Alpha wave asymmetry is associated with only one component of melancholia, and in different directions across brain regions

Title
Alpha wave asymmetry is associated with only one component of melancholia, and in different directions across brain regions
Publication Date
2023
Author(s)
Sharpley, Christopher F
( author )
OrcID: https://orcid.org/0000-0001-7922-4848
Email: csharpl3@une.edu.au
UNE Id une-id:csharpl3
Bitsika, Vicki
( author )
OrcID: https://orcid.org/0000-0003-2518-6684
Email: vbitsik2@une.edu.au
UNE Id une-id:vbitsik2
Shadli, Shabah M
Jesulola, Emmanuel
Agnew, Linda
( author )
OrcID: https://orcid.org/0000-0002-2803-0995
Email: lagnew2@une.edu.au
UNE Id une-id:lagnew2
Type of document
Journal Article
Language
en
Entity Type
Publication
Publisher
Elsevier Ireland Ltd
Place of publication
Ireland
DOI
10.1016/j.pscychresns.2023.111687
UNE publication id
une:1959.11/58559
Abstract

Alpha wave asymmetry inconsistently correlates with Major Depressive Disorder (MDD). One possible reason for this inconsistency is the heterogeneity of MDD, leading to study of depressive 'subtypes', one of which is Melancholia. To investigate the correlation between Melancholia and alpha-wave asymmetry, 100 community participants (44 males, 56 females" aged at least 18 yr) completed the Zung self-rated Depression Scale, and underwent 3 min of eyes closed EEG recording from 24 scalp sites. There was no significant correlation between EEG data and Melancholia total score for the entire sample, but there was for those participants who had clinically significant depression (n = 33). When examined at the level of individual Melancholia scale items, significant EEG data correlations were found for some of the items but not for others. Factor analysis revealed a two-factor structure for the Melancholia scale, only one of which exhibited significant correlations with EEG AA data. Further exploration of those data identified two subcomponents of that Melancholia factor, one which was inversely correlated with frontal alpha asymmetry, and another which was directly correlated with parietaloccipital alpha wave asymmetry. These findings suggest that Melancholia may itself be heterogeneous, similarly to MDD, and rely upon different aspects of cognitive function.

Link
Citation
Psychiatry Research: Neuroimaging, v.334, p. 1-9
ISSN
1872-7506
0925-4927
Start page
1
End page
9
Rights
Attribution-NonCommercial-NoDerivatives 4.0 International

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