Increased gray matter volume of left pars opercularis in male orchestral musicians correlate positively with years of musical performance
Article first published online: 22 DEC 2010
Copyright © 2010 Wiley-Liss, Inc.
Journal of Magnetic Resonance Imaging
Volume 33, Issue 1, pages 24–32, January 2011
How to Cite
Abdul-Kareem, I. A., Stancak, A., Parkes, L. M. and Sluming, V. (2011), Increased gray matter volume of left pars opercularis in male orchestral musicians correlate positively with years of musical performance. J. Magn. Reson. Imaging, 33: 24–32. doi: 10.1002/jmri.22391
- Issue published online: 22 DEC 2010
- Article first published online: 22 DEC 2010
- Manuscript Accepted: 10 SEP 2010
- Manuscript Received: 17 MAY 2010
- Broca's area;
- pars opercularis;
To compare manual volumetry of gray matter (GM) / white matter (WM) of Broca's area subparts: pars opercularis (POP) and pars triangularis (PTR) in both hemispheres between musicians and nonmusician, as it has been shown that these regions are crucial for musical abilities. A previous voxel-based morphometric (VBM) study conducted in our laboratory reported increased GM density in Broca's area of left hemisphere in male orchestral musicians. Functional segregation of POP/PTR justified separate volumetric analysis of these parts.
Materials and Methods
We used the same cohort for the VBM study. Manual morphometry (stereology) was used to compare volumes between 26/26 right-handed orchestral musicians/nonmusicians.
As expected, musicians showed significantly increased GM volume in the Broca's area, specifically in the left POP. No significant results were detected in right POP, left/right PTR GM volumes, and WM volumes for all regions. Results were positively correlated with years of musical performance (r = 0.7, P = 0.0001).
This result corroborates the VBM study and is in line with the hypothesis of critical involvement of POP in hearing-action integration being an integral component of frontoparietotemporal mirror neuron network. We hypothesize that increased size of musicians' left POP represent use-dependent structural adaptation in response to intensive audiomotor skill acquisition. J. Magn. Reson. Imaging 2011;33:24–32. © 2010 Wiley-Liss, Inc.