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Related Experiment Videos

Development of action representation during adolescence.

Suparna Choudhury1, Tony Charman, Victoria Bird

  • 1Behavioural & Brain Sciences, Institute of Child Health, University College London, London, UK. s.choudhury@ich.ucl.ac.uk

Neuropsychologia
|September 12, 2006
PubMed
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Internal models of action refine during adolescence, improving the accuracy of imagined movements. This study tracked hand action timing in adolescents and adults, finding enhanced correlation between execution and imagination in older individuals.

Area of Science:

  • Neuroscience
  • Developmental Psychology
  • Motor Control

Background:

  • Adolescence involves significant physical changes requiring updates to internal models of action.
  • Internal models are crucial for planning and executing movements.
  • The refinement of these models during adolescence is not fully understood.

Purpose of the Study:

  • To investigate the refinement of internal models of action between adolescence and adulthood.
  • To compare the chronometry of executed and imagined hand actions in adolescents and adults.
  • To determine if developmental changes in internal models are specific to motor imagery accuracy.

Main Methods:

  • Participants included 40 adolescents (mean age 13.1 years) and 33 adults (mean age 27.5 years).

Related Experiment Videos

  • Two motor imagery tasks were used, comparing the time for hand movement execution versus imagination.
  • Correlation analysis was performed between movement execution time and movement imagery time.

    • Main Results:

    • Movement execution time significantly correlated with movement imagery time in all participants.
    • A significant increase in the correlation between execution and imagery time was observed from adolescence to adulthood.
    • Cognitive-motor efficiency remained consistent, indicating age-related changes were specific to motor imagery accuracy.

    Conclusions:

    • Internal models of action undergo refinement during adolescence.
    • This refinement specifically impacts the accuracy of generating motor imagery.
    • Parietal cortex development during adolescence may facilitate this refinement process.