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Atypical Visually Guided Precision Grip Control in Middle-Aged and Older Autistic Adults.

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  • 1Neurocognitive and Behavioral Development Laboratory, Department of Applied Physiology and Kinesiology, University of Florida, Gainesville, Florida, USA.

Autism Research : Official Journal of the International Society for Autism Research
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Autistic adults show persistent motor control difficulties into middle and older age, impacting grip precision and timing. These sensorimotor impairments correlate with age and autistic traits, suggesting shared neurobiological underpinnings.

Keywords:
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Area of Science:

  • Neuroscience
  • Developmental Psychology
  • Motor Control

Background:

  • Sensorimotor impairments are common in autism spectrum disorder (ASD).
  • Limited research exists on motor difficulties in middle-aged and older autistic adults.
  • Understanding these challenges is crucial for adult ASD support.

Purpose of the Study:

  • To investigate sensorimotor control in precision gripping among middle-aged and older autistic adults.
  • To examine the relationship between motor impairments, age, and autistic traits.
  • To identify age-related differences in motor deficits within the autistic adult population.

Main Methods:

  • 52 autistic and 56 non-autistic adults (30-73 years) performed a visually guided precision grip task.
  • Assessed temporal (reaction time, duration), spatial (force accuracy, variability), and dynamic (rate of force change) grip features.
  • Evaluated grip control under varying motor output demands and visual feedback conditions.

Main Results:

  • Autistic adults exhibited prolonged grip duration, delayed reaction time, and overshooting at low forces.
  • Increased grip force variability was observed during the sustained phase in autistic adults.
  • Older autistic adults showed broader spatial and temporal grip impairments compared to middle-aged counterparts.

Conclusions:

  • Manual motor impairments persist throughout adulthood in individuals with ASD.
  • Age and autistic traits, particularly repetitive behaviors, are associated with temporal grip deficits.
  • Findings suggest shared neurobiological mechanisms underlying motor dysfunction and core autistic traits.