Planning and Executing Aiming Movements in Middle Childhood

Area of Science:

• Neuroscience
• Developmental Psychology
• Motor Control

Background:

• Voluntary movements require efficient planning and execution.
• Middle childhood involves significant neuro-musculoskeletal development impacting motor skills.
• Understanding motor development in children is crucial for identifying developmental milestones.

Purpose of the Study:

• To evaluate motor planning and execution of aiming movements in children aged 7, 9, and 11 years.
• To investigate how target location (ipsilateral vs. contralateral) affects aiming movements in different age groups.
• To analyze temporal and spatial characteristics of motor performance during development.

Main Methods:

• 43 right-handed children were divided into three age groups: 7, 9, and 11 years old.
• Participants performed aiming movements using a stylus on a digital tablet towards targets.
• Movements were directed towards ipsilateral and contralateral targets relative to the dominant limb; temporal and spatial variables were analyzed.

Main Results:

• 7-year-old children exhibited more initial direction errors and movement corrections compared to older children.
• No significant differences in movement accuracy or precision were found across age groups.
• Movements towards contralateral targets were slower but more accurate than ipsilateral movements for all participants.

Conclusions:

• Aiming movement skills develop significantly during middle childhood.
• Motor planning and execution efficiency improve with age, particularly in reducing initial errors and corrections.
• Target location influences movement dynamics, with contralateral targets demanding greater accuracy at the cost of speed.