Sowman Paul F, Ogston Kirstin M, Türker Kemal S
Research Centre for Human Movement Control, Discipline of Physiology, School of Molecular and Biomedical Science, University of Adelaide, Adelaide, SA 5005, Australia.
Exp Brain Res. 2007 Jun;179(4):673-82. doi: 10.1007/s00221-006-0824-9. Epub 2007 Jan 10.
This study links the reduction in jaw physiological tremor around 8 Hz following periodontal mechanoreceptor (PMR) anaesthetisation to changes in coherence between masseteric motor unit discharges. We have recorded single motor unit activity from two separate sites in the right masseter muscle during a low level tonic contraction, both prior to and during anaesthetisation of the peri-incisal PMRs. Anaesthetisation of PMRs decreased coherent activity between motor units circa 8 Hz, and decreased synchrony between the same motor unit pairs. It is proposed that tremor-generating inputs that cause rhythmic synchronisation of masseteric motor units arise from, or are amplified by the PMRs.
本研究将牙周机械感受器（PMR）麻醉后8Hz左右下颌生理震颤的降低与咬肌运动单位放电之间的相干性变化联系起来。我们在切牙周围PMR麻醉之前和期间，在低水平强直收缩过程中记录了右侧咬肌两个不同部位的单个运动单位活动。PMR麻醉降低了约8Hz时运动单位之间的相干活动，并降低了相同运动单位对之间的同步性。有人提出，导致咬肌运动单位节律性同步的震颤产生输入源自PMR或由其放大。
