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Adults with Developmental Coordination Disorder (DCD) show persistent oculomotor control issues, including saccadic inhibition and attention difficulties, impacting daily life across the lifespan.

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Area of Science:

  • Neuroscience
  • Developmental Psychology
  • Ophthalmology

Background:

  • Developmental Coordination Disorder (DCD), or dyspraxia, affects motor skills in adults.
  • Oculomotor control deficits are known in childhood DCD but less understood in adults.
  • Understanding these mechanisms is crucial for addressing daily life impacts.

Purpose of the Study:

  • To investigate oculomotor control differences in adults with and without probable DCD.
  • To assess visual fixation stability, smooth pursuit, and saccade performance.
  • To determine if oculomotor issues persist into adulthood for individuals with DCD.

Main Methods:

  • Compared 21 adults with probable DCD/dyspraxia (pDCD) to 21 typically-developing (TD) adults.
  • Utilized eye-tracking technology to measure visual fixation, smooth pursuit, and pro- and anti-saccade tasks.
  • Analyzed saccadic inhibition, pursuit gain, and attentional engagement.

Main Results:

  • Adults with pDCD exhibited more saccades away from targets and higher anti-saccade error rates.
  • Lower pursuit gain in faster tasks and difficulties maintaining engagement were observed in the pDCD group.
  • Response preparation and slower pursuit gain were comparable between groups.

Conclusions:

  • Adults with pDCD demonstrate impaired saccadic inhibition and attention maintenance.
  • Oculomotor difficulties in DCD appear to persist throughout the lifespan.
  • Recognizing these persistent oculomotor issues is key to understanding DCD's impact on daily activities.