Poster C116, Sunday, March 26, 5:00 – 7:00 pm, Pacific Concourse
A network for auditory-motor coupling: comparison between musicians and nonmusicians
Shoji Tanaka1, Eiji Kirino2,3; 1Sophia University, 2Juntendo University, 3Shizuoka Hospital
Auditory-motor coupling is critical for musical performance, in which auditory feedback is used to ensure correct or ideal motor output for the performance. Previous studies have demonstrated activation of the operculum while performing or listening to music. The parietal operculum (PO) has functional connections with the auditory and motor areas, suggesting that the PO mediates auditory-motor coupling. We hypothesize that this network also mediates auditory-motor integration for musical performance. If this hypothesis is correct, long-term musical training would change the connectivity of the PO with auditory areas and/or motor areas. To test this hypothesis, we analyzed resting-state functional connectivity of this network in musicians (n = 35) and nonmusicians (n = 35). The ROI-to-ROI functional connectivity analysis showed that, among the Heschl’s gyrus (HG), plenum temporal (PT), precentral gyrus (preCG), and postcentral gyrus (postCG), the left PO in musicians had stronger functional connectivity than nonmusicians with all of these regions in the left hemisphere but none of in the right hemisphere (p < 0.05, uncorrected). The right PO in musicians had stronger functional connectivity with only the postCG in the right hemisphere but with HG and pre/postCG in the left hemisphere (p < 0.05, uncorrected). The direct functional connectivity between HG/PT and pre/postCG did not differ between groups. In contrast to the PO, there were no significant different in any of the connectivity of the central or frontal operculum with the HG, PT, preCG, and postCG. We therefore conclude that musicians have a stronger auditory-motor network connecting through the PO.
Topic Area: PERCEPTION & ACTION: Audition