[P2] Poster: Day 2

[P2-27] The effect of repetitive transcranial magnetic stimulation (rTMS) over the supplementary motor area on the groove experience

*Takahide Etani^1,2,3, Mitsuaki Takemi^4,5, Tomohiro Samma⁶, Jun Nitta⁷, Saki Homma^6,8, Kenta Ueda⁶, Keigo Yoshida^9,6, Kenjun Hayashida^4,5, Tatsuro Fujimaki⁴, Sotaro Kondoh^6,9,10, Kazutoshi Kudo⁷, Shinya Fujii⁹ (1. Keio Research Institute at SFC (Japan), 2. Keio Univ. Hospital (Japan), 3. Japanese Red Cross Ashikaga Hospital (Japan), 4. Graduate School of Science and Technology, Keio Univ. (Japan), 5. Graduate School of Advanced Science and Engineering, Hiroshima Univ. (Japan), 6. Graduate School of Media and Governance, Keio Univ. (Japan), 7. Graduate School of Arts and Sciences, The Univ. of Tokyo (Japan), 8. Department of Neuropsychiatry, Keio Univ. School of Medicine (Japan), 9. Faculty of Environment and Information Studies, Keio Univ. (Japan), 10. Japan Society for the Promotion of Science (Japan))

Keywords:

groove,pleasure,repetitive transcranial magnetic stimulation (rTMS),supplementary motor area (SMA),music

The pleasurable urge to move along with the music is called "groove." This study aimed to examine whether activation of the supplementary motor area (SMA) is related to the groove experience using repetitive transcranial magnetic stimulation (rTMS). We hypothesized that excitatory stimulation would enhance, and inhibitory stimulation would decrease, the groove experience compared to the sham condition. Fifteen healthy individuals (mean age = 24.8±7.26 years; 9 females) participated in the study. Each underwent three rTMS conditions using an automated TMS robot system: SMA-iTBS (excitatory intermittent theta burst stimulation over the SMA), SMA-cTBS (inhibitory continuous theta burst stimulation over the SMA), and sham stimulation over the vertex. After each session, participants listened to ten musical excerpts (five high-groove and five low-groove) from a previous study (Janata et al., 2012) and rated their experienced groove ("urge to move" and "pleasure") using a visual analog scale (0–100). A two-way ANOVA (stimulation condition [SMA-iTBS, SMA-cTBS, and sham] x music type [high-groove and low-groove music]) revealed no significant main effect of stimulation condition on either rating. There was a significant main effect of music group on “pleasure” ratings (F_(1,28) = 257.7, p < .001), with high-groove music receiving higher ratings. Contrary to our hypothesis, SMA stimulation did not significantly affect the groove experience, suggesting that the SMA may not be directly involved in the groove experience.

References
Janata, P., Tomic, S. T., & Haberman, J. M. (2012). Sensorimotor coupling in music and the psychology of the groove. Journal of Experimental Psychology. General, 141(1), 54–75. https://doi.org/10.1037/a0024208