Disrupted sensorimotor predictions in high autistic characteristics.

Researchers studied how people with high autistic traits process visual information during rapid eye movements. They found that people with more autistic traits had difficulty detecting moving patterns during eye movements, while their vision was normal when eyes stayed still. This suggests their brains struggle to predict how their own movements affect what they see, which might explain why sensory experiences can feel overwhelming for autistic people.

This study investigated sensorimotor processing differences in individuals with high versus low autistic traits, focusing on saccadic omission - the brain's ability to maintain stable vision during rapid eye movements. Participants made eye movements to targets while reporting locations of moving visual patterns. Results showed individuals with high autistic traits had significantly reduced sensitivity to motion during saccades compared to those with low autistic traits, while showing no differences during fixation. This suggests impaired efference copy mechanisms, where the brain fails to properly predict how self-generated movements affect sensory input.

The findings may help explain sensory overload experiences commonly reported in autism.

Findings suggest sensorimotor integration difficulties may underlie visual processing challenges in autism. This could inform development of targeted interventions for sensory sensitivities and support understanding of why environmental modifications are often helpful for autistic individuals.

Sample size not reported. Study type unclear. Examined autistic traits in general population rather than diagnosed autism. Results are correlational and cannot establish causation. Limited information about participant characteristics and methodology details.

Humans maintain a stable view of the world by omitting self-generated motion during rapid eye movements, or saccades. An efferent copy of the saccade motor command informs visual processing about the self-produced motion. However, efference copy information has been demonstrated to be disrupted in individuals with high autistic traits. Here, we investigated saccadic omission in participants with high vs. low autistic traits.

Participants made saccades to peripheral targets and reported the location of drifting gratings that became visible during saccade execution. Sensitivity to motion was also assessed in a fixation condition, where retinal velocities matched those experienced during saccades. Our findings reveal that individuals with heightened autistic traits exhibit significantly reduced sensitivity to motion during saccades compared to those with low autistic traits, while no Autistic Quotient-dependent differences were observed in the fixation condition. These results suggest that impairments in sensorimotor processing affect the ability of individuals with high autistic traits to predict how their own movements affect the sensory input.

The lack of sensorimotor integration might explain the sensory overload that autistics frequently experience.