OWN - Quintessenz Verlags-GmbH CI - Copyright Quintessenz Verlags-GmbH OCI - Copyright Quintessenz Verlags-GmbH TA - J Orofac Pain JT - Journal of Oral & Facial Pain and Headache IS - 2333-0376 (Electronic) IS - 2333-0384 (Print) IP - 2 VI - 32 PST - ppublish DP - 2018 PG - 167-177 LA - en TI - Modulation of Jaw Muscle Motor Response and Wake-Time Parafunctional Tooth Clenching with Music FAU - Cioffi, Iacopo AU - Cioffi I FAU - Sobhani, Mona AU - Sobhani M FAU - Tenenbaum, Howard C. AU - Tenenbaum H FAU - Howard, Alicia AU - Howard A FAU - Freeman, Bruce V. AU - Freeman B FAU - Thaut, Michael AU - Thaut M CN - OT - bruxism OT - guided music listening OT - oral behaviors OT - surface electromyography OT - temporomandibular joint disorders AB - Aims: To evaluate the effects of Guided Music Listening (GML) on masticatory muscles and on the amplitude of wake-time tooth clenching in individuals with higher vs lower frequency of clenching episodes. Methods: The electromyographic (EMG) activity of the right masseter was recorded during three 20-minute music (relaxing, stress/tension, and favorite) tasks and a control no-music task in 10 (mean age ± standard deviation [SD] = 21.4 ± 3.0 years) and 11 (22.6 ± 2.9 years) healthy volunteers with higher (HP) vs lower (LP) frequency of tooth-clenching episodes, respectively. EMG episodes greater than 10% of the maximum voluntary contraction (EMG activity of the masseter during tooth clenching) and below 10% (EMG activity during rest) were analyzed. Nonparametric tests were used to assess between-group and within-group (between-task) differences in primary outcome measures. Results: In both groups, EMG activity during rest was the greatest during the stress/tension task, and it was the lowest during the favorite task in the LP group and the relaxing task in the HP group (all P < .001). In the HP group, the amplitude of clenching episodes was significantly lower during the favorite and stress/tension tasks than during the relaxing task (all P < .05), while in the LP group, it was significantly lower during the stress/tension task than during the control task (P = .001). The experiment did not affect the frequency or duration of clenching episodes. Conclusion: GML modulates masticatory muscle activity. The response to GML depends on the frequency of clenching and the type of music. AID - 851433