The Relationship between the Rest Alpha Asymmetry and the Depression and AnxietySymptoms of DASS-21 Questionnaire

EEG asymmetry in brain function and emotional states as left hyperactivity in approach tendencies (positive emotions) and right hyperactivity in withdrawal tendencies (negative emotions) including depression was reported in previous studies. Left frontal alpha asymmetry (FA، right hyperactivity) was seen in depression. Depression Anxiety Stress Scale (DASS) is designed to assess the depression، anxiety and stress essentially in nonclinical population. The aim of the present study is investigation of the correlation between alpha asymmetry and depression and anxiety subscales of DASS-21 self report. The 25 participants completed DASS-21 and their EEGs were recorded by 19-chanel system. The alpha (8-12) Hz asymmetry was calculated by subtracting the left channels from right channels alpha mean power. There was significant negative correlation between alpha asymmetry in F4-3، C4-3 and O2-1 and depression symptoms with the highest correlation coefficient in F4-3. In general، in addition to the relationship between the left FA asymmetry and depression symptoms، left FA asymmetry could significantly predict itin nonclinical participants.