Recognizing visual speech: Reduced responses in visual-movement regions, but not other speech regions in autism
Research output: Contribution to journal › Research article › Contributed › peer-review
Contributors
Abstract
Speech information inherent in face movements is important for understanding what is said in face-to-face communication. Individuals with autism spectrum disorders (ASD) have difficulties in extracting speech information from face movements, a process called visual-speech recognition. Currently, it is unknown what dysfunctional brain regions or networks underlie the visual-speech recognition deficit in ASD. We conducted a functional magnetic resonance imaging (fMRI) study with concurrent eye tracking to investigate visual-speech recognition in adults diagnosed with high-functioning autism and pairwise matched typically developed controls. Compared to the control group (n = 17), the ASD group (n = 17) showed decreased Blood Oxygenation Level Dependent (BOLD) response during visual-speech recognition in the right visual area 5 (V5/MT) and left temporal visual speech area (TVSA) - brain regions implicated in visual-movement perception. The right V5/MT showed positive correlation with visual-speech task performance in the ASD group, but not in the control group. Psychophysiological interaction analysis (PPI) revealed that functional connectivity between the left TVSA and the bilateral V5/MT and between the right V5/MT and the left IFG was lower in the ASD than in the control group. In contrast, responses in other speech-motor regions and their connectivity were on the neurotypical level. Reduced responses and network connectivity of the visual-movement regions in conjunction with intact speech-related mechanisms indicate that perceptual mechanisms might be at the core of the visual-speech recognition deficit in ASD. Communication deficits in ASD might at least partly stem from atypical sensory processing and not higher-order cognitive processing of socially relevant information.
Details
Original language | English |
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Pages (from-to) | 1078-1091 |
Number of pages | 14 |
Journal | NeuroImage. Clinical |
Volume | 20 |
Publication status | Published - 2018 |
Peer-reviewed | Yes |
Externally published | Yes |
External IDs
PubMedCentral | PMC6202694 |
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Scopus | 85055293045 |
ORCID | /0000-0001-7989-5860/work/142244381 |
Keywords
Keywords
- Adult, Autism Spectrum Disorder/pathology, Autistic Disorder/pathology, Brain/pathology, Brain Mapping/methods, Female, Humans, Magnetic Resonance Imaging/methods, Male, Middle Aged, Motion Perception/physiology, Recognition, Psychology/physiology, Speech/physiology, Visual Perception/physiology, Young Adult