[青蛙舌头快速和慢速适应单元的电生理特性及其产生电位]。

Shika gakuho. Dental science reports Pub Date : 1990-03-01

A Munakata

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引用次数: 0

摘要

本研究的目的是确定快速和缓慢适应单位在蛙舌的真菌状乳头的刺激反应特性。其次，分别记录单菌类乳头状舌咽神经制剂中快速和慢速适应机械感受器的快速和慢速适应发生器电位。结果1 .快适应单元和慢适应单元的脉冲响应特性1)大多数真菌状乳头同时受快适应单元和慢适应单元的支配。快速适应单元对每个刺激产生1 ~ 4个脉冲，适应时间小于17.5 msec。慢适应单元在3秒的压力刺激下产生27.8 +/- 8.0个脉冲(范围:11-49个脉冲n = 18)，适应时间为1.64 +/- 0.73秒(范围:0.53-2.86秒，n = 18)。2)快速适应单元的阈值、潜伏期和绝对不应期分别为7.0 +/- 1.9微米(范围:3.0-11.8微米，n = 189)、2.31 +/- 1.29毫秒(范围:0.85-6.80毫秒，n = 31)和2.9 +/- 1.0毫秒(范围:1.8-5.6毫秒，n = 33)。慢适应单元的反应速率分别为4.6 +/- 1.8 μ m(范围:2.0-11.8 μ m, n = 152)、13.54 +/- 11.29 μ s(范围:2.00-54.00 μ s, n = 35)和6.5 +/- 3.6 μ s(范围:1.9-19.6 μ s, n = 35)。3)一个快速适应单元支配5.1 +/- 2.5个真菌状乳头(范围:1 ~ 13个，n = 58)，接受面积0.342 +/- 0.312 mm2(范围:0.005 ~ 1.548 mm2, n = 55)。一个慢适应单元支配3.3 +/- 2.0个真菌状乳头(范围:1-12个真菌状乳头，n = 50)，接受面积为0.158 +/- 0.144 mm2(范围:0.006-0.616 mm2, n = 29)。4)快速适应单元传导速度为23.0 +/- 3.1 m/sec(范围:15.0-30.6 m/sec, n = 528)，慢速适应单元传导速度为12.8 +/- 2.2 m/sec(范围:4.4-21.1 m/sec, n = 495)。传导速度是根据在神经纤维的两个不同点上传导所需的时间来计算的。5)快速和慢速适应单元的振动刺激上限分别为62.7 +/- 10.5 Hz(范围:50-80 Hz, n = 15)和34.5 +/- 9.6 Hz(范围:15-45 Hz, n = 10)。2(摘要删节为400字)

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[Electrophysiological properties of fast- and slow-adapting units and their generator potentials of the frog tongue].

The purpose of this study was to determine the stimulus response properties of fast and slow adapting units in the fungiform papillae of the frog tongue. Secondly, fast- and slow- adapting generator potentials were recorded from fast and slow-adapting mechanoreceptors in the single fungiform papilla glossopharyngeal nerve preparations, respectively. Results I. Impulse response properties of fast- and slow-adapting units 1) Most of the fungiform papillae were innervated by both fast- and slow-adapting units. Fast-adapting units evoked 1-4 impulses to each stimulus and the adaptation time was less than 17.5 msec. Slow-adapting units evoked 27.8 +/- 8.0 impulses (range: 11-49 impulses n = 18) during a pressure stimulation of 3 sec, and the adaptation time was 1.64 +/- 0.73 sec (range: 0.53-2.86 sec, n = 18). 2) Threshold, latency and absolute refractory period for fast-adapting units were 7.0 +/- 1.9 microns (range: 3.0-11.8 microns, n = 189), 2.31 +/- 1.29 msec (range: 0.85-6.80 msec, n = 31) and 2.9 +/- 1.0 msec (range: 1.8-5.6 msec, n = 33), respectively. Those for slow-adapting units were 4.6 +/- 1.8 microns (range: 2.0-11.8 microns, n = 152), 13.54 +/- 11.29 msec (range: 2.00-54.00 msec, n = 35) and 6.5 +/- 3.6 msec (range: 1.9-19.6 msec, n = 35), respectively. 3) A fast-adapting unit innervated 5.1 +/- 2.5 fungiform papillae (range: 1-13 fungiform papillae, n = 58) and the receptive area was 0.342 +/- 0.312 mm2 (range: 0.005-1.548 mm2, n = 55). A slow-adapting unit innervated 3.3 +/- 2.0 fungiform papillae (range: 1-12 fungiform papillae, n = 50) and the receptive area was 0.158 +/- 0.144 mm2 (range: 0.006-0.616 mm2, n = 29). 4) Conduction velocity of the fast-adapting unit was 23.0 +/- 3.1 m/sec (range: 15.0-30.6 m/sec, n = 528) and that of the slow-adapting unit was 12.8 +/- 2.2 m/sec (range: 4.4-21.1 m/sec, n = 495). The conduction velocity was calculated from the time necessary to conduct at two different points of the nerve fiber. 5) The upper limits of fast- and slow-adapting units for vibratory stimulation were 62.7 +/- 10.5 Hz (range: 50-80 Hz, n = 15) and 34.5 +/- 9.6 Hz (range: 15-45 Hz, n = 10), respectively. II.(ABSTRACT TRUNCATED AT 400 WORDS)

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Shika gakuho. Dental science reports

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