Isotonic resistance jaw exercise alters jaw muscle coordination during jaw movements

摘要: The aim was to investigate the effects of isotonic resistance exercise on electro-myographic (EMG) activity jaw muscles during standardised movements. In 12 asymptomatic adults surface EMG recorded from anterior temporalis and masseter bilaterally right digastric muscle lateral movements that tracked a target. Participants were randomly assigned Control group or an Exercise group. Jaw movement collected (i) at baseline, before task (pre-exercise); (ii) immediately after (isotonic 60% MVC against movements); (iii) 4 weeks home-based programme; and, (iv) 8-weeks follow-up. There no significant within-subject between-group differences in velocity amplitude either within between data collection sessions (P > 0.05). However, over 8 study, three tested variables (EMG Duration, Time Peak Onset, relative Movement Onset) showed < 0.05) five muscles. Many changes occurred group, while tended maintain majority pre-exercise baseline values. suggest level variability recording recruitment patterns some mastication for production same may reduce this variability.