Archives of oral biology · 2009
Reproducible effects of subjectively assessed muscle fatigue on an inhibitory jaw reflex in humans.
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van der Kaaij Nicoline C W, Maillou Pauline, van der Weijden Jacobus J, Naeije Machiel, Lobbezoo Frank
Аннотация
OBJECTIVE: To evaluate the effects of exercise-induced, subjectively assessed muscle fatigue on an inhibitory jaw reflex, evoked by electrical stimulation of the upper lip. In addition, the reproducibility of these effects was assessed.
DESIGN: Eight subjects participated in two experimental sessions that were two weeks apart. During each session, a baseline recording, a post-conditioning recording, and two recovery recordings were obtained. The post-conditioning recording was obtained immediately after provocation of jaw muscle fatigue by intense chewing. The endpoint of provocation was reached 30s after a subject had crossed the value '6' on a 10 cm long visual analogue scale.
RESULTS: Subjectively assessed jaw muscle fatigue caused a decrease of about 50% in the size of the late inhibition in the post-conditioning recording (ANOVA: p=0.001; Bonferroni contrasts: p<0.05). Full recovery to baseline values was already achieved at the first recovery recording. No significant differences were found between both sessions (ANOVA, p=0.677).
CONCLUSION: Exercise-induced, subjectively assessed jaw muscle fatigue causes a reproducible, transient suppression in the size of the late inhibitory jaw reflex wave.
DESIGN: Eight subjects participated in two experimental sessions that were two weeks apart. During each session, a baseline recording, a post-conditioning recording, and two recovery recordings were obtained. The post-conditioning recording was obtained immediately after provocation of jaw muscle fatigue by intense chewing. The endpoint of provocation was reached 30s after a subject had crossed the value '6' on a 10 cm long visual analogue scale.
RESULTS: Subjectively assessed jaw muscle fatigue caused a decrease of about 50% in the size of the late inhibition in the post-conditioning recording (ANOVA: p=0.001; Bonferroni contrasts: p<0.05). Full recovery to baseline values was already achieved at the first recovery recording. No significant differences were found between both sessions (ANOVA, p=0.677).
CONCLUSION: Exercise-induced, subjectively assessed jaw muscle fatigue causes a reproducible, transient suppression in the size of the late inhibitory jaw reflex wave.