Enhanced structural connectivity within the motor loop in professional boxers prior to a match

Area of Science:

• Neuroscience
• Motor Control
• Sports Science

Background:

• Professional boxers train to reduce body mass, potentially refining motor skills.
• The cortico-striatal circuit is crucial for motor learning and execution.

Purpose of the Study:

• To investigate brain structure and functional connectivity in boxers.
• To examine neuroplasticity in relation to boxing match training.

Main Methods:

• Longitudinal study comparing 21 male boxers to 22 matched controls.
• Brain imaging (gray matter volume, functional/structural connectivity) at three time points: 1 month before, 1 week before, and 1 month after a match.
• Body Mass Index (BMI) tracked throughout.

Main Results:

• Boxers' BMI significantly decreased closer to the match.
• Boxers showed increased gray matter volume in the left putamen compared to controls.
• Enhanced functional connectivity between the left primary motor cortex (M1) and left putamen in boxers.
• Increased structural connectivity within the motor loop from 1 month to 1 week before the match.

Conclusions:

• Boxers display neuroplastic changes in motor-related brain regions.
• These changes, particularly in the cortico-striatal circuit, are associated with refined motor skills developed through training.
• The findings support the hypothesis that the motor loop underlies the well-defined movements characteristic of boxers.