Watt D M, Turnbull J R, Saberi M, Beyli M S, Aguilar E
J Oral Rehabil. 1976 Oct;3(4):371-85. doi: 10.1111/j.1365-2842.1976.tb01452.x.
The occurrence of silent periods in masseter muscle activity was investigated during percussion of the bony structures of the head and neck, during occlusion of the teeth on surfaces of varying hardness, and during chewing of different food-stuffs. Silent periods were demonstrated on percussion during isometric and isotonic contraction of the masseter muscles and the occurrence of silent periods was influenced by the force of occlusion and by the nature of the surface contacted. Mandibular velocity was investigated during tapping and chewing sequences by ultra-high-speed cinematography, but it was not found possible to identify a critical change in mandibular velocity associated with the occurrence of silent periods. More silent periods were observed during the chewing of hard foods than of soft foods and there were more silent periods near the beginning of chewing sequences than towards the end. Differences in latency and duration of silent periods were observed in relation to artificial changes in the occlusion.
在对头颈部骨结构进行叩诊、在不同硬度表面咬合牙齿以及咀嚼不同食物时，对咬肌活动中静息期的出现情况进行了研究。在咬肌等长收缩和等张收缩过程中进行叩诊时可显示出静息期，静息期的出现受咬合力量和所接触表面性质的影响。通过超高速电影摄影术在轻敲和咀嚼过程中研究了下颌速度，但未发现能够确定与静息期出现相关的下颌速度的临界变化。与咀嚼软食相比，咀嚼硬食时观察到更多的静息期，并且在咀嚼序列开始时比接近结束时出现更多的静息期。观察到静息期的潜伏期和持续时间因咬合的人为改变而有所不同。
