Lateralization of brain function in cognitive music processing of chord versus rhythm
Shih Y, Chung H, Ko C, Wang Y
National Taiwan University
The difference of brain function between chord distinguishing and rhythm recognition was investigated on 7 subjects using fMRI. The left lateralization phenomenon was found in both tasks, with Brodmanns area (BA) 6 and 40 being the common activation regions. BA9, 22, and 38 showed slight activations with similar left-side lateralization. BA44 and 45 were individually activated exclusively in chord distinguishing and rhythm recognition, respectively, differentiating the unique properties of chord and rhythm and providing a linkage between music cognition and speech expression.