Electroencephalography findings in menstrually-related mood disorders: A critical review

Kaltsouni, Elisavet; Schmidt, Felix; Zsido, Rachel G.; Eriksson, Allison; Sacher, Julia; Sundström-Poromaa, Inger; Sumner, Rachael L.; Comasco, Erika

doi:10.1016/j.yfrne.2023.101120

Cited by 1 publication

(1 citation statement)

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“…Further, although some EEG studies have restricted their samples to right-handed participants, there is no certainty that left hemispheric brain dominance is determined entirely by right handedness, as evidenced by the finding that 61% to 70% of left-handed people also have left hemispheric dominance (Segalowitz and Bryden 1983; Clarke, Howard et al 2009). There is some evidence that the female menstrual cycle can influence depression [ 27 ] and EEG [ 28 ], although there is also evidence to the contrary [ 29 ] and some data which suggest that this effect is most often observed in the EEG alpha wave signal from frontal regions of the brain [ 30 ] (which were not collected in this study), or is part of a relationship between the menstrual cycle and related mood disorders [ 31 ]. Significant proportions of the current sample of females refused a question regarding their menstrual cycle or their contraceptive habits and also refused a salivary test for luteal phase.…”

Section: Methodsmentioning

confidence: 99%

Depression Severity, Slow- versus Fast-Wave Neural Activity, and Symptoms of Melancholia

Sharpley,

Bitsika,

Evans

et al. 2024

Brain Sciences

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Melancholia is a major and severe subtype of depression, with only limited data regarding its association with neurological phenomena. To extend the current understanding of how particular aspects of melancholia are correlated with brain activity, electroencephalographic data were collected from 100 adults (44 males and 56 females, all aged 18 y or more) and investigated for the association between symptoms of melancholia and the ratios of alpha/beta activity and theta/beta activity at parietal–occipital EEG sites PO1 and PO2. The results indicate differences in these associations according to the depressive status of participants and the particular symptom of melancholia. Depressed participants exhibited meaningfully direct correlations between alpha/beta and theta/beta activity and the feeling that “Others would be better off if I was dead” at PO1, whereas non-depressed participants had significant inverse correlations between theta/beta activity and “Feeling useless and not needed” and “I find it hard to make decisions” at PO1. The results are discussed in terms of the relative levels of fast-wave (beta) versus slow-wave (alpha, theta) activity exhibited by depressed and non-depressed participants in the parietal–occipital region and the cognitive activities that are relevant to that region.

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