Karkazis H C, Kossioni A, Heath M R, van Willigen J D
Department of Prosthetic Dentistry, London Hospital Medical College, U.K.
J Oral Rehabil. 1993 Jul;20(4):433-9. doi: 10.1111/j.1365-2842.1993.tb01627.x.
The digastric motor responses in the unloading reflex were investigated in a sample of 10 younger and eight older dentate subjects. The occurrence of the pre-collapse digastric activity (PDA) and the reflex events (burst of activity) following the mandibular unloading (DB) were studied separately. PDA was nearly consistent in half of the subjects of both groups. DB was clearly identified in 60% of the younger subjects, but in 54.2% of the older subjects. The mean latency of DB found in the younger subjects was 32.4 +/- 9.5 ms but 34.5 +/- 8.8 ms in the older subjects. For the latencies found we can infer that they are related to polysynaptic pathways. Also a slight tendency for decreased frequency of occurrence and increased latencies of DB is observed in the older age group.
在10名年轻和8名老年齿状突受试者的样本中，研究了卸载反射中的二腹肌运动反应。分别研究了下颌卸载（DB）前崩溃二腹肌活动（PDA）的发生情况以及反射事件（活动爆发）。两组中近一半的受试者PDA情况几乎一致。60%的年轻受试者能明确识别出DB，但老年受试者中这一比例为54.2%。年轻受试者中发现的DB平均潜伏期为32.4 +/- 9.5毫秒，而老年受试者为34.5 +/- 8.8毫秒。对于所发现的潜伏期，我们可以推断它们与多突触通路有关。在老年组中还观察到DB出现频率略有下降和潜伏期增加的轻微趋势。
