Abnormal Early Gamma Responses to Emotional Faces Differentiate Unipolar from Bipolar Disorder Patients
Figure 4
The scatterplots showed individual discriminant function scores of the MDD and BD patients. The black bars illustrated the patient group means. The stepwise discriminant analysis identified four abnormal regional GBAIs of the most discriminating from the MDD (blue circle) and BD (red star) patients (F 4,43 = 9.77, ) and the function scores were significantly different (t 47 = 20.87, ). The two BD patients (black circle) were initially diagnosed as the MDD patients. The four abnormal regions include the left superior medial frontal cortex (happy 35 ms), the right medial orbitofrontal cortex (happy 35 ms), the right anterior insula/inferior orbitofrontal cortex (sad 60 ms), and the right precentral cortex (sad 105 ms). MDD: major depressive disorder; BD: bipolar disorder; GBAI: gamma-band activation index.
