Computational and Mathematical Methods in Medicine

Research Article

Biological Computation Indexes of Brain Oscillations in Unattended Facial Expression Processing Based on Event-Related Synchronization/Desynchronization

Table 1

ERD/ERS computation indexes results in each frequency band, containing main effects and interaction effects in each time interval (ms).
Frequency bandInterval (ms)Main effectInteraction effect
Delta (1–4 Hz)0~100Stimulus Type in the left frontalFacial Expression × Brain Area 
Stimulus Type × Brain Area
100~200Stimulus Type in the right central and left parietal-occipitalFacial Expression × Brain Area
200~300Stimulus Type 
Stimulus Type in individual Brain Area		Facial Expression × Stimulus Type × Brain Area
300~400Stimulus Type 
Stimulus Type in individual Brain Area		Facial Expression × Stimulus Type × Brain Area
Theta (4–8 Hz) 0~100Stimulus Type 
Stimulus Type in the right central		 
100~200Stimulus Type 
Stimulus Type in the left (right) frontal and the left (right) central		 
200~300Stimulus Type 
Stimulus Type in the left (right) frontal, the left (right) central, and the left parietal-occipital		 
300~400Stimulus Type 
Stimulus Type in the left (right) frontal, the left (right) central, and the left parietal-occipital		 
Alpha 1 (8–11 Hz)0~100Brain Area 
100~250Brain Area 
250~400Brain Area 
Alpha 2 (11–13 Hz) 0~100Facial Expression 
Brain Area 
Hemisphere 
Facial Expression in the left central		 
100~250Brain AreaFacial Expression × Stimulus Type in the right parietal-occipital
250~400 Brain Area × Hemisphere
Beta 1 (13–20 Hz) 50~150  
150~250Facial Expression in the right central and the left (right) parietal-occipitalFacial Expression × Brain Area
250~300Stimulus Type in the left centralFacial Expression × Stimulus 
Type × Brain Area
300~350Facial Expression in the left parietal-occipitalFacial Expression × Stimulus Type × Brain Area
350~400Facial ExpressionFacial Expression × Stimulus Type × Brain Area
Beta 2 (20–30 Hz) 50~150Facial Expression in the left frontal 
150~250  
250~300 Facial Expression × Stimulus Type × Brain Area
Expression × Stimulus Type in the left frontal (central)
300~350Facial Expression in the left frontal (central)Facial Expression × Stimulus Type 
Facial Expression × Stimulus Type in the left central
350~400Stimulus Type in the left centralFacial Expression × Stimulus Type in the left central