Voluntary attention in Asperger's syndrome: Brain electrical oscillation and phase-synchronization during facial emotion recognition |
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| Affiliation: | 1. Institute of Statistical Science, Academia Sinica, Taipei 115, Taiwan;2. Department of Electrical Engineering, Fu Jen Catholic University, New Taipei City 24205, Taiwan;3. Institute of Psychology, Fo Guang University, Jiaosi, Yilan County 26247, Taiwan;4. State Research Institute of Physiology and Fundamental Medicine, Siberian Branch of Russian Academy of Medical Sciences, Novosibirsk, Russia;5. Psychology Department, National Research Tomsk State University, Tomsk, Russia;6. Imaging Research Center, Taipei Medical University, Taipei 110, Taiwan;1. V.E. Zuev Institute of Atmospheric Optics SB RAS, Academician Zuev sq. 1, Tomsk 634055, Russia;2. National Research Tomsk State University, Lenin Ave. 36, Tomsk 634050, Russia;1. V.E. Zuev Institute of Atmospheric Optics, Siberian Branch, Russian Academy of Sciences, 1 Academician Zuev Square, 634021 Tomsk, Russia;2. Tomsk State University, Tomsk 634050 Russia;1. School of Psychological Sciences, Monash University, Clayton, Victoria, Australia;2. Monash Alfred Psychiatry Research Centre, The Alfred and Central Clinical School Monash University, Melbourne, Victoria, Australia;3. Cognitive Neuroscience Unit, School of Psychology, Deakin University, Burwood, Victoria, Australia;1. Department of Psychology, University of Manitoba, Winnipeg, Manitoba, R3T 2N2, Canada;2. Department of Psychology, University of Winnipeg, Winnipeg, Manitoba, R3B 2E9, Canada;1. University of Washington, Department of Radiology, 850 Republican St., Seattle, WA, USA;2. National Research Tomsk State University, Research Institute of Biology and Biophysics, 36 Lenina Ave, Tomsk, Russia;3. Institute of Cytology and Genetics, The Siberian Branch of the Russian Academy of Sciences, Prospekt Lavrentyeva 10, Novosibirsk, Russia |
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| Abstract: | This study investigated electroencephalography (EEG) oscillatory activity and phase-synchronization in patients with Asperger's syndrome (AS) during visual recognition of emotional faces. In the experiment, 10 AS adults (2 females, age 19.6 ± 1.96) and 10 IQ-matched controls (3 females, age 24.4 ± 3.24) participated in tasks involving emotionality evaluation of either photograph or line-drawing faces. Emotional faces elicited comparable reaction times and evaluation scores between the two groups. In the photograph task, the AS group had no visible N400 component and lower delta/theta synchronization (350–450 ms post-stimulus onset) in the temporal and occipital–parietal regions, and much weaker phase synchronization between distant scalp regions (200–500 ms post-stimulus onset) compared with the control group. In the line-drawing task, the two groups had the same degree of delta/theta synchronization in the central and occipital–parietal regions and comparable phase synchronization between scalp regions. We conclude by hypothesizing that AS patients might have structural deficits in the amygdala and its related limbic structures, a site critical for recognition of emotional faces beyond conscious awareness, but that they preserve the intact function in the cognitive pathway to keep up comparable behavioral performances with the healthy controls through voluntary control of attention. |
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| Keywords: | Asperger syndrome EEG Facial emotion recognition Spatial frequency Event-related spectral perturbations (ERSP) Phase synchronization |
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