A voxel-based approach to gray matter asymmetries

Area of Science:

• Neuroscience
• Neuroimaging
• Human Brain Anatomy

Background:

• Previous studies suggest links between absolute pitch (AP), gender, and brain asymmetry.
• Traditional region-of-interest (ROI) analyses have shown these differences, but may be limited by user bias.

Purpose of the Study:

• To investigate gray matter (GM) asymmetries in professional musicians using Voxel-Based Morphometry (VBM).
• To compare GM asymmetries between male and female musicians with and without AP.
• To validate VBM as a method for detecting brain asymmetries.

Main Methods:

• Voxel-based morphometry (VBM) was applied to analyze GM asymmetries.
• A sample of 60 male and female professional musicians, with and without AP, was studied.
• Whole-brain analysis was performed to minimize user bias.

Main Results:

• Male musicians with AP exhibited greater leftward lateralization in the anterior planum temporale (PT) compared to male non-AP musicians.
• Male non-AP musicians showed increased leftward GM asymmetry in the postcentral gyrus compared to female non-AP musicians.
• Pronounced GM asymmetries were detected in the musician sample, some not previously identified.

Conclusions:

• VBM successfully confirmed previously reported gender- and AP-related brain asymmetries.
• The findings support the utility of VBM for examining GM asymmetries.
• VBM identified novel GM asymmetries in musicians, highlighting its sensitivity and comprehensive analysis potential.