Atypical neural processing during the execution of complex sensorimotor behavior in autism.

Area of Science:

• Neuroscience
• Developmental Psychology
• Clinical Psychology

Background:

• Stereotyped movements are common in autism spectrum disorder (ASD) and typical development (TD).
• In TD, stereotypy is thought to transition to complex motor behavior via sensorimotor integration.
• Persistent stereotypy in ASD may stem from sensorimotor integration deficits.

Purpose of the Study:

• To investigate sensorimotor processing differences in adults with ASD compared to TD adults.
• To determine if these differences contribute to motor behavior complexity and stereotypy in ASD.

Main Methods:

• Adults with ASD and TD performed a computer-based stimulus-tracking task with and without visual feedback.
• Electroencephalography (EEG) was recorded to assess neural activity.
• Motor performance, motor complexity, and neural complexity were analyzed and compared between groups and conditions.

Main Results:

• No significant group differences were observed in motor performance or motor complexity.
• The ASD group exhibited greater neural complexity and larger differences between visual feedback conditions compared to the TD group.
• Motor performance and complexity in the ASD group correlated with the severity of clinical stereotypy.

Conclusions:

• Individuals with ASD demonstrate distinct sensorimotor processing during complex motor tasks.
• Differences in sensorimotor processing may underlie the persistence of stereotyped behavior in ASD.
• Stereotypy in ASD is associated with reduced motor complexity, suggesting a link to altered neural processing.