Microstructural Anomalies Evaluated by Neurite Orientation Dispersion and Density Imaging Are Related to Deficits in Facial Emotional Recognition via Perceptual-Binding Difficulties in Autism Spectrum Disorder.
Autistic people’s face emotion errors link to weak cross-hemisphere wiring seen on NODDI scans.
01Research in Context
What this study did
Researchers used a special brain scan called NODDI. It shows the tiny wires that connect brain cells.
They looked at people with autism and people without autism. Everyone tried to read faces shown through narrow horizontal slits. This setup forces the brain to join left-side and right-side information.
The team checked if poor face reading went hand-in-hand with weak wiring in the corpus callosum and face areas.
What they found
The autism group struggled to name emotions when the face was shown in slit view. Their brains had lower NODDI values in the corpus callosum and face patches.
Lower wire density predicted worse emotion reading. The trouble seems to come from trouble merging left-eye and right-eye pictures.
How this fits with other research
Van der Donck et al. (2023) saw normal brain responses to quick face changes in adults with autism. That sounds opposite, but they tested adults and used fast EEG flashes. Fumihiko studied slit-view tasks that stress cross-hemisphere teamwork, so the gap likely reflects age and task differences, not a true clash.
Zwiya et al. (2023) also used NODDI and found thinner neurite density in the left prefrontal cortex of adults with autism. Together the papers map micro-wire problems across the brain, linking each site to a social skill: empathy in T’s work, face reading here.
Hartston et al. (2023) showed face recognition problems in adults come from perceptual flaws, not memory. The new scan data backs that idea: faulty wires make the first look at a face messy, so later memory can’t fix it.
Why it matters
You now have a clearer why behind face-reading struggles: weak cross-brain cables. When a learner misses subtle cues, break tasks into left-field and right-field parts first, then practice joining them. Use wide pictures, slow presentations, or tactile cues to give each hemisphere a clean signal. Targeting the joining step may boost social programs more than drilling emotion labels alone.
Want CEUs on This Topic?
The ABA Clubhouse has 60+ free CEUs — live every Wednesday. Ethics, supervision & clinical topics.
Join Free →Cover half of an emotion card at a time; teach the learner to merge left and right views before naming the feeling.
02At a glance
03Original abstract
The integration of visual features is important for recognizing objects as a coherent whole, a key domain of difficulty in autism spectrum disorder (ASD). We tested the hypothesis that ASD patients exhibit difficulties in facial emotional recognition via perceptual binding difficulties due to weak coherence. We assessed 18 ASD and 27 typically developing individuals for their ability to identify emotional expressions from faces in pictures moving behind a narrow vertical and horizontal slit. In this task, only a single local piece of facial information was provided at any one time through the slit. Using a voxel-based analysis of neurite-orientation dispersion and density imaging (NODDI), we examined the relationship between NODDI index values at each voxel and the behavioral performance of ASD patients in the slit-viewing paradigm. ASD patients demonstrated impaired recognition of facial emotional expression only in horizontal slit-viewing. This deficit was associated with deficits in communication ability. Voxel-based analysis revealed significant negative correlations between behavioral deficits in horizontal slit-viewing and NODDI index values in clusters including the ventral occipital complex region, superior temporal/parietal association areas, and forceps major of the corpus callosum. Our results indicated deficits for the first time in perceptual integration of facial expression across hemispheres in ASD patients due to microstructural disturbances in the corpus callosum and areas related to viewing of the human face. This may underscore the difficulties faced by ASD patients in understanding the emotions of other people, contributing to impairments in communication ability in ASD patients. Autism Res 2020, 13: 729-740. © 2020 International Society for Autism Research, Wiley Periodicals, Inc. LAY SUMMARY: We assessed ASD and typically developing individuals for their ability to identify emotional expressions from faces in pictures moving behind a narrow vertical and horizontal slit. ASD patients demonstrated impaired recognition of facial emotional expression only in horizontal slit-viewing. Voxel-based analysis revealed significant negative correlations between behavioral deficits and NODDI index values in clusters including the corpus callosum. Our results indicated deficits in perceptual integration of facial expression across hemispheres in ASD patients potentially resulting from microstructural disturbances.
Autism research : official journal of the International Society for Autism Research, 2020 · doi:10.1002/aur.2280