Executed and imagined bimanual movements: a study across different ages.

Area of Science:

• Neuroscience
• Developmental Psychology
• Motor Control

Background:

• Bimanual movements are crucial for daily activities.
• Asymmetric bimanual movements cause interference between hands.
• Bimanual movement skills develop throughout childhood and adolescence.

Purpose of the Study:

• To investigate the development of bimanual movements across different age groups, including late adulthood.
• To examine the role of motor imagery in bimanual movements across the lifespan.
• To analyze interference effects in bimanual tasks under real and imagined movement conditions.

Main Methods:

• Recruited participants from four distinct age groups.
• Utilized a spatial bimanual task with congruent and noncongruent movements.
• Compared performance in a Real condition (actual movement) and an Imagery condition (imagined movement).

Main Results:

• Movement interference was highest in children (6-10) and elderly adults (60-80), and lower in young adults (20-30).
• Motor imagery showed interference only in 10-year-olds and young adults.
• Motor imagery did not modulate performance in very young children or the elderly.

Conclusions:

• Bimanual movement interference follows a U-shaped developmental trajectory across the lifespan.
• Motor imagery's contribution to bimanual tasks is age-dependent, developing in childhood and diminishing in older age.
• These findings highlight the evolving neural mechanisms underlying bimanual coordination and motor imagery.