MethodsTo clarify their shared molecular genetic basis, and to highlight disorder-specific associations, we meta-analysed data from the latest Psychiatric Genomics Consortium (PGC) genome-wide association studies of major depression (including data from 23andMe) and bipolar disorder, and an additional major depressive disorder cohort from UK Biobank (total: 185,285 cases, 439,741 controls; non-overlapping N = 609,424).ResultsSeventy-three loci reached genome-wide significance in the meta-analysis, including 15 that are novel for mood disorders. More genome-wide significant loci from the PGC analysis of major depression than bipolar disorder reached genome-wide significance. Genetic correlations revealed that type 2 bipolar disorder correlates strongly with recurrent and single episode major depressive disorder. Systems biology analyses highlight both similarities and differences between the mood disorders, particularly in the mouse brain cell types implicated by the expression patterns of associated genes. The mood disorders also differ in their genetic correlation with educational attainment – positive in bipolar disorder but negative in major depressive disorder.ConclusionsThe mood disorders share several genetic associations, and can be combined effectively to increase variant discovery. However, we demonstrate several differences between these disorders. Analysing subtypes of major depressive disorder and bipolar disorder provides evidence for a genetic mood disorders spectrum.

Mood Disorders

2017 ◽  
Author(s):  
Harvinder Singh ◽  
Brian Frankel
Keyword(s):  
Bipolar Disorder ◽  
Major Depressive Disorder ◽  
Depressive Disorder ◽  
Mood Disorders ◽  
Major Depressive ◽  
Bipolar Ii Disorder ◽  
Bipolar I Disorder ◽  
Bipolar Ii ◽  
Cyclothymic Disorder ◽  
Persistent Depressive Disorder

In this chapter the topics that are reviewed include major depressive disorder, persistent depressive disorder (dysthymia), unspecified depressive disorder, bipolar I disorder, bipolar II disorder, cyclothymic disorder and unspecified bipolar disorder

Mood Disorders

2014 ◽  
Author(s):  
Licínia Ganança ◽  
David A. Kahn ◽  
Maria A. Oquendo
Keyword(s):  
Bipolar Disorder ◽  
Major Depressive Disorder ◽  
Depressive Disorder ◽  
Mood Disorders ◽  
Selective Serotonin Reuptake Inhibitors ◽  
Premenstrual Dysphoric Disorder ◽  
Major Depressive ◽  
Somatic Therapy ◽  
Mixed Features ◽  
Symptom Ratings

This chapter discusses the mood disorders. Major depressive disorder is characterized by neurovegetative changes, anhedonia, and suicidal ideation. Persistent depressive disorder is a milder form of depression, lasting for at least 2 years, with little or no remission during that time... Psychotic features can occur in both depressive and manic episodes. Premenstrual dysphoric disorder is diagnosed through use of a prospective daily symptom ratings log showing a cyclical pattern over at least 2 consecutive months. Patients with mood episodes with mixed features have a high risk of suicide. Some patients with bipolar disorder and major depressive disorder may develop catatonic features characterized by marked psychomotor disturbance. Selective serotonin reuptake inhibitors (SSRIs) are the usual first-line medication treatment for patients with major depressive disorder. For patients with bipolar disorder the mainstays of somatic therapy are lithium and the anticonvulsants valproate and carbamazepine.

Which disorders precede the development of mood disorders in young people?

2020 ◽  
Keyword(s):  
Mental Health ◽  
Bipolar Disorder ◽  
Major Depressive Disorder ◽  
Young People ◽  
Depressive Disorder ◽  
Mood Disorders ◽  
Mental Health Disorders ◽  
Major Depressive ◽  
The Usa ◽  
Health Disorders

Mood disorders such as bipolar disorder (BPD) and major depressive disorder (MDD) typically emerge in childhood or adolescence. Now, researchers in Switzerland, the USA and Canada have investigated whether certain other mental health disorders precede the onset of mood disorders

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