Low-resolution electromagnetic tomography (LORETA) of cerebral activity in chronic depressive disorder

In this study we compared the current density power and power asymmetry in 15 right-handed, medication-free chronically depressed females (of the unipolar type) and age-matched non-clinical female controls. We used frequency domain LORETA (Low-Resolution Electromagnetic Tomography). In the interhemi...

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Bibliographic Details
Published in:International journal of psychophysiology 2003-09, Vol.49 (3), p.175-185
Main Authors: Lubar, Joel F., Congedo, Marco, Askew, John H.
Format: Article
Language:English
Subjects:
Adult and adolescent clinical studies
Asymmetry
Biological and medical sciences
Chronic Disease
Depression
Depressive Disorder - physiopathology
EEG
Electroencephalography - methods
Electromagnetic Phenomena
Female
Humans
LORETA
Low-resolution electromagnetic tomography
Medical sciences
Mood disorders
Psychology. Psychoanalysis. Psychiatry
Psychopathology. Psychiatry
Telencephalon - physiopathology
Tomography, X-Ray Computed - methods
Unipolar depression
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Summary:In this study we compared the current density power and power asymmetry in 15 right-handed, medication-free chronically depressed females (of the unipolar type) and age-matched non-clinical female controls. We used frequency domain LORETA (Low-Resolution Electromagnetic Tomography). In the interhemispheric asymmetry analysis, compared with the control group, the depression group exhibited a left-to-right Alpha2 (10–12 Hz) current density dominance in the left postcentral gyrus. The pattern of left-to-right dominance included frontal (especially medial and middle frontal gyri) and temporal locations. The between groups comparison of spectral power revealed decreased activity in the right middle temporal gyrus in the depressed group. The decrease emerged in the whole frequency spectrum analyzed (2–32 Hz), although it reached significance in the Delta (2–3.5 Hz) band only. These findings are discussed in terms of the existing literature on affect using EEG, PET and SPECT.
ISSN:0167-8760
1872-7697
DOI:10.1016/S0167-8760(03)00115-6