How finger tapping practice enhances efficiency of motor control

Area of Science:

• Neuroscience
• Motor Control
• Motor Learning

Background:

• Maximum-speed movements require significant neural control demands on the primary motor cortex.
• Understanding how the brain adapts to enhance rapid motor skills is crucial for motor learning research.

Purpose of the Study:

• To investigate changes in primary motor cortex function following long-term practice aimed at increasing maximum movement rates.
• To determine the neural mechanisms underlying enhanced motor performance through practice.

Main Methods:

• Task-related spectral electroencephalogram (EEG) alpha-power was recorded to assess cortical function.
• Low-resolution brain electromagnetic tomography (LORETA) was employed to localize intracortical neuronal sources.
• Participants underwent training to enhance maximum movement rates.

Main Results:

• A significant decrease in neural activity was observed in the left hemisphere (ipsilateral to the trained hand) after training compared to pretraining.
• Neural activity in the right hemisphere remained constant throughout the training period.
• The findings suggest a shift in neural control strategies with practice.

Conclusions:

• Reduced involvement of the left primary motor cortex after training indicates increased neural efficiency in motor control.
• The right hemisphere's capacity to control demanding movements improves with training, leading to optimized performance.
• Practice-induced neural adaptations in the primary motor cortex are key to enhancing maximum movement rates.