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Adolescents Exhibit Late Maturation of Long-Range Beta Coherences in Affective Processing.

We investigated whether intra-/interhemispheric long-range beta coherences mirror developmental changes in affective functional integration during adolescence. Electroencephalogram data were gathered from 15 young adolescents, 16 old adolescents, and 16 young adults during viewing affective pictures. The results indicated that both positive and negative pictures induced greater intra- and interhemispheric long-distance beta coherences than neutral pictures. However, opposite results were observed between young and old adolescents in terms of negative phase differences. Old adolescents exhibited greater beta coherences for positive and negative pictures than both young adolescents and young adults, but there was no difference between the groups for neutral pictures. These observations suggest that long-range beta coherence might reflect the late maturation of affective functional integration in adolescents.