Longitudinal Changes of Quantitative Brain Tissue Properties Induced by Balance Training.

Area of Science:

• Neuroscience
• Neuroimaging
• Human Physiology

Background:

• Brain plasticity is crucial for adaptation, especially in aging and disease.
• Current imaging methods often lack specificity regarding tissue properties, hindering treatment optimization.
• Motor training induces structural brain changes, but the underlying microstructural processes are not fully understood.

Purpose of the Study:

• To non-invasively map microstructural brain changes using quantitative MRI (qMRI).
• To investigate changes in brain tissue properties (iron, myelin, water) after motor balance training.
• To correlate these microstructural changes with performance in healthy young adults.

Main Methods:

• Quantitative MRI (qMRI) was used to measure brain tissue properties.
• Magnetization transfer saturation (MTsat) and transverse relaxation rate (R2*) were assessed.
• 26 healthy young adults underwent 4 weeks of motor balance training.

Main Results:

• A decrease in myelin-related MTsat was observed in the left frontal cortex.
• Iron-sensitive R2* changes correlated with performance in visual and limbic areas.
• Specific microstructural alterations were identified in response to balance training.

Conclusions:

• Motor balance training induces region-specific microstructural plasticity in the human brain.
• qMRI can detect changes in myelin and iron content related to motor learning.
• This study provides insights into the microstructural basis of whole-body motor learning.