Table 1.
Demographic characteristics of ASD and TD adults.
Fig 1.
VEPs for RG and BW stimuli at the occipital ROI in each group.
Grand-averaged waveforms show that N1 was a major component in both stimuli. Scalp topography shows N1 localized to the occipital area. VEPs, visual evoked potentials; RG, red/green; BW, black/white; ROI, region of interest.
Fig 2.
VEPs for face stimuli at the right occipital ROI in each group.
Grand-averaged waveforms illustrate that P1 was evoked as a major component for all facial expressions. Scalp topography shows that P1 was distributed over the bilateral occipital area with right dominance.
Fig 3.
VEPs for face stimuli at the right occipitotemporal ROI in each group.
Grand-averaged waveforms illustrate that N170 was evoked as a major component for all facial expressions. Scalp topography shows that N170 was distributed over the bilateral occipitotemporal area with right dominance.
Fig 4.
ROIs for each VEP measurement.
We defined three ROIs: occipital ROI for N1 in response to RG and BW stimuli, and right occipital ROI for P1 and right occipitotemporal ROI for N170 in response to face stimuli.
Fig 5.
Source analysis for VEPs with RG and BW stimuli in each group.
sLORETA activities were mapped onto the MNI space. N1 components for RG (A) and BW (B) stimuli were located at around occipital areas including V1 in both groups. sLORETA, standardized low resolution brain electromagnetic tomography; MNI, Montreal Neurological Institute.
Table 2.
VEPs for RG, BW, and face stimuli in ASD and TD adults.
Fig 6.
Source analysis for VEPs with face stimuli in each group.
sLORETA activities were mapped onto the MNI space. P1 (A) and N170 (B) components for neutral face stimuli were located at around occipital areas including V1 and occipitotemporal areas including V4, respectively, in both groups.
Table 3.
Comparison between lower (V1) and higher (V4) cortical responses in ASD and TD adults.