Delta Event-Related Oscillations Are Related to a History of Extreme Binge Drinking in Adolescence and Lifetime Suicide Risk

Figures

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  Figure 1. Event related oscillation (ERO) energy color equivalent maps in American Indians and Mexican Americans for each stimulus type. Parietal lead (PZ) electrode location is shown for the 0–6 Hz frequency range and −100 ms to 850 ms. Delta frequency band region of interest is (1–4 Hz) for the 200 to 500 ms time interval. Stimulus is presented at 0 ms.

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  Figure 2. Suicide activity in American Indian (AI) and Mexican American (MA) participants with and without a history of adolescent extreme binge drinking. Percentage of subjects in each binge group shown for suicide activity: Thoughts or acts. Two 2 × 2 × 2 analyses were run comparing no suicide activity to thoughts in one, and acts in the second. Race and binge were included in both. * indicates G square p-value less than 0.001.

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  Figure 3. Event related oscillations (ERO) energy (A) and connectivity (B) comparing stimuli (Sad, Neutral, and Happy faces) in the delta frequency band (1–4 Hz) for the 200 to 500 ms time interval in all three electrode locations. Sad and Happy faces had significantly different energy and connectivity when compared to Neutral faces in all three electrode locations. * indicates repeated measure ANOVA p-value less than 0.01.

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  Figure 4. Event related oscillations (ERO) energy (A) and connectivity (B), shown in the delta frequency band (1–4 Hz) for the 200 to 500 ms time interval. Significant regions of interests (channel and stimulus type) are shown for subjects with and without a history of adolescent extreme binging. * indicates ANOVA co-varied for age and race p-value less than 0.05.

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  Figure 5. Subjects with no suicidal activity compared to those with suicidal thoughts by their (ERO) energy and connectivity shown in the delta frequency band (1–4 Hz) for the 200 to 500 ms time interval. * indicates ANOVA co-varied for age and race p-value less than 0.05.

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  Figure 6. Subjects with no suicidal activity compared to those with suicidal acts by their (ERO) connectivity (local phase locking) shown in the delta frequency band (1–4 Hz) for the 200 to 500 ms time interval. * indicates ANOVA co-varied for age and race p-value less than 0.05.