Is there a "neural efficiency" in athletes? A high-resolution EEG study

Area of Science:

• Neuroscience
• Sports Science
• Motor Control

Background:

• The "neural efficiency" hypothesis suggests experts exhibit spatially focused cortical activity.
• This study investigates if elite athletes display reduced cortical activation during expert-specific visuo-motor tasks.

Purpose of the Study:

• To test the "neural efficiency" hypothesis in elite athletes (fencing, karate) compared to non-athletes.
• To examine the influence of movement side on cortical activation patterns.

Main Methods:

• Electroencephalography (EEG) recorded from 56 channels in 33 right-handed subjects (11 non-athletes, 11 elite fencers, 11 elite karate athletes).
• Participants observed sport-specific attacks and responded to stimuli presented on the right or left side.
• EEG data analyzed for readiness potential and motor potential amplitudes over sensorimotor areas, using surface Laplacian estimation.

Main Results:

• For right-sided movements, non-athletes showed higher cortical potentials over supplementary motor and contralateral sensorimotor areas than elite athletes.
• Elite karate athletes exhibited distinct motor potential amplitudes and bilateral sensorimotor area activation compared to elite fencers and non-athletes for right-sided movements.
• No significant differences were observed between groups for left-sided movements.

Conclusions:

• The "neural efficiency" hypothesis is not fully supported, as elite athletes' cortical organization is complex.
• Neural efficiency in elite athletes is influenced by factors including movement side, hemisphere, and specific athletic discipline.