Cappell M S, Spray D C, Bennett M V
Department of Medicine, Albert Einstein College of Medicine, Bronx, NY 10461.
Brain Res. 1988 Jun 28;454(1-2):244-50. doi: 10.1016/0006-8993(88)90824-4.
Protractor muscles in the gastropod mollusc Navanax inermis exhibit typical spontaneous miniature end plate potentials with mean amplitude 1.71 +/- 1.19 (standard deviation) mV. The evoked end plate potential is quantized, with a quantum equal to the miniature end plate potential amplitude. When their rate is stationary, occurrence of miniature end plate potentials is a random, Poisson process. When non-stationary, spontaneous miniature end plate potential occurrence is a non-stationary Poisson process, a Poisson process with the mean frequency changing with time. This extends the random Poisson model for miniature end plate potentials to the frequently observed non-stationary occurrence. Reported deviations from a Poisson process can sometimes be accounted for by the non-stationary Poisson process and more complex models, such as clustered release, are not always needed.
裸鳃亚目软体动物加州海兔体内的牵引肌呈现出典型的自发微小终板电位，平均振幅为1.71±1.19（标准差）毫伏。诱发终板电位是量子化的，一个量子等于微小终板电位的振幅。当它们的发放率稳定时，微小终板电位的出现是一个随机的泊松过程。当发放率不稳定时，自发微小终板电位的出现是一个非平稳泊松过程，即一个平均频率随时间变化的泊松过程。这将微小终板电位的随机泊松模型扩展到了经常观察到的非平稳出现情况。报告中与泊松过程的偏差有时可以由非平稳泊松过程来解释，并不总是需要更复杂的模型，如成簇释放模型。
